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author | Christian Lamparter <chunkeey@googlemail.com> | 2017-02-10 17:44:43 +0100 |
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committer | Felix Fietkau <nbd@nbd.name> | 2017-02-11 20:57:56 +0100 |
commit | 9a9f2f97e6b66cc88866b3522372d4caa59b26de (patch) | |
tree | f05b66ca99f795a300efd2cea7b6dce0df8b365a /target/linux/apm821xx/patches-4.9/702-powerpc_ibm_phy_add_dt_parser.patch | |
parent | 9827c3e9b9d366be2edc8f1d27a1b84d03cfa97d (diff) | |
download | upstream-9a9f2f97e6b66cc88866b3522372d4caa59b26de.tar.gz upstream-9a9f2f97e6b66cc88866b3522372d4caa59b26de.tar.bz2 upstream-9a9f2f97e6b66cc88866b3522372d4caa59b26de.zip |
apm821xx: add linux 4.9 apm821xx patches
This patch updates the apm821xx target to use the 4.9 kernel.
Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
Diffstat (limited to 'target/linux/apm821xx/patches-4.9/702-powerpc_ibm_phy_add_dt_parser.patch')
-rw-r--r-- | target/linux/apm821xx/patches-4.9/702-powerpc_ibm_phy_add_dt_parser.patch | 328 |
1 files changed, 328 insertions, 0 deletions
diff --git a/target/linux/apm821xx/patches-4.9/702-powerpc_ibm_phy_add_dt_parser.patch b/target/linux/apm821xx/patches-4.9/702-powerpc_ibm_phy_add_dt_parser.patch new file mode 100644 index 0000000000..f1edb9cc7a --- /dev/null +++ b/target/linux/apm821xx/patches-4.9/702-powerpc_ibm_phy_add_dt_parser.patch @@ -0,0 +1,328 @@ +From b1c54da602ae9215cfbde1c3ed3b6296b76f07fc Mon Sep 17 00:00:00 2001 +Message-Id: <b1c54da602ae9215cfbde1c3ed3b6296b76f07fc.1486337989.git.chunkeey@googlemail.com> +In-Reply-To: <246bd6614529d28dc48b11981ab5dae7a7364fc2.1486337989.git.chunkeey@googlemail.com> +References: <246bd6614529d28dc48b11981ab5dae7a7364fc2.1486337989.git.chunkeey@googlemail.com> +From: Christian Lamparter <chunkeey@gmail.com> +Date: Mon, 13 Jun 2016 15:42:21 +0200 +Subject: [RFC 2/2] net: emac: add support for device-tree based PHY discovery + and setup +To: netdev@vger.kernel.org, + devicetree@vger.kernel.org +Cc: David S. Miller <davem@davemloft.net>, + Ivan Mikhaylov <ivan@de.ibm.com>, + Mark Rutland <mark.rutland@arm.com>, + Rob Herring <robh+dt@kernel.org> + +This patch adds glue-code that allows the EMAC driver to interface +with the existing dt-supported PHYs in drivers/net/phy. + +Because currently, the emac driver maintains a small library of +supported phys for in a private phy.c file located in the drivers +directory. + +The support is limited to mostly single ethernet transceiver like the: +CIS8201, BCM5248, ET1011C, Marvell 88E1111 and 88E1112, AR8035. +However, routers like the Netgear WNDR4700 and Cisco Meraki MX60(W) +have a 5-port switch (QCA8327N) attached to the MDIO of the EMAC. +The switch chip has already a proper phy-driver (ar8216) that uses +the generic phy library. + +Signed-off-by: Christian Lamparter <chunkeey@googlemail.com> +--- +--- a/drivers/net/ethernet/ibm/emac/core.c ++++ b/drivers/net/ethernet/ibm/emac/core.c +@@ -42,6 +42,7 @@ + #include <linux/of_address.h> + #include <linux/of_irq.h> + #include <linux/of_net.h> ++#include <linux/of_mdio.h> + #include <linux/slab.h> + + #include <asm/processor.h> +@@ -2422,6 +2423,229 @@ static int emac_read_uint_prop(struct de + return 0; + } + ++static void emac_adjust_link(struct net_device *ndev) ++{ ++ struct emac_instance *dev = netdev_priv(ndev); ++ struct phy_device *phy = dev->phy_dev; ++ ++ dev->phy.autoneg = phy->autoneg; ++ dev->phy.speed = phy->speed; ++ dev->phy.duplex = phy->duplex; ++ dev->phy.pause = phy->pause; ++ dev->phy.asym_pause = phy->asym_pause; ++ dev->phy.advertising = phy->advertising; ++} ++ ++static int emac_mii_bus_read(struct mii_bus *bus, int addr, int regnum) ++{ ++ return emac_mdio_read(bus->priv, addr, regnum); ++} ++ ++static int emac_mii_bus_write(struct mii_bus *bus, int addr, int regnum, u16 val) ++{ ++ emac_mdio_write(bus->priv, addr, regnum, val); ++ return 0; ++} ++ ++static int emac_mii_bus_reset(struct mii_bus *bus) ++{ ++ struct emac_instance *dev = netdev_priv(bus->priv); ++ int err; ++ ++ err = emac_reset(dev); ++ if (err) ++ return err; ++ /* Meraki MX60(W)'s uboot will disable the switch and ++ * a bus reset won't do anything. */ ++ emac_mii_reset_phy(&dev->phy); ++ return 0; ++} ++ ++static int emac_mdio_setup_aneg(struct mii_phy *phy, u32 advertise) ++{ ++ struct net_device *ndev = phy->dev; ++ struct emac_instance *dev = netdev_priv(ndev); ++ ++ dev->phy.autoneg = AUTONEG_ENABLE; ++ dev->phy.speed = SPEED_1000; ++ dev->phy.duplex = DUPLEX_FULL; ++ dev->phy.advertising = advertise; ++ phy->autoneg = AUTONEG_ENABLE; ++ phy->speed = dev->phy.speed; ++ phy->duplex = dev->phy.duplex; ++ phy->advertising = advertise; ++ return phy_start_aneg(dev->phy_dev); ++} ++ ++static int emac_mdio_setup_forced(struct mii_phy *phy, int speed, int fd) ++{ ++ struct net_device *ndev = phy->dev; ++ struct emac_instance *dev = netdev_priv(ndev); ++ ++ dev->phy.autoneg = AUTONEG_DISABLE; ++ dev->phy.speed = speed; ++ dev->phy.duplex = fd; ++ phy->autoneg = AUTONEG_DISABLE; ++ phy->speed = speed; ++ phy->duplex = fd; ++ return phy_start_aneg(dev->phy_dev); ++} ++ ++static int emac_mdio_poll_link(struct mii_phy *phy) ++{ ++ struct net_device *ndev = phy->dev; ++ struct emac_instance *dev = netdev_priv(ndev); ++ int res; ++ ++ res = phy_read_status(dev->phy_dev); ++ if (res) { ++ dev_err(&dev->ofdev->dev, "link update failed (%d).", res); ++ return ethtool_op_get_link(ndev); ++ } ++ ++ return dev->phy_dev->link; ++} ++ ++static int emac_mdio_read_link(struct mii_phy *phy) ++{ ++ struct net_device *ndev = phy->dev; ++ struct emac_instance *dev = netdev_priv(ndev); ++ int res; ++ ++ res = phy_read_status(dev->phy_dev); ++ if (res) ++ return res; ++ ++ dev->phy.speed = phy->speed; ++ dev->phy.duplex = phy->duplex; ++ dev->phy.pause = phy->pause; ++ dev->phy.asym_pause = phy->asym_pause; ++ return 0; ++} ++ ++static int emac_mdio_init_phy(struct mii_phy *phy) ++{ ++ struct net_device *ndev = phy->dev; ++ struct emac_instance *dev = netdev_priv(ndev); ++ ++ phy_start(dev->phy_dev); ++ dev->phy.autoneg = phy->autoneg; ++ dev->phy.speed = phy->speed; ++ dev->phy.duplex = phy->duplex; ++ dev->phy.advertising = phy->advertising; ++ dev->phy.pause = phy->pause; ++ dev->phy.asym_pause = phy->asym_pause; ++ ++ return phy_init_hw(dev->phy_dev); ++} ++ ++static const struct mii_phy_ops emac_dt_mdio_phy_ops = { ++ .init = emac_mdio_init_phy, ++ .setup_aneg = emac_mdio_setup_aneg, ++ .setup_forced = emac_mdio_setup_forced, ++ .poll_link = emac_mdio_poll_link, ++ .read_link = emac_mdio_read_link, ++}; ++ ++static int emac_dt_mdio_probe(struct emac_instance *dev) ++{ ++ struct device_node *mii_np; ++ int res; ++ ++ mii_np = of_get_child_by_name(dev->ofdev->dev.of_node, "mdio"); ++ if (!mii_np) { ++ dev_err(&dev->ofdev->dev, "no mdio definition found."); ++ return -ENODEV; ++ } ++ ++ if (!of_device_is_available(mii_np)) { ++ res = 1; ++ goto put_node; ++ } ++ ++ dev->mii_bus = devm_mdiobus_alloc(&dev->ofdev->dev); ++ if (!dev->mii_bus) { ++ res = -ENOMEM; ++ goto put_node; ++ } ++ ++ dev->mii_bus->priv = dev->ndev; ++ dev->mii_bus->parent = dev->ndev->dev.parent; ++ dev->mii_bus->name = "emac_mdio"; ++ dev->mii_bus->read = &emac_mii_bus_read; ++ dev->mii_bus->write = &emac_mii_bus_write; ++ dev->mii_bus->reset = &emac_mii_bus_reset; ++ snprintf(dev->mii_bus->id, MII_BUS_ID_SIZE, "%s", dev->ofdev->name); ++ res = of_mdiobus_register(dev->mii_bus, mii_np); ++ if (res) { ++ dev_err(&dev->ofdev->dev, "cannot register MDIO bus %s (%d)", ++ dev->mii_bus->name, res); ++ } ++ ++ put_node: ++ of_node_put(mii_np); ++ return res; ++} ++ ++static int emac_dt_phy_probe(struct emac_instance *dev, ++ struct device_node *phy_handle) ++{ ++ u32 phy_flags = 0; ++ int res; ++ ++ res = of_property_read_u32(phy_handle, "phy-flags", &phy_flags); ++ if (res < 0 && res != -EINVAL) ++ return res; ++ ++ dev->phy.def = devm_kzalloc(&dev->ofdev->dev, sizeof(*dev->phy.def), ++ GFP_KERNEL); ++ if (!dev->phy.def) ++ return -ENOMEM; ++ ++ dev->phy_dev = of_phy_connect(dev->ndev, phy_handle, ++ &emac_adjust_link, phy_flags, ++ PHY_INTERFACE_MODE_RGMII); ++ if (!dev->phy_dev) { ++ dev_err(&dev->ofdev->dev, "failed to connect to PHY.\n"); ++ return -ENODEV; ++ } ++ ++ dev->phy.def->phy_id = dev->phy_dev->drv->phy_id; ++ dev->phy.def->phy_id_mask = dev->phy_dev->drv->phy_id_mask; ++ dev->phy.def->name = dev->phy_dev->drv->name; ++ dev->phy.def->ops = &emac_dt_mdio_phy_ops; ++ dev->phy.features = dev->phy_dev->supported; ++ dev->phy.address = dev->phy_dev->mdio.addr; ++ dev->phy.mode = dev->phy_dev->interface; ++ return 0; ++} ++ ++static int emac_probe_dt_phy(struct emac_instance *dev) ++{ ++ struct device_node *np = dev->ofdev->dev.of_node; ++ struct device_node *phy_handle; ++ int res = 0; ++ ++ phy_handle = of_parse_phandle(np, "phy-handle", 0); ++ ++ if (phy_handle) { ++ res = emac_dt_mdio_probe(dev); ++ if (!res) { ++ res = emac_dt_phy_probe(dev, phy_handle); ++ if (!res) ++ res = 1; ++ else ++ mdiobus_unregister(dev->mii_bus); ++ } ++ } ++ ++ of_node_put(phy_handle); ++ /* if no phy device was specified in the device tree, then we fallback ++ * to the old emac_phy.c probe code for compatibility reasons. ++ */ ++ return res; ++} ++ + static int emac_init_phy(struct emac_instance *dev) + { + struct device_node *np = dev->ofdev->dev.of_node; +@@ -2492,6 +2716,22 @@ static int emac_init_phy(struct emac_ins + + emac_configure(dev); + ++ if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) { ++ int res = emac_probe_dt_phy(dev); ++ ++ if (res == 1) { ++ mutex_unlock(&emac_phy_map_lock); ++ goto init_phy; ++ } else if (res < 0) { ++ mutex_unlock(&emac_phy_map_lock); ++ dev_err(&dev->ofdev->dev, "failed to attach dt phy (%d).\n", ++ res); ++ return res; ++ } ++ ++ /* continue with old code */ ++ } ++ + if (dev->phy_address != 0xffffffff) + phy_map = ~(1 << dev->phy_address); + +@@ -2519,6 +2759,7 @@ static int emac_init_phy(struct emac_ins + return -ENXIO; + } + ++ init_phy: + /* Init PHY */ + if (dev->phy.def->ops->init) + dev->phy.def->ops->init(&dev->phy); +@@ -2987,6 +3228,12 @@ static int emac_remove(struct platform_d + if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) + zmii_detach(dev->zmii_dev, dev->zmii_port); + ++ if (dev->phy_dev) ++ phy_disconnect(dev->phy_dev); ++ ++ if (dev->mii_bus) ++ mdiobus_unregister(dev->mii_bus); ++ + busy_phy_map &= ~(1 << dev->phy.address); + DBG(dev, "busy_phy_map now %#x" NL, busy_phy_map); + +--- a/drivers/net/ethernet/ibm/emac/core.h ++++ b/drivers/net/ethernet/ibm/emac/core.h +@@ -199,6 +199,10 @@ struct emac_instance { + struct emac_instance *mdio_instance; + struct mutex mdio_lock; + ++ /* Device-tree based phy configuration */ ++ struct mii_bus *mii_bus; ++ struct phy_device *phy_dev; ++ + /* ZMII infos if any */ + u32 zmii_ph; + u32 zmii_port; |