| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Florian Fainelli | 1731 | 66.30% | 28 | 44.44% |
| Doug Berger | 358 | 13.71% | 10 | 15.87% |
| Petri Gynther | 289 | 11.07% | 3 | 4.76% |
| Jeremy Linton | 122 | 4.67% | 2 | 3.17% |
| Stefan Wahren | 26 | 1.00% | 2 | 3.17% |
| Yang Yingliang | 21 | 0.80% | 1 | 1.59% |
| Andrew Lunn | 18 | 0.69% | 6 | 9.52% |
| Johan Hovold | 14 | 0.54% | 3 | 4.76% |
| Miaoqian Lin | 7 | 0.27% | 1 | 1.59% |
| Uwe Kleine-König | 7 | 0.27% | 1 | 1.59% |
| Jaedon Shin | 5 | 0.19% | 1 | 1.59% |
| Nicolas Saenz Julienne | 5 | 0.19% | 1 | 1.59% |
| Rafał Miłecki | 3 | 0.11% | 1 | 1.59% |
| Thomas Gleixner | 2 | 0.08% | 1 | 1.59% |
| Gustavo A. R. Silva | 2 | 0.08% | 1 | 1.59% |
| Heiner Kallweit | 1 | 0.04% | 1 | 1.59% |
| Total | 2611 | 63 |
// SPDX-License-Identifier: GPL-2.0-only /* * Broadcom GENET MDIO routines * * Copyright (c) 2014-2017 Broadcom */ #include <linux/acpi.h> #include <linux/types.h> #include <linux/delay.h> #include <linux/wait.h> #include <linux/mii.h> #include <linux/ethtool.h> #include <linux/bitops.h> #include <linux/netdevice.h> #include <linux/platform_device.h> #include <linux/phy.h> #include <linux/phy_fixed.h> #include <linux/brcmphy.h> #include <linux/of.h> #include <linux/of_net.h> #include <linux/of_mdio.h> #include <linux/platform_data/bcmgenet.h> #include <linux/platform_data/mdio-bcm-unimac.h> #include "bcmgenet.h" static void bcmgenet_mac_config(struct net_device *dev) { struct bcmgenet_priv *priv = netdev_priv(dev); struct phy_device *phydev = dev->phydev; u32 reg, cmd_bits = 0; /* speed */ if (phydev->speed == SPEED_1000) cmd_bits = CMD_SPEED_1000; else if (phydev->speed == SPEED_100) cmd_bits = CMD_SPEED_100; else cmd_bits = CMD_SPEED_10; cmd_bits <<= CMD_SPEED_SHIFT; /* duplex */ if (phydev->duplex != DUPLEX_FULL) { cmd_bits |= CMD_HD_EN | CMD_RX_PAUSE_IGNORE | CMD_TX_PAUSE_IGNORE; } else { /* pause capability defaults to Symmetric */ if (priv->autoneg_pause) { bool tx_pause = 0, rx_pause = 0; if (phydev->autoneg) phy_get_pause(phydev, &tx_pause, &rx_pause); if (!tx_pause) cmd_bits |= CMD_TX_PAUSE_IGNORE; if (!rx_pause) cmd_bits |= CMD_RX_PAUSE_IGNORE; } /* Manual override */ if (!priv->rx_pause) cmd_bits |= CMD_RX_PAUSE_IGNORE; if (!priv->tx_pause) cmd_bits |= CMD_TX_PAUSE_IGNORE; } /* Program UMAC and RGMII block based on established * link speed, duplex, and pause. The speed set in * umac->cmd tell RGMII block which clock to use for * transmit -- 25MHz(100Mbps) or 125MHz(1Gbps). * Receive clock is provided by the PHY. */ reg = bcmgenet_ext_readl(priv, EXT_RGMII_OOB_CTRL); reg |= RGMII_LINK; bcmgenet_ext_writel(priv, reg, EXT_RGMII_OOB_CTRL); reg = bcmgenet_umac_readl(priv, UMAC_CMD); reg &= ~((CMD_SPEED_MASK << CMD_SPEED_SHIFT) | CMD_HD_EN | CMD_RX_PAUSE_IGNORE | CMD_TX_PAUSE_IGNORE); reg |= cmd_bits; if (reg & CMD_SW_RESET) { reg &= ~CMD_SW_RESET; bcmgenet_umac_writel(priv, reg, UMAC_CMD); udelay(2); reg |= CMD_TX_EN | CMD_RX_EN; } bcmgenet_umac_writel(priv, reg, UMAC_CMD); } /* setup netdev link state when PHY link status change and * update UMAC and RGMII block when link up */ void bcmgenet_mii_setup(struct net_device *dev) { struct bcmgenet_priv *priv = netdev_priv(dev); struct phy_device *phydev = dev->phydev; u32 reg; if (phydev->link) { bcmgenet_mac_config(dev); } else { reg = bcmgenet_ext_readl(priv, EXT_RGMII_OOB_CTRL); reg &= ~RGMII_LINK; bcmgenet_ext_writel(priv, reg, EXT_RGMII_OOB_CTRL); } phy_print_status(phydev); } static int bcmgenet_fixed_phy_link_update(struct net_device *dev, struct fixed_phy_status *status) { struct bcmgenet_priv *priv; u32 reg; if (dev && dev->phydev && status) { priv = netdev_priv(dev); reg = bcmgenet_umac_readl(priv, UMAC_MODE); status->link = !!(reg & MODE_LINK_STATUS); } return 0; } void bcmgenet_phy_pause_set(struct net_device *dev, bool rx, bool tx) { struct phy_device *phydev = dev->phydev; linkmode_mod_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydev->advertising, rx); linkmode_mod_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, phydev->advertising, rx | tx); phy_start_aneg(phydev); mutex_lock(&phydev->lock); if (phydev->link) bcmgenet_mac_config(dev); mutex_unlock(&phydev->lock); } void bcmgenet_phy_power_set(struct net_device *dev, bool enable) { struct bcmgenet_priv *priv = netdev_priv(dev); u32 reg = 0; /* EXT_GPHY_CTRL is only valid for GENETv4 and onward */ if (GENET_IS_V4(priv) || priv->ephy_16nm) { reg = bcmgenet_ext_readl(priv, EXT_GPHY_CTRL); if (enable) { reg &= ~EXT_CK25_DIS; bcmgenet_ext_writel(priv, reg, EXT_GPHY_CTRL); mdelay(1); reg &= ~(EXT_CFG_IDDQ_BIAS | EXT_CFG_PWR_DOWN | EXT_CFG_IDDQ_GLOBAL_PWR); reg |= EXT_GPHY_RESET; bcmgenet_ext_writel(priv, reg, EXT_GPHY_CTRL); mdelay(1); reg &= ~EXT_GPHY_RESET; } else { reg |= EXT_CFG_IDDQ_BIAS | EXT_CFG_PWR_DOWN | EXT_GPHY_RESET | EXT_CFG_IDDQ_GLOBAL_PWR; bcmgenet_ext_writel(priv, reg, EXT_GPHY_CTRL); mdelay(1); reg |= EXT_CK25_DIS; } bcmgenet_ext_writel(priv, reg, EXT_GPHY_CTRL); udelay(60); } else { mdelay(1); } } static void bcmgenet_moca_phy_setup(struct bcmgenet_priv *priv) { if (priv->hw_params->flags & GENET_HAS_MOCA_LINK_DET) fixed_phy_set_link_update(priv->dev->phydev, bcmgenet_fixed_phy_link_update); } int bcmgenet_mii_config(struct net_device *dev, bool init) { struct bcmgenet_priv *priv = netdev_priv(dev); struct phy_device *phydev = dev->phydev; struct device *kdev = &priv->pdev->dev; const char *phy_name = NULL; u32 id_mode_dis = 0; u32 port_ctrl; u32 reg; switch (priv->phy_interface) { case PHY_INTERFACE_MODE_INTERNAL: phy_name = "internal PHY"; fallthrough; case PHY_INTERFACE_MODE_MOCA: /* Irrespective of the actually configured PHY speed (100 or * 1000) GENETv4 only has an internal GPHY so we will just end * up masking the Gigabit features from what we support, not * switching to the EPHY */ if (GENET_IS_V4(priv)) port_ctrl = PORT_MODE_INT_GPHY; else port_ctrl = PORT_MODE_INT_EPHY; if (!phy_name) { phy_name = "MoCA"; if (!GENET_IS_V5(priv)) port_ctrl |= LED_ACT_SOURCE_MAC; bcmgenet_moca_phy_setup(priv); } break; case PHY_INTERFACE_MODE_MII: phy_name = "external MII"; phy_set_max_speed(phydev, SPEED_100); port_ctrl = PORT_MODE_EXT_EPHY; break; case PHY_INTERFACE_MODE_REVMII: phy_name = "external RvMII"; /* of_mdiobus_register took care of reading the 'max-speed' * PHY property for us, effectively limiting the PHY supported * capabilities, use that knowledge to also configure the * Reverse MII interface correctly. */ if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, dev->phydev->supported)) port_ctrl = PORT_MODE_EXT_RVMII_50; else port_ctrl = PORT_MODE_EXT_RVMII_25; break; case PHY_INTERFACE_MODE_RGMII: /* RGMII_NO_ID: TXC transitions at the same time as TXD * (requires PCB or receiver-side delay) * * ID is implicitly disabled for 100Mbps (RG)MII operation. */ phy_name = "external RGMII (no delay)"; id_mode_dis = BIT(16); port_ctrl = PORT_MODE_EXT_GPHY; break; case PHY_INTERFACE_MODE_RGMII_TXID: /* RGMII_TXID: Add 2ns delay on TXC (90 degree shift) */ phy_name = "external RGMII (TX delay)"; port_ctrl = PORT_MODE_EXT_GPHY; break; case PHY_INTERFACE_MODE_RGMII_RXID: phy_name = "external RGMII (RX delay)"; port_ctrl = PORT_MODE_EXT_GPHY; break; default: dev_err(kdev, "unknown phy mode: %d\n", priv->phy_interface); return -EINVAL; } bcmgenet_sys_writel(priv, port_ctrl, SYS_PORT_CTRL); priv->ext_phy = !priv->internal_phy && (priv->phy_interface != PHY_INTERFACE_MODE_MOCA); /* This is an external PHY (xMII), so we need to enable the RGMII * block for the interface to work, unconditionally clear the * Out-of-band disable since we do not need it. */ reg = bcmgenet_ext_readl(priv, EXT_RGMII_OOB_CTRL); reg &= ~OOB_DISABLE; if (priv->ext_phy) { reg &= ~ID_MODE_DIS; reg |= id_mode_dis; if (GENET_IS_V1(priv) || GENET_IS_V2(priv) || GENET_IS_V3(priv)) reg |= RGMII_MODE_EN_V123; else reg |= RGMII_MODE_EN; } bcmgenet_ext_writel(priv, reg, EXT_RGMII_OOB_CTRL); if (init) dev_info(kdev, "configuring instance for %s\n", phy_name); return 0; } int bcmgenet_mii_probe(struct net_device *dev) { struct bcmgenet_priv *priv = netdev_priv(dev); struct device *kdev = &priv->pdev->dev; struct device_node *dn = kdev->of_node; phy_interface_t phy_iface = priv->phy_interface; struct phy_device *phydev; u32 phy_flags = PHY_BRCM_AUTO_PWRDWN_ENABLE | PHY_BRCM_DIS_TXCRXC_NOENRGY | PHY_BRCM_IDDQ_SUSPEND; int ret; /* Communicate the integrated PHY revision */ if (priv->internal_phy) phy_flags = priv->gphy_rev; /* This is an ugly quirk but we have not been correctly interpreting * the phy_interface values and we have done that across different * drivers, so at least we are consistent in our mistakes. * * When the Generic PHY driver is in use either the PHY has been * strapped or programmed correctly by the boot loader so we should * stick to our incorrect interpretation since we have validated it. * * Now when a dedicated PHY driver is in use, we need to reverse the * meaning of the phy_interface_mode values to something that the PHY * driver will interpret and act on such that we have two mistakes * canceling themselves so to speak. We only do this for the two * modes that GENET driver officially supports on Broadcom STB chips: * PHY_INTERFACE_MODE_RGMII and PHY_INTERFACE_MODE_RGMII_TXID. Other * modes are not *officially* supported with the boot loader and the * scripted environment generating Device Tree blobs for those * platforms. * * Note that internal PHY, MoCA and fixed-link configurations are not * affected because they use different phy_interface_t values or the * Generic PHY driver. */ switch (priv->phy_interface) { case PHY_INTERFACE_MODE_RGMII: phy_iface = PHY_INTERFACE_MODE_RGMII_ID; break; case PHY_INTERFACE_MODE_RGMII_TXID: phy_iface = PHY_INTERFACE_MODE_RGMII_RXID; break; default: break; } if (dn) { phydev = of_phy_connect(dev, priv->phy_dn, bcmgenet_mii_setup, phy_flags, phy_iface); if (!phydev) { pr_err("could not attach to PHY\n"); return -ENODEV; } } else { if (has_acpi_companion(kdev)) { char mdio_bus_id[MII_BUS_ID_SIZE]; struct mii_bus *unimacbus; snprintf(mdio_bus_id, MII_BUS_ID_SIZE, "%s-%d", UNIMAC_MDIO_DRV_NAME, priv->pdev->id); unimacbus = mdio_find_bus(mdio_bus_id); if (!unimacbus) { pr_err("Unable to find mii\n"); return -ENODEV; } phydev = phy_find_first(unimacbus); put_device(&unimacbus->dev); if (!phydev) { pr_err("Unable to find PHY\n"); return -ENODEV; } } else { phydev = dev->phydev; } phydev->dev_flags = phy_flags; ret = phy_connect_direct(dev, phydev, bcmgenet_mii_setup, phy_iface); if (ret) { pr_err("could not attach to PHY\n"); return -ENODEV; } } /* Configure port multiplexer based on what the probed PHY device since * reading the 'max-speed' property determines the maximum supported * PHY speed which is needed for bcmgenet_mii_config() to configure * things appropriately. */ ret = bcmgenet_mii_config(dev, true); if (ret) { phy_disconnect(dev->phydev); return ret; } /* The internal PHY has its link interrupts routed to the * Ethernet MAC ISRs. On GENETv5 there is a hardware issue * that prevents the signaling of link UP interrupts when * the link operates at 10Mbps, so fallback to polling for * those versions of GENET. */ if (priv->internal_phy && !GENET_IS_V5(priv)) dev->phydev->irq = PHY_MAC_INTERRUPT; /* Indicate that the MAC is responsible for PHY PM */ dev->phydev->mac_managed_pm = true; return 0; } static struct device_node *bcmgenet_mii_of_find_mdio(struct bcmgenet_priv *priv) { struct device_node *dn = priv->pdev->dev.of_node; struct device *kdev = &priv->pdev->dev; char *compat; compat = kasprintf(GFP_KERNEL, "brcm,genet-mdio-v%d", priv->version); if (!compat) return NULL; priv->mdio_dn = of_get_compatible_child(dn, compat); kfree(compat); if (!priv->mdio_dn) { dev_err(kdev, "unable to find MDIO bus node\n"); return NULL; } return priv->mdio_dn; } static void bcmgenet_mii_pdata_init(struct bcmgenet_priv *priv, struct unimac_mdio_pdata *ppd) { struct device *kdev = &priv->pdev->dev; struct bcmgenet_platform_data *pd = kdev->platform_data; if (pd->phy_interface != PHY_INTERFACE_MODE_MOCA && pd->mdio_enabled) { /* * Internal or external PHY with MDIO access */ if (pd->phy_address >= 0 && pd->phy_address < PHY_MAX_ADDR) ppd->phy_mask = 1 << pd->phy_address; else ppd->phy_mask = 0; } } static int bcmgenet_mii_wait(void *wait_func_data) { struct bcmgenet_priv *priv = wait_func_data; wait_event_timeout(priv->wq, !(bcmgenet_umac_readl(priv, UMAC_MDIO_CMD) & MDIO_START_BUSY), HZ / 100); return 0; } static int bcmgenet_mii_register(struct bcmgenet_priv *priv) { struct platform_device *pdev = priv->pdev; struct bcmgenet_platform_data *pdata = pdev->dev.platform_data; struct device_node *dn = pdev->dev.of_node; struct unimac_mdio_pdata ppd; struct platform_device *ppdev; struct resource *pres, res; int id, ret; pres = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!pres) { dev_err(&pdev->dev, "Invalid resource\n"); return -EINVAL; } memset(&res, 0, sizeof(res)); memset(&ppd, 0, sizeof(ppd)); ppd.wait_func = bcmgenet_mii_wait; ppd.wait_func_data = priv; ppd.bus_name = "bcmgenet MII bus"; /* Unimac MDIO bus controller starts at UniMAC offset + MDIO_CMD * and is 2 * 32-bits word long, 8 bytes total. */ res.start = pres->start + GENET_UMAC_OFF + UMAC_MDIO_CMD; res.end = res.start + 8; res.flags = IORESOURCE_MEM; if (dn) id = of_alias_get_id(dn, "eth"); else id = pdev->id; ppdev = platform_device_alloc(UNIMAC_MDIO_DRV_NAME, id); if (!ppdev) return -ENOMEM; /* Retain this platform_device pointer for later cleanup */ priv->mii_pdev = ppdev; ppdev->dev.parent = &pdev->dev; if (dn) ppdev->dev.of_node = bcmgenet_mii_of_find_mdio(priv); else if (pdata) bcmgenet_mii_pdata_init(priv, &ppd); else ppd.phy_mask = ~0; ret = platform_device_add_resources(ppdev, &res, 1); if (ret) goto out; ret = platform_device_add_data(ppdev, &ppd, sizeof(ppd)); if (ret) goto out; ret = platform_device_add(ppdev); if (ret) goto out; return 0; out: platform_device_put(ppdev); return ret; } static int bcmgenet_phy_interface_init(struct bcmgenet_priv *priv) { struct device *kdev = &priv->pdev->dev; int phy_mode = device_get_phy_mode(kdev); if (phy_mode < 0) { dev_err(kdev, "invalid PHY mode property\n"); return phy_mode; } priv->phy_interface = phy_mode; /* We need to specifically look up whether this PHY interface is * internal or not *before* we even try to probe the PHY driver * over MDIO as we may have shut down the internal PHY for power * saving purposes. */ if (priv->phy_interface == PHY_INTERFACE_MODE_INTERNAL) priv->internal_phy = true; return 0; } static int bcmgenet_mii_of_init(struct bcmgenet_priv *priv) { struct device_node *dn = priv->pdev->dev.of_node; struct phy_device *phydev; int ret; /* Fetch the PHY phandle */ priv->phy_dn = of_parse_phandle(dn, "phy-handle", 0); /* In the case of a fixed PHY, the DT node associated * to the PHY is the Ethernet MAC DT node. */ if (!priv->phy_dn && of_phy_is_fixed_link(dn)) { ret = of_phy_register_fixed_link(dn); if (ret) return ret; priv->phy_dn = of_node_get(dn); } /* Get the link mode */ ret = bcmgenet_phy_interface_init(priv); if (ret) return ret; /* Make sure we initialize MoCA PHYs with a link down */ if (priv->phy_interface == PHY_INTERFACE_MODE_MOCA) { phydev = of_phy_find_device(dn); if (phydev) { phydev->link = 0; put_device(&phydev->mdio.dev); } } return 0; } static int bcmgenet_mii_pd_init(struct bcmgenet_priv *priv) { struct device *kdev = &priv->pdev->dev; struct bcmgenet_platform_data *pd = kdev->platform_data; char phy_name[MII_BUS_ID_SIZE + 3]; char mdio_bus_id[MII_BUS_ID_SIZE]; struct phy_device *phydev; snprintf(mdio_bus_id, MII_BUS_ID_SIZE, "%s-%d", UNIMAC_MDIO_DRV_NAME, priv->pdev->id); if (pd->phy_interface != PHY_INTERFACE_MODE_MOCA && pd->mdio_enabled) { snprintf(phy_name, MII_BUS_ID_SIZE, PHY_ID_FMT, mdio_bus_id, pd->phy_address); /* * Internal or external PHY with MDIO access */ phydev = phy_attach(priv->dev, phy_name, pd->phy_interface); if (IS_ERR(phydev)) { dev_err(kdev, "failed to register PHY device\n"); return PTR_ERR(phydev); } } else { /* * MoCA port or no MDIO access. * Use fixed PHY to represent the link layer. */ struct fixed_phy_status fphy_status = { .link = 1, .speed = pd->phy_speed, .duplex = pd->phy_duplex, .pause = 0, .asym_pause = 0, }; phydev = fixed_phy_register(PHY_POLL, &fphy_status, NULL); if (!phydev || IS_ERR(phydev)) { dev_err(kdev, "failed to register fixed PHY device\n"); return -ENODEV; } /* Make sure we initialize MoCA PHYs with a link down */ phydev->link = 0; } priv->phy_interface = pd->phy_interface; return 0; } static int bcmgenet_mii_bus_init(struct bcmgenet_priv *priv) { struct device *kdev = &priv->pdev->dev; struct device_node *dn = kdev->of_node; if (dn) return bcmgenet_mii_of_init(priv); else if (has_acpi_companion(kdev)) return bcmgenet_phy_interface_init(priv); else return bcmgenet_mii_pd_init(priv); } int bcmgenet_mii_init(struct net_device *dev) { struct bcmgenet_priv *priv = netdev_priv(dev); int ret; ret = bcmgenet_mii_register(priv); if (ret) return ret; ret = bcmgenet_mii_bus_init(priv); if (ret) goto out; return 0; out: bcmgenet_mii_exit(dev); return ret; } void bcmgenet_mii_exit(struct net_device *dev) { struct bcmgenet_priv *priv = netdev_priv(dev); struct device_node *dn = priv->pdev->dev.of_node; if (of_phy_is_fixed_link(dn)) of_phy_deregister_fixed_link(dn); of_node_put(priv->phy_dn); platform_device_unregister(priv->mii_pdev); }
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