From 8089a96f601bdfe3e1b41d14bb703aafaf1b8f34 Mon Sep 17 00:00:00 2001 From: Iyappan Subramanian Date: Mon, 25 Jul 2016 17:12:41 -0700 Subject: [PATCH] drivers: net: xgene: Add backward compatibility This patch adds xgene_enet_check_phy_hanlde() function that checks whether MDIO driver is probed successfully and sets pdata->mdio_driver to true. If MDIO driver is not probed, ethernet driver falls back to backward compatibility mode. Since enum xgene_enet_cmd is used by MDIO driver, removing this from ethernet driver. Signed-off-by: Iyappan Subramanian Tested-by: Fushen Chen Tested-by: Toan Le Signed-off-by: David S. Miller --- .../net/ethernet/apm/xgene/xgene_enet_hw.c | 57 +++++++++++++++++-- .../net/ethernet/apm/xgene/xgene_enet_hw.h | 7 +-- .../net/ethernet/apm/xgene/xgene_enet_main.c | 50 +++++++++++----- .../net/ethernet/apm/xgene/xgene_enet_main.h | 30 +--------- .../net/ethernet/apm/xgene/xgene_enet_sgmac.c | 9 ++- 5 files changed, 100 insertions(+), 53 deletions(-) diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c b/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c index 91a67a028548..b8b643f27361 100644 --- a/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c +++ b/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c @@ -572,7 +572,9 @@ static void xgene_gmac_init(struct xgene_enet_pdata *pdata) { u32 value; - xgene_gmac_reset(pdata); + if (!pdata->mdio_driver) + xgene_gmac_reset(pdata); + xgene_gmac_set_speed(pdata); xgene_gmac_set_mac_addr(pdata); @@ -680,6 +682,11 @@ static int xgene_enet_reset(struct xgene_enet_pdata *pdata) if (!xgene_ring_mgr_init(pdata)) return -ENODEV; + if (pdata->mdio_driver) { + xgene_enet_config_ring_if_assoc(pdata); + return 0; + } + if (dev->of_node) { clk_prepare_enable(pdata->clk); udelay(5); @@ -799,21 +806,47 @@ static void xgene_enet_adjust_link(struct net_device *ndev) } } -static int xgene_enet_phy_connect(struct net_device *ndev) +#ifdef CONFIG_ACPI +static struct acpi_device *acpi_phy_find_device(struct device *dev) +{ + struct acpi_reference_args args; + struct fwnode_handle *fw_node; + int status; + + fw_node = acpi_fwnode_handle(ACPI_COMPANION(dev)); + status = acpi_node_get_property_reference(fw_node, "phy-handle", 0, + &args); + if (ACPI_FAILURE(status)) { + dev_dbg(dev, "No matching phy in ACPI table\n"); + return NULL; + } + + return args.adev; +} +#endif + +int xgene_enet_phy_connect(struct net_device *ndev) { struct xgene_enet_pdata *pdata = netdev_priv(ndev); - struct device_node *phy_np; + struct device_node *np; struct phy_device *phy_dev; struct device *dev = &pdata->pdev->dev; + struct acpi_device *adev; + int i; if (dev->of_node) { - phy_np = of_parse_phandle(dev->of_node, "phy-handle", 0); - if (!phy_np) { + for (i = 0 ; i < 2; i++) { + np = of_parse_phandle(dev->of_node, "phy-handle", i); + if (np) + break; + } + + if (!np) { netdev_dbg(ndev, "No phy-handle found in DT\n"); return -ENODEV; } - phy_dev = of_phy_connect(ndev, phy_np, &xgene_enet_adjust_link, + phy_dev = of_phy_connect(ndev, np, &xgene_enet_adjust_link, 0, pdata->phy_mode); if (!phy_dev) { netdev_err(ndev, "Could not connect to PHY\n"); @@ -822,6 +855,11 @@ static int xgene_enet_phy_connect(struct net_device *ndev) pdata->phy_dev = phy_dev; } else { +#ifdef CONFIG_ACPI + adev = acpi_phy_find_device(dev); + if (adev) + pdata->phy_dev = adev->driver_data; + phy_dev = pdata->phy_dev; if (!phy_dev || @@ -830,6 +868,7 @@ static int xgene_enet_phy_connect(struct net_device *ndev) netdev_err(ndev, "Could not connect to PHY\n"); return -ENODEV; } +#endif } pdata->phy_speed = SPEED_UNKNOWN; @@ -930,6 +969,12 @@ int xgene_enet_mdio_config(struct xgene_enet_pdata *pdata) return ret; } +void xgene_enet_phy_disconnect(struct xgene_enet_pdata *pdata) +{ + if (pdata->phy_dev) + phy_disconnect(pdata->phy_dev); +} + void xgene_enet_mdio_remove(struct xgene_enet_pdata *pdata) { if (pdata->phy_dev) diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_hw.h b/drivers/net/ethernet/apm/xgene/xgene_enet_hw.h index eec55c1d41db..179a44dceb29 100644 --- a/drivers/net/ethernet/apm/xgene/xgene_enet_hw.h +++ b/drivers/net/ethernet/apm/xgene/xgene_enet_hw.h @@ -301,11 +301,6 @@ enum xgene_enet_ring_bufnum { RING_BUFNUM_INVALID }; -enum xgene_enet_cmd { - XGENE_ENET_WR_CMD = BIT(31), - XGENE_ENET_RD_CMD = BIT(30) -}; - enum xgene_enet_err_code { HBF_READ_DATA = 3, HBF_LL_READ = 4, @@ -351,6 +346,8 @@ void xgene_enet_parse_error(struct xgene_enet_desc_ring *ring, int xgene_enet_mdio_config(struct xgene_enet_pdata *pdata); void xgene_enet_mdio_remove(struct xgene_enet_pdata *pdata); bool xgene_ring_mgr_init(struct xgene_enet_pdata *p); +int xgene_enet_phy_connect(struct net_device *ndev); +void xgene_enet_phy_disconnect(struct xgene_enet_pdata *pdata); extern const struct xgene_mac_ops xgene_gmac_ops; extern const struct xgene_port_ops xgene_gport_ops; diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_main.c b/drivers/net/ethernet/apm/xgene/xgene_enet_main.c index 87e592955470..639833729d0a 100644 --- a/drivers/net/ethernet/apm/xgene/xgene_enet_main.c +++ b/drivers/net/ethernet/apm/xgene/xgene_enet_main.c @@ -763,7 +763,7 @@ static int xgene_enet_close(struct net_device *ndev) mac_ops->tx_disable(pdata); mac_ops->rx_disable(pdata); - if (pdata->phy_mode == PHY_INTERFACE_MODE_RGMII) + if (pdata->phy_dev) phy_stop(pdata->phy_dev); else cancel_delayed_work_sync(&pdata->link_work); @@ -1295,6 +1295,23 @@ static int xgene_enet_get_irqs(struct xgene_enet_pdata *pdata) return 0; } +static int xgene_enet_check_phy_handle(struct xgene_enet_pdata *pdata) +{ + int ret; + + if (pdata->phy_mode == PHY_INTERFACE_MODE_XGMII) + return 0; + + if (!IS_ENABLED(CONFIG_MDIO_XGENE)) + return 0; + + ret = xgene_enet_phy_connect(pdata->ndev); + if (!ret) + pdata->mdio_driver = true; + + return 0; +} + static int xgene_enet_get_resources(struct xgene_enet_pdata *pdata) { struct platform_device *pdev; @@ -1380,6 +1397,10 @@ static int xgene_enet_get_resources(struct xgene_enet_pdata *pdata) if (ret) return ret; + ret = xgene_enet_check_phy_handle(pdata); + if (ret) + return ret; + pdata->clk = devm_clk_get(&pdev->dev, NULL); if (IS_ERR(pdata->clk)) { /* Firmware may have set up the clock already. */ @@ -1574,7 +1595,7 @@ static int xgene_enet_probe(struct platform_device *pdev) struct net_device *ndev; struct xgene_enet_pdata *pdata; struct device *dev = &pdev->dev; - const struct xgene_mac_ops *mac_ops; + void (*link_state)(struct work_struct *); const struct of_device_id *of_id; int ret; @@ -1636,14 +1657,17 @@ static int xgene_enet_probe(struct platform_device *pdev) if (ret) goto err_netdev; - mac_ops = pdata->mac_ops; - if (pdata->phy_mode == PHY_INTERFACE_MODE_RGMII) { - ret = xgene_enet_mdio_config(pdata); - if (ret) - goto err_netdev; - } else { - INIT_DELAYED_WORK(&pdata->link_work, mac_ops->link_state); + link_state = pdata->mac_ops->link_state; + if (pdata->phy_mode == PHY_INTERFACE_MODE_XGMII) { + INIT_DELAYED_WORK(&pdata->link_work, link_state); + } else if (!pdata->mdio_driver) { + if (pdata->phy_mode == PHY_INTERFACE_MODE_RGMII) + ret = xgene_enet_mdio_config(pdata); + else + INIT_DELAYED_WORK(&pdata->link_work, link_state); } + if (ret) + goto err; xgene_enet_napi_add(pdata); ret = register_netdev(ndev); @@ -1676,11 +1700,11 @@ static int xgene_enet_remove(struct platform_device *pdev) dev_close(ndev); rtnl_unlock(); - mac_ops->rx_disable(pdata); - mac_ops->tx_disable(pdata); - - if (pdata->phy_mode == PHY_INTERFACE_MODE_RGMII) + if (pdata->mdio_driver) + xgene_enet_phy_disconnect(pdata); + else if (pdata->phy_mode == PHY_INTERFACE_MODE_RGMII) xgene_enet_mdio_remove(pdata); + unregister_netdev(ndev); pdata->port_ops->shutdown(pdata); xgene_enet_delete_desc_rings(pdata); diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_main.h b/drivers/net/ethernet/apm/xgene/xgene_enet_main.h index 681a47321fd8..217546e5714a 100644 --- a/drivers/net/ethernet/apm/xgene/xgene_enet_main.h +++ b/drivers/net/ethernet/apm/xgene/xgene_enet_main.h @@ -38,6 +38,7 @@ #include "xgene_enet_hw.h" #include "xgene_enet_cle.h" #include "xgene_enet_ring2.h" +#include "../../../phy/mdio-xgene.h" #define XGENE_DRV_VERSION "v1.0" #define XGENE_ENET_MAX_MTU 1536 @@ -214,6 +215,7 @@ struct xgene_enet_pdata { u32 mss; u8 tx_delay; u8 rx_delay; + bool mdio_driver; }; struct xgene_indirect_ctl { @@ -223,34 +225,6 @@ struct xgene_indirect_ctl { void __iomem *cmd_done; }; -/* Set the specified value into a bit-field defined by its starting position - * and length within a single u64. - */ -static inline u64 xgene_enet_set_field_value(int pos, int len, u64 val) -{ - return (val & ((1ULL << len) - 1)) << pos; -} - -#define SET_VAL(field, val) \ - xgene_enet_set_field_value(field ## _POS, field ## _LEN, val) - -#define SET_BIT(field) \ - xgene_enet_set_field_value(field ## _POS, 1, 1) - -/* Get the value from a bit-field defined by its starting position - * and length within the specified u64. - */ -static inline u64 xgene_enet_get_field_value(int pos, int len, u64 src) -{ - return (src >> pos) & ((1ULL << len) - 1); -} - -#define GET_VAL(field, src) \ - xgene_enet_get_field_value(field ## _POS, field ## _LEN, src) - -#define GET_BIT(field, src) \ - xgene_enet_get_field_value(field ## _POS, 1, src) - static inline struct device *ndev_to_dev(struct net_device *ndev) { return ndev->dev.parent; diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_sgmac.c b/drivers/net/ethernet/apm/xgene/xgene_enet_sgmac.c index 03a70c58bb9d..d12e9cbae820 100644 --- a/drivers/net/ethernet/apm/xgene/xgene_enet_sgmac.c +++ b/drivers/net/ethernet/apm/xgene/xgene_enet_sgmac.c @@ -366,7 +366,9 @@ static void xgene_sgmac_init(struct xgene_enet_pdata *p) u32 cfg_bypass_reg, rx_dv_gate_reg; u32 data, offset; - xgene_sgmac_reset(p); + if (!(p->enet_id == XGENE_ENET2 && p->mdio_driver)) + xgene_sgmac_reset(p); + xgene_sgmii_enable_autoneg(p); xgene_sgmac_set_speed(p); xgene_sgmac_set_mac_addr(p); @@ -445,6 +447,11 @@ static int xgene_enet_reset(struct xgene_enet_pdata *p) if (!xgene_ring_mgr_init(p)) return -ENODEV; + if (p->mdio_driver && p->enet_id == XGENE_ENET2) { + xgene_enet_config_ring_if_assoc(p); + return 0; + } + if (p->enet_id == XGENE_ENET2) xgene_enet_wr_clkrst_csr(p, XGENET_CONFIG_REG_ADDR, SGMII_EN);