Thomas Gleixner | 1ccea77 | 2019-05-19 15:51:43 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
Iyappan Subramanian | ea8ab16 | 2017-03-21 18:18:02 -0700 | [diff] [blame] | 2 | /* |
| 3 | * Applied Micro X-Gene SoC Ethernet v2 Driver |
| 4 | * |
| 5 | * Copyright (c) 2017, Applied Micro Circuits Corporation |
| 6 | * Author(s): Iyappan Subramanian <isubramanian@apm.com> |
| 7 | * Keyur Chudgar <kchudgar@apm.com> |
Iyappan Subramanian | ea8ab16 | 2017-03-21 18:18:02 -0700 | [diff] [blame] | 8 | */ |
| 9 | |
| 10 | #include "main.h" |
| 11 | |
| 12 | static int xge_mdio_write(struct mii_bus *bus, int phy_id, int reg, u16 data) |
| 13 | { |
| 14 | struct xge_pdata *pdata = bus->priv; |
| 15 | u32 done, val = 0; |
| 16 | u8 wait = 10; |
| 17 | |
| 18 | SET_REG_BITS(&val, PHY_ADDR, phy_id); |
| 19 | SET_REG_BITS(&val, REG_ADDR, reg); |
| 20 | xge_wr_csr(pdata, MII_MGMT_ADDRESS, val); |
| 21 | |
| 22 | xge_wr_csr(pdata, MII_MGMT_CONTROL, data); |
| 23 | do { |
| 24 | usleep_range(5, 10); |
| 25 | done = xge_rd_csr(pdata, MII_MGMT_INDICATORS); |
| 26 | } while ((done & MII_MGMT_BUSY) && wait--); |
| 27 | |
| 28 | if (done & MII_MGMT_BUSY) { |
| 29 | dev_err(&bus->dev, "MII_MGMT write failed\n"); |
| 30 | return -ETIMEDOUT; |
| 31 | } |
| 32 | |
| 33 | return 0; |
| 34 | } |
| 35 | |
| 36 | static int xge_mdio_read(struct mii_bus *bus, int phy_id, int reg) |
| 37 | { |
| 38 | struct xge_pdata *pdata = bus->priv; |
| 39 | u32 data, done, val = 0; |
| 40 | u8 wait = 10; |
| 41 | |
| 42 | SET_REG_BITS(&val, PHY_ADDR, phy_id); |
| 43 | SET_REG_BITS(&val, REG_ADDR, reg); |
| 44 | xge_wr_csr(pdata, MII_MGMT_ADDRESS, val); |
| 45 | |
| 46 | xge_wr_csr(pdata, MII_MGMT_COMMAND, MII_READ_CYCLE); |
| 47 | do { |
| 48 | usleep_range(5, 10); |
| 49 | done = xge_rd_csr(pdata, MII_MGMT_INDICATORS); |
| 50 | } while ((done & MII_MGMT_BUSY) && wait--); |
| 51 | |
| 52 | if (done & MII_MGMT_BUSY) { |
| 53 | dev_err(&bus->dev, "MII_MGMT read failed\n"); |
| 54 | return -ETIMEDOUT; |
| 55 | } |
| 56 | |
| 57 | data = xge_rd_csr(pdata, MII_MGMT_STATUS); |
| 58 | xge_wr_csr(pdata, MII_MGMT_COMMAND, 0); |
| 59 | |
| 60 | return data; |
| 61 | } |
| 62 | |
| 63 | static void xge_adjust_link(struct net_device *ndev) |
| 64 | { |
| 65 | struct xge_pdata *pdata = netdev_priv(ndev); |
| 66 | struct phy_device *phydev = ndev->phydev; |
| 67 | |
| 68 | if (phydev->link) { |
| 69 | if (pdata->phy_speed != phydev->speed) { |
| 70 | pdata->phy_speed = phydev->speed; |
| 71 | xge_mac_set_speed(pdata); |
| 72 | xge_mac_enable(pdata); |
| 73 | phy_print_status(phydev); |
| 74 | } |
| 75 | } else { |
| 76 | if (pdata->phy_speed != SPEED_UNKNOWN) { |
| 77 | pdata->phy_speed = SPEED_UNKNOWN; |
| 78 | xge_mac_disable(pdata); |
| 79 | phy_print_status(phydev); |
| 80 | } |
| 81 | } |
| 82 | } |
| 83 | |
| 84 | void xge_mdio_remove(struct net_device *ndev) |
| 85 | { |
| 86 | struct xge_pdata *pdata = netdev_priv(ndev); |
| 87 | struct mii_bus *mdio_bus = pdata->mdio_bus; |
| 88 | |
| 89 | if (ndev->phydev) |
| 90 | phy_disconnect(ndev->phydev); |
| 91 | |
| 92 | if (mdio_bus->state == MDIOBUS_REGISTERED) |
| 93 | mdiobus_unregister(mdio_bus); |
| 94 | |
| 95 | mdiobus_free(mdio_bus); |
| 96 | } |
| 97 | |
| 98 | int xge_mdio_config(struct net_device *ndev) |
| 99 | { |
Andrew Lunn | 3c1bcc8 | 2018-11-10 23:43:33 +0100 | [diff] [blame] | 100 | __ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, }; |
Iyappan Subramanian | ea8ab16 | 2017-03-21 18:18:02 -0700 | [diff] [blame] | 101 | struct xge_pdata *pdata = netdev_priv(ndev); |
| 102 | struct device *dev = &pdata->pdev->dev; |
| 103 | struct mii_bus *mdio_bus; |
| 104 | struct phy_device *phydev; |
| 105 | int ret; |
| 106 | |
| 107 | mdio_bus = mdiobus_alloc(); |
| 108 | if (!mdio_bus) |
| 109 | return -ENOMEM; |
| 110 | |
| 111 | mdio_bus->name = "APM X-Gene Ethernet (v2) MDIO Bus"; |
| 112 | mdio_bus->read = xge_mdio_read; |
| 113 | mdio_bus->write = xge_mdio_write; |
| 114 | mdio_bus->priv = pdata; |
| 115 | mdio_bus->parent = dev; |
| 116 | snprintf(mdio_bus->id, MII_BUS_ID_SIZE, "%s-mii", dev_name(dev)); |
| 117 | pdata->mdio_bus = mdio_bus; |
| 118 | |
| 119 | mdio_bus->phy_mask = 0x1; |
| 120 | ret = mdiobus_register(mdio_bus); |
| 121 | if (ret) |
| 122 | goto err; |
| 123 | |
| 124 | phydev = phy_find_first(mdio_bus); |
| 125 | if (!phydev) { |
| 126 | dev_err(dev, "no PHY found\n"); |
Wei Yongjun | 5e1fc7c | 2017-04-25 11:36:50 +0000 | [diff] [blame] | 127 | ret = -ENODEV; |
Iyappan Subramanian | ea8ab16 | 2017-03-21 18:18:02 -0700 | [diff] [blame] | 128 | goto err; |
| 129 | } |
| 130 | phydev = phy_connect(ndev, phydev_name(phydev), |
| 131 | &xge_adjust_link, |
| 132 | pdata->resources.phy_mode); |
| 133 | |
| 134 | if (IS_ERR(phydev)) { |
| 135 | netdev_err(ndev, "Could not attach to PHY\n"); |
| 136 | ret = PTR_ERR(phydev); |
| 137 | goto err; |
| 138 | } |
| 139 | |
Andrew Lunn | 3c1bcc8 | 2018-11-10 23:43:33 +0100 | [diff] [blame] | 140 | linkmode_set_bit_array(phy_10_100_features_array, |
| 141 | ARRAY_SIZE(phy_10_100_features_array), |
| 142 | mask); |
| 143 | linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, mask); |
| 144 | linkmode_set_bit(ETHTOOL_LINK_MODE_AUI_BIT, mask); |
| 145 | linkmode_set_bit(ETHTOOL_LINK_MODE_MII_BIT, mask); |
| 146 | linkmode_set_bit(ETHTOOL_LINK_MODE_FIBRE_BIT, mask); |
| 147 | linkmode_set_bit(ETHTOOL_LINK_MODE_BNC_BIT, mask); |
| 148 | |
| 149 | linkmode_andnot(phydev->supported, phydev->supported, mask); |
| 150 | linkmode_copy(phydev->advertising, phydev->supported); |
Iyappan Subramanian | ea8ab16 | 2017-03-21 18:18:02 -0700 | [diff] [blame] | 151 | pdata->phy_speed = SPEED_UNKNOWN; |
| 152 | |
| 153 | return 0; |
| 154 | err: |
| 155 | xge_mdio_remove(ndev); |
| 156 | |
| 157 | return ret; |
| 158 | } |