1 // SPDX-License-Identifier: GPL-2.0+ 2 // Copyright (c) 2016-2017 Hisilicon Limited. 3 4 #include <linux/etherdevice.h> 5 #include <linux/kernel.h> 6 #include <linux/marvell_phy.h> 7 8 #include "hclge_cmd.h" 9 #include "hclge_main.h" 10 #include "hclge_mdio.h" 11 12 enum hclge_mdio_c22_op_seq { 13 HCLGE_MDIO_C22_WRITE = 1, 14 HCLGE_MDIO_C22_READ = 2 15 }; 16 17 #define HCLGE_MDIO_CTRL_START_B 0 18 #define HCLGE_MDIO_CTRL_ST_S 1 19 #define HCLGE_MDIO_CTRL_ST_M (0x3 << HCLGE_MDIO_CTRL_ST_S) 20 #define HCLGE_MDIO_CTRL_OP_S 3 21 #define HCLGE_MDIO_CTRL_OP_M (0x3 << HCLGE_MDIO_CTRL_OP_S) 22 23 #define HCLGE_MDIO_PHYID_S 0 24 #define HCLGE_MDIO_PHYID_M (0x1f << HCLGE_MDIO_PHYID_S) 25 26 #define HCLGE_MDIO_PHYREG_S 0 27 #define HCLGE_MDIO_PHYREG_M (0x1f << HCLGE_MDIO_PHYREG_S) 28 29 #define HCLGE_MDIO_STA_B 0 30 31 struct hclge_mdio_cfg_cmd { 32 u8 ctrl_bit; 33 u8 phyid; 34 u8 phyad; 35 u8 rsvd; 36 __le16 reserve; 37 __le16 data_wr; 38 __le16 data_rd; 39 __le16 sta; 40 }; 41 42 static int hclge_mdio_write(struct mii_bus *bus, int phyid, int regnum, 43 u16 data) 44 { 45 struct hclge_mdio_cfg_cmd *mdio_cmd; 46 struct hclge_dev *hdev = bus->priv; 47 struct hclge_desc desc; 48 int ret; 49 50 if (test_bit(HCLGE_COMM_STATE_CMD_DISABLE, &hdev->hw.hw.comm_state)) 51 return -EBUSY; 52 53 hclge_cmd_setup_basic_desc(&desc, HCLGE_OPC_MDIO_CONFIG, false); 54 55 mdio_cmd = (struct hclge_mdio_cfg_cmd *)desc.data; 56 57 hnae3_set_field(mdio_cmd->phyid, HCLGE_MDIO_PHYID_M, 58 HCLGE_MDIO_PHYID_S, (u32)phyid); 59 hnae3_set_field(mdio_cmd->phyad, HCLGE_MDIO_PHYREG_M, 60 HCLGE_MDIO_PHYREG_S, (u32)regnum); 61 62 hnae3_set_bit(mdio_cmd->ctrl_bit, HCLGE_MDIO_CTRL_START_B, 1); 63 hnae3_set_field(mdio_cmd->ctrl_bit, HCLGE_MDIO_CTRL_ST_M, 64 HCLGE_MDIO_CTRL_ST_S, 1); 65 hnae3_set_field(mdio_cmd->ctrl_bit, HCLGE_MDIO_CTRL_OP_M, 66 HCLGE_MDIO_CTRL_OP_S, HCLGE_MDIO_C22_WRITE); 67 68 mdio_cmd->data_wr = cpu_to_le16(data); 69 70 ret = hclge_cmd_send(&hdev->hw, &desc, 1); 71 if (ret) { 72 dev_err(&hdev->pdev->dev, 73 "mdio write fail when sending cmd, status is %d.\n", 74 ret); 75 return ret; 76 } 77 78 return 0; 79 } 80 81 static int hclge_mdio_read(struct mii_bus *bus, int phyid, int regnum) 82 { 83 struct hclge_mdio_cfg_cmd *mdio_cmd; 84 struct hclge_dev *hdev = bus->priv; 85 struct hclge_desc desc; 86 int ret; 87 88 if (test_bit(HCLGE_COMM_STATE_CMD_DISABLE, &hdev->hw.hw.comm_state)) 89 return -EBUSY; 90 91 hclge_cmd_setup_basic_desc(&desc, HCLGE_OPC_MDIO_CONFIG, true); 92 93 mdio_cmd = (struct hclge_mdio_cfg_cmd *)desc.data; 94 95 hnae3_set_field(mdio_cmd->phyid, HCLGE_MDIO_PHYID_M, 96 HCLGE_MDIO_PHYID_S, (u32)phyid); 97 hnae3_set_field(mdio_cmd->phyad, HCLGE_MDIO_PHYREG_M, 98 HCLGE_MDIO_PHYREG_S, (u32)regnum); 99 100 hnae3_set_bit(mdio_cmd->ctrl_bit, HCLGE_MDIO_CTRL_START_B, 1); 101 hnae3_set_field(mdio_cmd->ctrl_bit, HCLGE_MDIO_CTRL_ST_M, 102 HCLGE_MDIO_CTRL_ST_S, 1); 103 hnae3_set_field(mdio_cmd->ctrl_bit, HCLGE_MDIO_CTRL_OP_M, 104 HCLGE_MDIO_CTRL_OP_S, HCLGE_MDIO_C22_READ); 105 106 /* Read out phy data */ 107 ret = hclge_cmd_send(&hdev->hw, &desc, 1); 108 if (ret) { 109 dev_err(&hdev->pdev->dev, 110 "mdio read fail when get data, status is %d.\n", 111 ret); 112 return ret; 113 } 114 115 if (hnae3_get_bit(le16_to_cpu(mdio_cmd->sta), HCLGE_MDIO_STA_B)) { 116 dev_err(&hdev->pdev->dev, "mdio read data error\n"); 117 return -EIO; 118 } 119 120 return le16_to_cpu(mdio_cmd->data_rd); 121 } 122 123 int hclge_mac_mdio_config(struct hclge_dev *hdev) 124 { 125 #define PHY_INEXISTENT 255 126 127 struct hclge_mac *mac = &hdev->hw.mac; 128 struct phy_device *phydev; 129 struct mii_bus *mdio_bus; 130 int ret; 131 132 if (hdev->hw.mac.phy_addr == PHY_INEXISTENT) { 133 dev_info(&hdev->pdev->dev, 134 "no phy device is connected to mdio bus\n"); 135 return 0; 136 } else if (hdev->hw.mac.phy_addr >= PHY_MAX_ADDR) { 137 dev_err(&hdev->pdev->dev, "phy_addr(%u) is too large.\n", 138 hdev->hw.mac.phy_addr); 139 return -EINVAL; 140 } 141 142 mdio_bus = devm_mdiobus_alloc(&hdev->pdev->dev); 143 if (!mdio_bus) 144 return -ENOMEM; 145 146 mdio_bus->name = "hisilicon MII bus"; 147 mdio_bus->read = hclge_mdio_read; 148 mdio_bus->write = hclge_mdio_write; 149 snprintf(mdio_bus->id, MII_BUS_ID_SIZE, "%s-%s", "mii", 150 dev_name(&hdev->pdev->dev)); 151 152 mdio_bus->parent = &hdev->pdev->dev; 153 mdio_bus->priv = hdev; 154 mdio_bus->phy_mask = ~(1 << mac->phy_addr); 155 ret = mdiobus_register(mdio_bus); 156 if (ret) { 157 dev_err(mdio_bus->parent, 158 "failed to register MDIO bus, ret = %d\n", ret); 159 return ret; 160 } 161 162 phydev = mdiobus_get_phy(mdio_bus, mac->phy_addr); 163 if (!phydev) { 164 dev_err(mdio_bus->parent, "Failed to get phy device\n"); 165 mdiobus_unregister(mdio_bus); 166 return -EIO; 167 } 168 169 mac->phydev = phydev; 170 mac->mdio_bus = mdio_bus; 171 172 return 0; 173 } 174 175 static void hclge_mac_adjust_link(struct net_device *netdev) 176 { 177 struct hnae3_handle *h = *((void **)netdev_priv(netdev)); 178 struct hclge_vport *vport = hclge_get_vport(h); 179 struct hclge_dev *hdev = vport->back; 180 int duplex, speed; 181 int ret; 182 183 /* When phy link down, do nothing */ 184 if (netdev->phydev->link == 0) 185 return; 186 187 speed = netdev->phydev->speed; 188 duplex = netdev->phydev->duplex; 189 190 ret = hclge_cfg_mac_speed_dup(hdev, speed, duplex, 0); 191 if (ret) 192 netdev_err(netdev, "failed to adjust link.\n"); 193 194 ret = hclge_cfg_flowctrl(hdev); 195 if (ret) 196 netdev_err(netdev, "failed to configure flow control.\n"); 197 } 198 199 int hclge_mac_connect_phy(struct hnae3_handle *handle) 200 { 201 struct hclge_vport *vport = hclge_get_vport(handle); 202 struct hclge_dev *hdev = vport->back; 203 struct net_device *netdev = hdev->vport[0].nic.netdev; 204 struct phy_device *phydev = hdev->hw.mac.phydev; 205 __ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, }; 206 int ret; 207 208 if (!phydev) 209 return 0; 210 211 linkmode_clear_bit(ETHTOOL_LINK_MODE_FIBRE_BIT, phydev->supported); 212 213 phydev->dev_flags |= MARVELL_PHY_LED0_LINK_LED1_ACTIVE; 214 215 ret = phy_connect_direct(netdev, phydev, 216 hclge_mac_adjust_link, 217 PHY_INTERFACE_MODE_SGMII); 218 if (ret) { 219 netdev_err(netdev, "phy_connect_direct err.\n"); 220 return ret; 221 } 222 223 linkmode_copy(mask, hdev->hw.mac.supported); 224 linkmode_and(phydev->supported, phydev->supported, mask); 225 linkmode_copy(phydev->advertising, phydev->supported); 226 227 /* supported flag is Pause and Asym Pause, but default advertising 228 * should be rx on, tx on, so need clear Asym Pause in advertising 229 * flag 230 */ 231 linkmode_clear_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, 232 phydev->advertising); 233 234 phy_attached_info(phydev); 235 236 return 0; 237 } 238 239 void hclge_mac_disconnect_phy(struct hnae3_handle *handle) 240 { 241 struct hclge_vport *vport = hclge_get_vport(handle); 242 struct hclge_dev *hdev = vport->back; 243 struct phy_device *phydev = hdev->hw.mac.phydev; 244 245 if (!phydev) 246 return; 247 248 phy_disconnect(phydev); 249 } 250 251 void hclge_mac_start_phy(struct hclge_dev *hdev) 252 { 253 struct phy_device *phydev = hdev->hw.mac.phydev; 254 255 if (!phydev) 256 return; 257 258 phy_loopback(phydev, false); 259 260 phy_start(phydev); 261 } 262 263 void hclge_mac_stop_phy(struct hclge_dev *hdev) 264 { 265 struct net_device *netdev = hdev->vport[0].nic.netdev; 266 struct phy_device *phydev = netdev->phydev; 267 268 if (!phydev) 269 return; 270 271 phy_stop(phydev); 272 } 273 274 u16 hclge_read_phy_reg(struct hclge_dev *hdev, u16 reg_addr) 275 { 276 struct hclge_phy_reg_cmd *req; 277 struct hclge_desc desc; 278 int ret; 279 280 hclge_cmd_setup_basic_desc(&desc, HCLGE_OPC_PHY_REG, true); 281 282 req = (struct hclge_phy_reg_cmd *)desc.data; 283 req->reg_addr = cpu_to_le16(reg_addr); 284 285 ret = hclge_cmd_send(&hdev->hw, &desc, 1); 286 if (ret) 287 dev_err(&hdev->pdev->dev, 288 "failed to read phy reg, ret = %d.\n", ret); 289 290 return le16_to_cpu(req->reg_val); 291 } 292 293 int hclge_write_phy_reg(struct hclge_dev *hdev, u16 reg_addr, u16 val) 294 { 295 struct hclge_phy_reg_cmd *req; 296 struct hclge_desc desc; 297 int ret; 298 299 hclge_cmd_setup_basic_desc(&desc, HCLGE_OPC_PHY_REG, false); 300 301 req = (struct hclge_phy_reg_cmd *)desc.data; 302 req->reg_addr = cpu_to_le16(reg_addr); 303 req->reg_val = cpu_to_le16(val); 304 305 ret = hclge_cmd_send(&hdev->hw, &desc, 1); 306 if (ret) 307 dev_err(&hdev->pdev->dev, 308 "failed to write phy reg, ret = %d.\n", ret); 309 310 return ret; 311 } 312