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
hclge_mdio_write(struct mii_bus * bus,int phyid,int regnum,u16 data)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
hclge_mdio_read(struct mii_bus * bus,int phyid,int regnum)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
hclge_mac_mdio_config(struct hclge_dev * hdev)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
hclge_mac_adjust_link(struct net_device * netdev)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 hdev->hw.mac.req_speed = (u32)speed;
195 hdev->hw.mac.req_duplex = (u8)duplex;
196
197 ret = hclge_cfg_flowctrl(hdev);
198 if (ret)
199 netdev_err(netdev, "failed to configure flow control.\n");
200 }
201
hclge_mac_connect_phy(struct hnae3_handle * handle)202 int hclge_mac_connect_phy(struct hnae3_handle *handle)
203 {
204 struct hclge_vport *vport = hclge_get_vport(handle);
205 struct hclge_dev *hdev = vport->back;
206 struct net_device *netdev = hdev->vport[0].nic.netdev;
207 struct phy_device *phydev = hdev->hw.mac.phydev;
208 __ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, };
209 int ret;
210
211 if (!phydev)
212 return 0;
213
214 linkmode_clear_bit(ETHTOOL_LINK_MODE_FIBRE_BIT, phydev->supported);
215
216 phydev->dev_flags |= MARVELL_PHY_LED0_LINK_LED1_ACTIVE;
217
218 ret = phy_connect_direct(netdev, phydev,
219 hclge_mac_adjust_link,
220 PHY_INTERFACE_MODE_SGMII);
221 if (ret) {
222 netdev_err(netdev, "phy_connect_direct err.\n");
223 return ret;
224 }
225
226 linkmode_copy(mask, hdev->hw.mac.supported);
227 linkmode_and(phydev->supported, phydev->supported, mask);
228 linkmode_copy(phydev->advertising, phydev->supported);
229
230 /* supported flag is Pause and Asym Pause, but default advertising
231 * should be rx on, tx on, so need clear Asym Pause in advertising
232 * flag
233 */
234 linkmode_clear_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
235 phydev->advertising);
236
237 phy_attached_info(phydev);
238
239 return 0;
240 }
241
hclge_mac_disconnect_phy(struct hnae3_handle * handle)242 void hclge_mac_disconnect_phy(struct hnae3_handle *handle)
243 {
244 struct hclge_vport *vport = hclge_get_vport(handle);
245 struct hclge_dev *hdev = vport->back;
246 struct phy_device *phydev = hdev->hw.mac.phydev;
247
248 if (!phydev)
249 return;
250
251 phy_disconnect(phydev);
252 }
253
hclge_mac_start_phy(struct hclge_dev * hdev)254 void hclge_mac_start_phy(struct hclge_dev *hdev)
255 {
256 struct phy_device *phydev = hdev->hw.mac.phydev;
257
258 if (!phydev)
259 return;
260
261 phy_loopback(phydev, false);
262
263 phy_start(phydev);
264 }
265
hclge_mac_stop_phy(struct hclge_dev * hdev)266 void hclge_mac_stop_phy(struct hclge_dev *hdev)
267 {
268 struct net_device *netdev = hdev->vport[0].nic.netdev;
269 struct phy_device *phydev = netdev->phydev;
270
271 if (!phydev)
272 return;
273
274 phy_stop(phydev);
275 }
276
hclge_read_phy_reg(struct hclge_dev * hdev,u16 reg_addr)277 u16 hclge_read_phy_reg(struct hclge_dev *hdev, u16 reg_addr)
278 {
279 struct hclge_phy_reg_cmd *req;
280 struct hclge_desc desc;
281 int ret;
282
283 hclge_cmd_setup_basic_desc(&desc, HCLGE_OPC_PHY_REG, true);
284
285 req = (struct hclge_phy_reg_cmd *)desc.data;
286 req->reg_addr = cpu_to_le16(reg_addr);
287
288 ret = hclge_cmd_send(&hdev->hw, &desc, 1);
289 if (ret)
290 dev_err(&hdev->pdev->dev,
291 "failed to read phy reg, ret = %d.\n", ret);
292
293 return le16_to_cpu(req->reg_val);
294 }
295
hclge_write_phy_reg(struct hclge_dev * hdev,u16 reg_addr,u16 val)296 int hclge_write_phy_reg(struct hclge_dev *hdev, u16 reg_addr, u16 val)
297 {
298 struct hclge_phy_reg_cmd *req;
299 struct hclge_desc desc;
300 int ret;
301
302 hclge_cmd_setup_basic_desc(&desc, HCLGE_OPC_PHY_REG, false);
303
304 req = (struct hclge_phy_reg_cmd *)desc.data;
305 req->reg_addr = cpu_to_le16(reg_addr);
306 req->reg_val = cpu_to_le16(val);
307
308 ret = hclge_cmd_send(&hdev->hw, &desc, 1);
309 if (ret)
310 dev_err(&hdev->pdev->dev,
311 "failed to write phy reg, ret = %d.\n", ret);
312
313 return ret;
314 }
315