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);
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