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c5aa9e3b LT |
1 | /* |
2 | * AMD 10Gb Ethernet driver | |
3 | * | |
4 | * This file is available to you under your choice of the following two | |
5 | * licenses: | |
6 | * | |
7 | * License 1: GPLv2 | |
8 | * | |
9 | * Copyright (c) 2014 Advanced Micro Devices, Inc. | |
10 | * | |
11 | * This file is free software; you may copy, redistribute and/or modify | |
12 | * it under the terms of the GNU General Public License as published by | |
13 | * the Free Software Foundation, either version 2 of the License, or (at | |
14 | * your option) any later version. | |
15 | * | |
16 | * This file is distributed in the hope that it will be useful, but | |
17 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
19 | * General Public License for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License | |
22 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
23 | * | |
24 | * This file incorporates work covered by the following copyright and | |
25 | * permission notice: | |
26 | * The Synopsys DWC ETHER XGMAC Software Driver and documentation | |
27 | * (hereinafter "Software") is an unsupported proprietary work of Synopsys, | |
28 | * Inc. unless otherwise expressly agreed to in writing between Synopsys | |
29 | * and you. | |
30 | * | |
31 | * The Software IS NOT an item of Licensed Software or Licensed Product | |
32 | * under any End User Software License Agreement or Agreement for Licensed | |
33 | * Product with Synopsys or any supplement thereto. Permission is hereby | |
34 | * granted, free of charge, to any person obtaining a copy of this software | |
35 | * annotated with this license and the Software, to deal in the Software | |
36 | * without restriction, including without limitation the rights to use, | |
37 | * copy, modify, merge, publish, distribute, sublicense, and/or sell copies | |
38 | * of the Software, and to permit persons to whom the Software is furnished | |
39 | * to do so, subject to the following conditions: | |
40 | * | |
41 | * The above copyright notice and this permission notice shall be included | |
42 | * in all copies or substantial portions of the Software. | |
43 | * | |
44 | * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS" | |
45 | * BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED | |
46 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A | |
47 | * PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS | |
48 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
49 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
50 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
51 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
52 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
53 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF | |
54 | * THE POSSIBILITY OF SUCH DAMAGE. | |
55 | * | |
56 | * | |
57 | * License 2: Modified BSD | |
58 | * | |
59 | * Copyright (c) 2014 Advanced Micro Devices, Inc. | |
60 | * All rights reserved. | |
61 | * | |
62 | * Redistribution and use in source and binary forms, with or without | |
63 | * modification, are permitted provided that the following conditions are met: | |
64 | * * Redistributions of source code must retain the above copyright | |
65 | * notice, this list of conditions and the following disclaimer. | |
66 | * * Redistributions in binary form must reproduce the above copyright | |
67 | * notice, this list of conditions and the following disclaimer in the | |
68 | * documentation and/or other materials provided with the distribution. | |
69 | * * Neither the name of Advanced Micro Devices, Inc. nor the | |
70 | * names of its contributors may be used to endorse or promote products | |
71 | * derived from this software without specific prior written permission. | |
72 | * | |
73 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
74 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
75 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
76 | * ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY | |
77 | * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
78 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
79 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND | |
80 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
81 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
82 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
83 | * | |
84 | * This file incorporates work covered by the following copyright and | |
85 | * permission notice: | |
86 | * The Synopsys DWC ETHER XGMAC Software Driver and documentation | |
87 | * (hereinafter "Software") is an unsupported proprietary work of Synopsys, | |
88 | * Inc. unless otherwise expressly agreed to in writing between Synopsys | |
89 | * and you. | |
90 | * | |
91 | * The Software IS NOT an item of Licensed Software or Licensed Product | |
92 | * under any End User Software License Agreement or Agreement for Licensed | |
93 | * Product with Synopsys or any supplement thereto. Permission is hereby | |
94 | * granted, free of charge, to any person obtaining a copy of this software | |
95 | * annotated with this license and the Software, to deal in the Software | |
96 | * without restriction, including without limitation the rights to use, | |
97 | * copy, modify, merge, publish, distribute, sublicense, and/or sell copies | |
98 | * of the Software, and to permit persons to whom the Software is furnished | |
99 | * to do so, subject to the following conditions: | |
100 | * | |
101 | * The above copyright notice and this permission notice shall be included | |
102 | * in all copies or substantial portions of the Software. | |
103 | * | |
104 | * THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS" | |
105 | * BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED | |
106 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A | |
107 | * PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS | |
108 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
109 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
110 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
111 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
112 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
113 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF | |
114 | * THE POSSIBILITY OF SUCH DAMAGE. | |
115 | */ | |
116 | ||
117 | #include <linux/module.h> | |
118 | #include <linux/kmod.h> | |
c5aa9e3b LT |
119 | #include <linux/mdio.h> |
120 | #include <linux/phy.h> | |
121 | #include <linux/of.h> | |
122 | ||
123 | #include "xgbe.h" | |
124 | #include "xgbe-common.h" | |
125 | ||
c5aa9e3b LT |
126 | static int xgbe_mdio_read(struct mii_bus *mii, int prtad, int mmd_reg) |
127 | { | |
128 | struct xgbe_prv_data *pdata = mii->priv; | |
129 | struct xgbe_hw_if *hw_if = &pdata->hw_if; | |
130 | int mmd_data; | |
131 | ||
132 | DBGPR_MDIO("-->xgbe_mdio_read: prtad=%#x mmd_reg=%#x\n", | |
133 | prtad, mmd_reg); | |
134 | ||
135 | mmd_data = hw_if->read_mmd_regs(pdata, prtad, mmd_reg); | |
136 | ||
137 | DBGPR_MDIO("<--xgbe_mdio_read: mmd_data=%#x\n", mmd_data); | |
138 | ||
139 | return mmd_data; | |
140 | } | |
141 | ||
142 | static int xgbe_mdio_write(struct mii_bus *mii, int prtad, int mmd_reg, | |
143 | u16 mmd_val) | |
144 | { | |
145 | struct xgbe_prv_data *pdata = mii->priv; | |
146 | struct xgbe_hw_if *hw_if = &pdata->hw_if; | |
147 | int mmd_data = mmd_val; | |
148 | ||
149 | DBGPR_MDIO("-->xgbe_mdio_write: prtad=%#x mmd_reg=%#x mmd_data=%#x\n", | |
150 | prtad, mmd_reg, mmd_data); | |
151 | ||
152 | hw_if->write_mmd_regs(pdata, prtad, mmd_reg, mmd_data); | |
153 | ||
154 | DBGPR_MDIO("<--xgbe_mdio_write\n"); | |
155 | ||
156 | return 0; | |
157 | } | |
158 | ||
c5aa9e3b LT |
159 | void xgbe_dump_phy_registers(struct xgbe_prv_data *pdata) |
160 | { | |
161 | struct device *dev = pdata->dev; | |
162 | struct phy_device *phydev = pdata->mii->phy_map[XGBE_PRTAD]; | |
163 | int i; | |
164 | ||
165 | dev_alert(dev, "\n************* PHY Reg dump **********************\n"); | |
166 | ||
167 | dev_alert(dev, "PCS Control Reg (%#04x) = %#04x\n", MDIO_CTRL1, | |
168 | XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_CTRL1)); | |
169 | dev_alert(dev, "PCS Status Reg (%#04x) = %#04x\n", MDIO_STAT1, | |
170 | XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_STAT1)); | |
171 | dev_alert(dev, "Phy Id (PHYS ID 1 %#04x)= %#04x\n", MDIO_DEVID1, | |
172 | XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_DEVID1)); | |
173 | dev_alert(dev, "Phy Id (PHYS ID 2 %#04x)= %#04x\n", MDIO_DEVID2, | |
174 | XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_DEVID2)); | |
175 | dev_alert(dev, "Devices in Package (%#04x)= %#04x\n", MDIO_DEVS1, | |
176 | XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_DEVS1)); | |
177 | dev_alert(dev, "Devices in Package (%#04x)= %#04x\n", MDIO_DEVS2, | |
178 | XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_DEVS2)); | |
179 | ||
180 | dev_alert(dev, "Auto-Neg Control Reg (%#04x) = %#04x\n", MDIO_CTRL1, | |
181 | XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_CTRL1)); | |
182 | dev_alert(dev, "Auto-Neg Status Reg (%#04x) = %#04x\n", MDIO_STAT1, | |
183 | XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_STAT1)); | |
184 | dev_alert(dev, "Auto-Neg Ad Reg 1 (%#04x) = %#04x\n", | |
185 | MDIO_AN_ADVERTISE, | |
186 | XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE)); | |
187 | dev_alert(dev, "Auto-Neg Ad Reg 2 (%#04x) = %#04x\n", | |
188 | MDIO_AN_ADVERTISE + 1, | |
189 | XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE + 1)); | |
190 | dev_alert(dev, "Auto-Neg Ad Reg 3 (%#04x) = %#04x\n", | |
191 | MDIO_AN_ADVERTISE + 2, | |
192 | XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE + 2)); | |
193 | dev_alert(dev, "Auto-Neg Completion Reg (%#04x) = %#04x\n", | |
194 | MDIO_AN_COMP_STAT, | |
195 | XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_COMP_STAT)); | |
196 | ||
197 | dev_alert(dev, "MMD Device Mask = %#x\n", | |
198 | phydev->c45_ids.devices_in_package); | |
199 | for (i = 0; i < ARRAY_SIZE(phydev->c45_ids.device_ids); i++) | |
200 | dev_alert(dev, " MMD %d: ID = %#08x\n", i, | |
201 | phydev->c45_ids.device_ids[i]); | |
202 | ||
203 | dev_alert(dev, "\n*************************************************\n"); | |
204 | } | |
205 | ||
206 | int xgbe_mdio_register(struct xgbe_prv_data *pdata) | |
207 | { | |
c5aa9e3b LT |
208 | struct device_node *phy_node; |
209 | struct mii_bus *mii; | |
210 | struct phy_device *phydev; | |
211 | int ret = 0; | |
212 | ||
213 | DBGPR("-->xgbe_mdio_register\n"); | |
214 | ||
215 | /* Retrieve the phy-handle */ | |
216 | phy_node = of_parse_phandle(pdata->dev->of_node, "phy-handle", 0); | |
217 | if (!phy_node) { | |
218 | dev_err(pdata->dev, "unable to parse phy-handle\n"); | |
219 | return -EINVAL; | |
220 | } | |
221 | ||
c5aa9e3b | 222 | mii = mdiobus_alloc(); |
1d67d7f6 | 223 | if (!mii) { |
c5aa9e3b LT |
224 | dev_err(pdata->dev, "mdiobus_alloc failed\n"); |
225 | ret = -ENOMEM; | |
226 | goto err_node_get; | |
227 | } | |
228 | ||
229 | /* Register on the MDIO bus (don't probe any PHYs) */ | |
230 | mii->name = XGBE_PHY_NAME; | |
231 | mii->read = xgbe_mdio_read; | |
232 | mii->write = xgbe_mdio_write; | |
233 | snprintf(mii->id, sizeof(mii->id), "%s", pdata->mii_bus_id); | |
234 | mii->priv = pdata; | |
235 | mii->phy_mask = ~0; | |
236 | mii->parent = pdata->dev; | |
237 | ret = mdiobus_register(mii); | |
238 | if (ret) { | |
239 | dev_err(pdata->dev, "mdiobus_register failed\n"); | |
240 | goto err_mdiobus_alloc; | |
241 | } | |
242 | DBGPR(" mdiobus_register succeeded for %s\n", pdata->mii_bus_id); | |
243 | ||
244 | /* Probe the PCS using Clause 45 */ | |
245 | phydev = get_phy_device(mii, XGBE_PRTAD, true); | |
246 | if (IS_ERR(phydev) || !phydev || | |
247 | !phydev->c45_ids.device_ids[MDIO_MMD_PCS]) { | |
248 | dev_err(pdata->dev, "get_phy_device failed\n"); | |
249 | ret = phydev ? PTR_ERR(phydev) : -ENOLINK; | |
250 | goto err_mdiobus_register; | |
251 | } | |
252 | request_module(MDIO_MODULE_PREFIX MDIO_ID_FMT, | |
253 | MDIO_ID_ARGS(phydev->c45_ids.device_ids[MDIO_MMD_PCS])); | |
254 | ||
255 | of_node_get(phy_node); | |
256 | phydev->dev.of_node = phy_node; | |
257 | ret = phy_device_register(phydev); | |
258 | if (ret) { | |
259 | dev_err(pdata->dev, "phy_device_register failed\n"); | |
260 | of_node_put(phy_node); | |
261 | goto err_phy_device; | |
262 | } | |
263 | ||
264 | /* Add a reference to the PHY driver so it can't be unloaded */ | |
265 | pdata->phy_module = phydev->dev.driver ? | |
266 | phydev->dev.driver->owner : NULL; | |
267 | if (!try_module_get(pdata->phy_module)) { | |
268 | dev_err(pdata->dev, "try_module_get failed\n"); | |
269 | ret = -EIO; | |
270 | goto err_phy_device; | |
271 | } | |
272 | ||
273 | pdata->mii = mii; | |
274 | pdata->mdio_mmd = MDIO_MMD_PCS; | |
275 | ||
c5aa9e3b LT |
276 | phydev->autoneg = pdata->default_autoneg; |
277 | if (phydev->autoneg == AUTONEG_DISABLE) { | |
c5aa9e3b LT |
278 | phydev->speed = pdata->default_speed; |
279 | phydev->duplex = DUPLEX_FULL; | |
280 | ||
281 | phydev->advertising &= ~ADVERTISED_Autoneg; | |
282 | } | |
283 | ||
284 | pdata->phydev = phydev; | |
285 | ||
286 | of_node_put(phy_node); | |
287 | ||
288 | DBGPHY_REGS(pdata); | |
289 | ||
290 | DBGPR("<--xgbe_mdio_register\n"); | |
291 | ||
292 | return 0; | |
293 | ||
c5aa9e3b LT |
294 | err_phy_device: |
295 | phy_device_free(phydev); | |
296 | ||
297 | err_mdiobus_register: | |
298 | mdiobus_unregister(mii); | |
299 | ||
300 | err_mdiobus_alloc: | |
301 | mdiobus_free(mii); | |
302 | ||
303 | err_node_get: | |
304 | of_node_put(phy_node); | |
305 | ||
306 | return ret; | |
307 | } | |
308 | ||
309 | void xgbe_mdio_unregister(struct xgbe_prv_data *pdata) | |
310 | { | |
311 | DBGPR("-->xgbe_mdio_unregister\n"); | |
312 | ||
c5aa9e3b LT |
313 | pdata->phydev = NULL; |
314 | ||
315 | module_put(pdata->phy_module); | |
316 | pdata->phy_module = NULL; | |
317 | ||
318 | mdiobus_unregister(pdata->mii); | |
319 | pdata->mii->priv = NULL; | |
320 | ||
321 | mdiobus_free(pdata->mii); | |
322 | pdata->mii = NULL; | |
323 | ||
324 | DBGPR("<--xgbe_mdio_unregister\n"); | |
325 | } |