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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> | |
7c12aa08 LT |
122 | #include <linux/bitops.h> |
123 | #include <linux/jiffies.h> | |
c5aa9e3b LT |
124 | |
125 | #include "xgbe.h" | |
126 | #include "xgbe-common.h" | |
127 | ||
7c12aa08 | 128 | static void xgbe_an_enable_kr_training(struct xgbe_prv_data *pdata) |
c5aa9e3b | 129 | { |
7c12aa08 | 130 | unsigned int reg; |
c5aa9e3b | 131 | |
7c12aa08 | 132 | reg = XMDIO_READ(pdata, MDIO_MMD_PMAPMD, MDIO_PMA_10GBR_PMD_CTRL); |
c5aa9e3b | 133 | |
7c12aa08 LT |
134 | reg |= XGBE_KR_TRAINING_ENABLE; |
135 | XMDIO_WRITE(pdata, MDIO_MMD_PMAPMD, MDIO_PMA_10GBR_PMD_CTRL, reg); | |
136 | } | |
137 | ||
138 | static void xgbe_an_disable_kr_training(struct xgbe_prv_data *pdata) | |
139 | { | |
140 | unsigned int reg; | |
141 | ||
142 | reg = XMDIO_READ(pdata, MDIO_MMD_PMAPMD, MDIO_PMA_10GBR_PMD_CTRL); | |
143 | ||
144 | reg &= ~XGBE_KR_TRAINING_ENABLE; | |
145 | XMDIO_WRITE(pdata, MDIO_MMD_PMAPMD, MDIO_PMA_10GBR_PMD_CTRL, reg); | |
146 | } | |
147 | ||
148 | static void xgbe_pcs_power_cycle(struct xgbe_prv_data *pdata) | |
149 | { | |
150 | unsigned int reg; | |
151 | ||
152 | reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_CTRL1); | |
153 | ||
154 | reg |= MDIO_CTRL1_LPOWER; | |
155 | XMDIO_WRITE(pdata, MDIO_MMD_PCS, MDIO_CTRL1, reg); | |
156 | ||
157 | usleep_range(75, 100); | |
158 | ||
159 | reg &= ~MDIO_CTRL1_LPOWER; | |
160 | XMDIO_WRITE(pdata, MDIO_MMD_PCS, MDIO_CTRL1, reg); | |
161 | } | |
162 | ||
163 | static void xgbe_serdes_start_ratechange(struct xgbe_prv_data *pdata) | |
164 | { | |
165 | /* Assert Rx and Tx ratechange */ | |
166 | XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, RATECHANGE, 1); | |
167 | } | |
168 | ||
169 | static void xgbe_serdes_complete_ratechange(struct xgbe_prv_data *pdata) | |
170 | { | |
171 | unsigned int wait; | |
172 | u16 status; | |
173 | ||
174 | /* Release Rx and Tx ratechange */ | |
175 | XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, RATECHANGE, 0); | |
176 | ||
177 | /* Wait for Rx and Tx ready */ | |
178 | wait = XGBE_RATECHANGE_COUNT; | |
179 | while (wait--) { | |
180 | usleep_range(50, 75); | |
181 | ||
182 | status = XSIR0_IOREAD(pdata, SIR0_STATUS); | |
183 | if (XSIR_GET_BITS(status, SIR0_STATUS, RX_READY) && | |
184 | XSIR_GET_BITS(status, SIR0_STATUS, TX_READY)) | |
185 | goto rx_reset; | |
186 | } | |
187 | ||
188 | netdev_dbg(pdata->netdev, "SerDes rx/tx not ready (%#hx)\n", | |
189 | status); | |
190 | ||
191 | rx_reset: | |
192 | /* Perform Rx reset for the DFE changes */ | |
193 | XRXTX_IOWRITE_BITS(pdata, RXTX_REG6, RESETB_RXD, 0); | |
194 | XRXTX_IOWRITE_BITS(pdata, RXTX_REG6, RESETB_RXD, 1); | |
195 | } | |
196 | ||
197 | static void xgbe_xgmii_mode(struct xgbe_prv_data *pdata) | |
198 | { | |
199 | unsigned int reg; | |
200 | ||
201 | /* Enable KR training */ | |
202 | xgbe_an_enable_kr_training(pdata); | |
203 | ||
204 | /* Set MAC to 10G speed */ | |
205 | pdata->hw_if.set_xgmii_speed(pdata); | |
206 | ||
207 | /* Set PCS to KR/10G speed */ | |
208 | reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_CTRL2); | |
209 | reg &= ~MDIO_PCS_CTRL2_TYPE; | |
210 | reg |= MDIO_PCS_CTRL2_10GBR; | |
211 | XMDIO_WRITE(pdata, MDIO_MMD_PCS, MDIO_CTRL2, reg); | |
212 | ||
213 | reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_CTRL1); | |
214 | reg &= ~MDIO_CTRL1_SPEEDSEL; | |
215 | reg |= MDIO_CTRL1_SPEED10G; | |
216 | XMDIO_WRITE(pdata, MDIO_MMD_PCS, MDIO_CTRL1, reg); | |
217 | ||
218 | xgbe_pcs_power_cycle(pdata); | |
219 | ||
220 | /* Set SerDes to 10G speed */ | |
221 | xgbe_serdes_start_ratechange(pdata); | |
222 | ||
223 | XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, DATARATE, XGBE_SPEED_10000_RATE); | |
224 | XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, WORDMODE, XGBE_SPEED_10000_WORD); | |
225 | XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, PLLSEL, XGBE_SPEED_10000_PLL); | |
226 | ||
227 | XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, CDR_RATE, | |
228 | pdata->serdes_cdr_rate[XGBE_SPEED_10000]); | |
229 | XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, TXAMP, | |
230 | pdata->serdes_tx_amp[XGBE_SPEED_10000]); | |
231 | XRXTX_IOWRITE_BITS(pdata, RXTX_REG20, BLWC_ENA, | |
232 | pdata->serdes_blwc[XGBE_SPEED_10000]); | |
233 | XRXTX_IOWRITE_BITS(pdata, RXTX_REG114, PQ_REG, | |
234 | pdata->serdes_pq_skew[XGBE_SPEED_10000]); | |
235 | XRXTX_IOWRITE_BITS(pdata, RXTX_REG129, RXDFE_CONFIG, | |
236 | pdata->serdes_dfe_tap_cfg[XGBE_SPEED_10000]); | |
237 | XRXTX_IOWRITE(pdata, RXTX_REG22, | |
238 | pdata->serdes_dfe_tap_ena[XGBE_SPEED_10000]); | |
239 | ||
240 | xgbe_serdes_complete_ratechange(pdata); | |
241 | } | |
242 | ||
243 | static void xgbe_gmii_2500_mode(struct xgbe_prv_data *pdata) | |
244 | { | |
245 | unsigned int reg; | |
246 | ||
247 | /* Disable KR training */ | |
248 | xgbe_an_disable_kr_training(pdata); | |
249 | ||
250 | /* Set MAC to 2.5G speed */ | |
251 | pdata->hw_if.set_gmii_2500_speed(pdata); | |
252 | ||
253 | /* Set PCS to KX/1G speed */ | |
254 | reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_CTRL2); | |
255 | reg &= ~MDIO_PCS_CTRL2_TYPE; | |
256 | reg |= MDIO_PCS_CTRL2_10GBX; | |
257 | XMDIO_WRITE(pdata, MDIO_MMD_PCS, MDIO_CTRL2, reg); | |
258 | ||
259 | reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_CTRL1); | |
260 | reg &= ~MDIO_CTRL1_SPEEDSEL; | |
261 | reg |= MDIO_CTRL1_SPEED1G; | |
262 | XMDIO_WRITE(pdata, MDIO_MMD_PCS, MDIO_CTRL1, reg); | |
263 | ||
264 | xgbe_pcs_power_cycle(pdata); | |
265 | ||
266 | /* Set SerDes to 2.5G speed */ | |
267 | xgbe_serdes_start_ratechange(pdata); | |
268 | ||
269 | XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, DATARATE, XGBE_SPEED_2500_RATE); | |
270 | XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, WORDMODE, XGBE_SPEED_2500_WORD); | |
271 | XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, PLLSEL, XGBE_SPEED_2500_PLL); | |
272 | ||
273 | XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, CDR_RATE, | |
274 | pdata->serdes_cdr_rate[XGBE_SPEED_2500]); | |
275 | XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, TXAMP, | |
276 | pdata->serdes_tx_amp[XGBE_SPEED_2500]); | |
277 | XRXTX_IOWRITE_BITS(pdata, RXTX_REG20, BLWC_ENA, | |
278 | pdata->serdes_blwc[XGBE_SPEED_2500]); | |
279 | XRXTX_IOWRITE_BITS(pdata, RXTX_REG114, PQ_REG, | |
280 | pdata->serdes_pq_skew[XGBE_SPEED_2500]); | |
281 | XRXTX_IOWRITE_BITS(pdata, RXTX_REG129, RXDFE_CONFIG, | |
282 | pdata->serdes_dfe_tap_cfg[XGBE_SPEED_2500]); | |
283 | XRXTX_IOWRITE(pdata, RXTX_REG22, | |
284 | pdata->serdes_dfe_tap_ena[XGBE_SPEED_2500]); | |
285 | ||
286 | xgbe_serdes_complete_ratechange(pdata); | |
287 | } | |
288 | ||
289 | static void xgbe_gmii_mode(struct xgbe_prv_data *pdata) | |
290 | { | |
291 | unsigned int reg; | |
292 | ||
293 | /* Disable KR training */ | |
294 | xgbe_an_disable_kr_training(pdata); | |
295 | ||
296 | /* Set MAC to 1G speed */ | |
297 | pdata->hw_if.set_gmii_speed(pdata); | |
298 | ||
299 | /* Set PCS to KX/1G speed */ | |
300 | reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_CTRL2); | |
301 | reg &= ~MDIO_PCS_CTRL2_TYPE; | |
302 | reg |= MDIO_PCS_CTRL2_10GBX; | |
303 | XMDIO_WRITE(pdata, MDIO_MMD_PCS, MDIO_CTRL2, reg); | |
304 | ||
305 | reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_CTRL1); | |
306 | reg &= ~MDIO_CTRL1_SPEEDSEL; | |
307 | reg |= MDIO_CTRL1_SPEED1G; | |
308 | XMDIO_WRITE(pdata, MDIO_MMD_PCS, MDIO_CTRL1, reg); | |
309 | ||
310 | xgbe_pcs_power_cycle(pdata); | |
311 | ||
312 | /* Set SerDes to 1G speed */ | |
313 | xgbe_serdes_start_ratechange(pdata); | |
314 | ||
315 | XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, DATARATE, XGBE_SPEED_1000_RATE); | |
316 | XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, WORDMODE, XGBE_SPEED_1000_WORD); | |
317 | XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, PLLSEL, XGBE_SPEED_1000_PLL); | |
318 | ||
319 | XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, CDR_RATE, | |
320 | pdata->serdes_cdr_rate[XGBE_SPEED_1000]); | |
321 | XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, TXAMP, | |
322 | pdata->serdes_tx_amp[XGBE_SPEED_1000]); | |
323 | XRXTX_IOWRITE_BITS(pdata, RXTX_REG20, BLWC_ENA, | |
324 | pdata->serdes_blwc[XGBE_SPEED_1000]); | |
325 | XRXTX_IOWRITE_BITS(pdata, RXTX_REG114, PQ_REG, | |
326 | pdata->serdes_pq_skew[XGBE_SPEED_1000]); | |
327 | XRXTX_IOWRITE_BITS(pdata, RXTX_REG129, RXDFE_CONFIG, | |
328 | pdata->serdes_dfe_tap_cfg[XGBE_SPEED_1000]); | |
329 | XRXTX_IOWRITE(pdata, RXTX_REG22, | |
330 | pdata->serdes_dfe_tap_ena[XGBE_SPEED_1000]); | |
331 | ||
332 | xgbe_serdes_complete_ratechange(pdata); | |
333 | } | |
334 | ||
335 | static void xgbe_cur_mode(struct xgbe_prv_data *pdata, | |
336 | enum xgbe_mode *mode) | |
337 | { | |
338 | unsigned int reg; | |
339 | ||
340 | reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_CTRL2); | |
341 | if ((reg & MDIO_PCS_CTRL2_TYPE) == MDIO_PCS_CTRL2_10GBR) | |
342 | *mode = XGBE_MODE_KR; | |
343 | else | |
344 | *mode = XGBE_MODE_KX; | |
345 | } | |
346 | ||
347 | static bool xgbe_in_kr_mode(struct xgbe_prv_data *pdata) | |
348 | { | |
349 | enum xgbe_mode mode; | |
350 | ||
351 | xgbe_cur_mode(pdata, &mode); | |
352 | ||
353 | return (mode == XGBE_MODE_KR); | |
354 | } | |
355 | ||
356 | static void xgbe_switch_mode(struct xgbe_prv_data *pdata) | |
357 | { | |
358 | /* If we are in KR switch to KX, and vice-versa */ | |
359 | if (xgbe_in_kr_mode(pdata)) { | |
360 | if (pdata->speed_set == XGBE_SPEEDSET_1000_10000) | |
361 | xgbe_gmii_mode(pdata); | |
362 | else | |
363 | xgbe_gmii_2500_mode(pdata); | |
364 | } else { | |
365 | xgbe_xgmii_mode(pdata); | |
366 | } | |
367 | } | |
368 | ||
369 | static void xgbe_set_mode(struct xgbe_prv_data *pdata, | |
370 | enum xgbe_mode mode) | |
371 | { | |
372 | enum xgbe_mode cur_mode; | |
373 | ||
374 | xgbe_cur_mode(pdata, &cur_mode); | |
375 | if (mode != cur_mode) | |
376 | xgbe_switch_mode(pdata); | |
377 | } | |
378 | ||
471e14b2 LT |
379 | static bool xgbe_use_xgmii_mode(struct xgbe_prv_data *pdata) |
380 | { | |
381 | if (pdata->phy.autoneg == AUTONEG_ENABLE) { | |
382 | if (pdata->phy.advertising & ADVERTISED_10000baseKR_Full) | |
383 | return true; | |
384 | } else { | |
385 | if (pdata->phy.speed == SPEED_10000) | |
386 | return true; | |
387 | } | |
388 | ||
389 | return false; | |
390 | } | |
391 | ||
392 | static bool xgbe_use_gmii_2500_mode(struct xgbe_prv_data *pdata) | |
393 | { | |
394 | if (pdata->phy.autoneg == AUTONEG_ENABLE) { | |
395 | if (pdata->phy.advertising & ADVERTISED_2500baseX_Full) | |
396 | return true; | |
397 | } else { | |
398 | if (pdata->phy.speed == SPEED_2500) | |
399 | return true; | |
400 | } | |
401 | ||
402 | return false; | |
403 | } | |
404 | ||
405 | static bool xgbe_use_gmii_mode(struct xgbe_prv_data *pdata) | |
406 | { | |
407 | if (pdata->phy.autoneg == AUTONEG_ENABLE) { | |
408 | if (pdata->phy.advertising & ADVERTISED_1000baseKX_Full) | |
409 | return true; | |
410 | } else { | |
411 | if (pdata->phy.speed == SPEED_1000) | |
412 | return true; | |
413 | } | |
414 | ||
415 | return false; | |
416 | } | |
417 | ||
7c12aa08 LT |
418 | static void xgbe_set_an(struct xgbe_prv_data *pdata, bool enable, bool restart) |
419 | { | |
420 | unsigned int reg; | |
421 | ||
422 | reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_CTRL1); | |
423 | reg &= ~MDIO_AN_CTRL1_ENABLE; | |
424 | ||
425 | if (enable) | |
426 | reg |= MDIO_AN_CTRL1_ENABLE; | |
427 | ||
428 | if (restart) | |
429 | reg |= MDIO_AN_CTRL1_RESTART; | |
430 | ||
431 | XMDIO_WRITE(pdata, MDIO_MMD_AN, MDIO_CTRL1, reg); | |
432 | } | |
433 | ||
434 | static void xgbe_restart_an(struct xgbe_prv_data *pdata) | |
435 | { | |
436 | xgbe_set_an(pdata, true, true); | |
437 | } | |
438 | ||
439 | static void xgbe_disable_an(struct xgbe_prv_data *pdata) | |
440 | { | |
441 | xgbe_set_an(pdata, false, false); | |
442 | } | |
443 | ||
444 | static enum xgbe_an xgbe_an_tx_training(struct xgbe_prv_data *pdata, | |
445 | enum xgbe_rx *state) | |
446 | { | |
447 | unsigned int ad_reg, lp_reg, reg; | |
448 | ||
449 | *state = XGBE_RX_COMPLETE; | |
450 | ||
451 | /* If we're not in KR mode then we're done */ | |
452 | if (!xgbe_in_kr_mode(pdata)) | |
453 | return XGBE_AN_PAGE_RECEIVED; | |
454 | ||
455 | /* Enable/Disable FEC */ | |
456 | ad_reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE + 2); | |
457 | lp_reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_LPA + 2); | |
458 | ||
459 | reg = XMDIO_READ(pdata, MDIO_MMD_PMAPMD, MDIO_PMA_10GBR_FECCTRL); | |
460 | reg &= ~(MDIO_PMA_10GBR_FECABLE_ABLE | MDIO_PMA_10GBR_FECABLE_ERRABLE); | |
461 | if ((ad_reg & 0xc000) && (lp_reg & 0xc000)) | |
462 | reg |= pdata->fec_ability; | |
463 | ||
464 | XMDIO_WRITE(pdata, MDIO_MMD_PMAPMD, MDIO_PMA_10GBR_FECCTRL, reg); | |
465 | ||
466 | /* Start KR training */ | |
467 | reg = XMDIO_READ(pdata, MDIO_MMD_PMAPMD, MDIO_PMA_10GBR_PMD_CTRL); | |
468 | if (reg & XGBE_KR_TRAINING_ENABLE) { | |
469 | XSIR0_IOWRITE_BITS(pdata, SIR0_KR_RT_1, RESET, 1); | |
470 | ||
471 | reg |= XGBE_KR_TRAINING_START; | |
472 | XMDIO_WRITE(pdata, MDIO_MMD_PMAPMD, MDIO_PMA_10GBR_PMD_CTRL, | |
473 | reg); | |
474 | ||
475 | XSIR0_IOWRITE_BITS(pdata, SIR0_KR_RT_1, RESET, 0); | |
476 | } | |
477 | ||
478 | return XGBE_AN_PAGE_RECEIVED; | |
479 | } | |
480 | ||
481 | static enum xgbe_an xgbe_an_tx_xnp(struct xgbe_prv_data *pdata, | |
482 | enum xgbe_rx *state) | |
483 | { | |
484 | u16 msg; | |
485 | ||
486 | *state = XGBE_RX_XNP; | |
487 | ||
488 | msg = XGBE_XNP_MCF_NULL_MESSAGE; | |
489 | msg |= XGBE_XNP_MP_FORMATTED; | |
490 | ||
491 | XMDIO_WRITE(pdata, MDIO_MMD_AN, MDIO_AN_XNP + 2, 0); | |
492 | XMDIO_WRITE(pdata, MDIO_MMD_AN, MDIO_AN_XNP + 1, 0); | |
493 | XMDIO_WRITE(pdata, MDIO_MMD_AN, MDIO_AN_XNP, msg); | |
494 | ||
495 | return XGBE_AN_PAGE_RECEIVED; | |
496 | } | |
497 | ||
498 | static enum xgbe_an xgbe_an_rx_bpa(struct xgbe_prv_data *pdata, | |
499 | enum xgbe_rx *state) | |
500 | { | |
501 | unsigned int link_support; | |
502 | unsigned int reg, ad_reg, lp_reg; | |
503 | ||
504 | /* Read Base Ability register 2 first */ | |
505 | reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_LPA + 1); | |
506 | ||
507 | /* Check for a supported mode, otherwise restart in a different one */ | |
508 | link_support = xgbe_in_kr_mode(pdata) ? 0x80 : 0x20; | |
509 | if (!(reg & link_support)) | |
510 | return XGBE_AN_INCOMPAT_LINK; | |
511 | ||
512 | /* Check Extended Next Page support */ | |
513 | ad_reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE); | |
514 | lp_reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_LPA); | |
515 | ||
516 | return ((ad_reg & XGBE_XNP_NP_EXCHANGE) || | |
517 | (lp_reg & XGBE_XNP_NP_EXCHANGE)) | |
518 | ? xgbe_an_tx_xnp(pdata, state) | |
519 | : xgbe_an_tx_training(pdata, state); | |
520 | } | |
521 | ||
522 | static enum xgbe_an xgbe_an_rx_xnp(struct xgbe_prv_data *pdata, | |
523 | enum xgbe_rx *state) | |
524 | { | |
525 | unsigned int ad_reg, lp_reg; | |
526 | ||
527 | /* Check Extended Next Page support */ | |
528 | ad_reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_XNP); | |
529 | lp_reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_LPX); | |
530 | ||
531 | return ((ad_reg & XGBE_XNP_NP_EXCHANGE) || | |
532 | (lp_reg & XGBE_XNP_NP_EXCHANGE)) | |
533 | ? xgbe_an_tx_xnp(pdata, state) | |
534 | : xgbe_an_tx_training(pdata, state); | |
535 | } | |
536 | ||
537 | static enum xgbe_an xgbe_an_page_received(struct xgbe_prv_data *pdata) | |
538 | { | |
539 | enum xgbe_rx *state; | |
540 | unsigned long an_timeout; | |
541 | enum xgbe_an ret; | |
542 | ||
543 | if (!pdata->an_start) { | |
544 | pdata->an_start = jiffies; | |
545 | } else { | |
546 | an_timeout = pdata->an_start + | |
547 | msecs_to_jiffies(XGBE_AN_MS_TIMEOUT); | |
548 | if (time_after(jiffies, an_timeout)) { | |
549 | /* Auto-negotiation timed out, reset state */ | |
550 | pdata->kr_state = XGBE_RX_BPA; | |
551 | pdata->kx_state = XGBE_RX_BPA; | |
552 | ||
553 | pdata->an_start = jiffies; | |
554 | } | |
555 | } | |
556 | ||
557 | state = xgbe_in_kr_mode(pdata) ? &pdata->kr_state | |
558 | : &pdata->kx_state; | |
559 | ||
560 | switch (*state) { | |
561 | case XGBE_RX_BPA: | |
562 | ret = xgbe_an_rx_bpa(pdata, state); | |
563 | break; | |
564 | ||
565 | case XGBE_RX_XNP: | |
566 | ret = xgbe_an_rx_xnp(pdata, state); | |
567 | break; | |
568 | ||
569 | default: | |
570 | ret = XGBE_AN_ERROR; | |
571 | } | |
572 | ||
573 | return ret; | |
574 | } | |
575 | ||
576 | static enum xgbe_an xgbe_an_incompat_link(struct xgbe_prv_data *pdata) | |
577 | { | |
578 | /* Be sure we aren't looping trying to negotiate */ | |
579 | if (xgbe_in_kr_mode(pdata)) { | |
580 | pdata->kr_state = XGBE_RX_ERROR; | |
581 | ||
582 | if (!(pdata->phy.advertising & ADVERTISED_1000baseKX_Full) && | |
583 | !(pdata->phy.advertising & ADVERTISED_2500baseX_Full)) | |
584 | return XGBE_AN_NO_LINK; | |
585 | ||
586 | if (pdata->kx_state != XGBE_RX_BPA) | |
587 | return XGBE_AN_NO_LINK; | |
588 | } else { | |
589 | pdata->kx_state = XGBE_RX_ERROR; | |
590 | ||
591 | if (!(pdata->phy.advertising & ADVERTISED_10000baseKR_Full)) | |
592 | return XGBE_AN_NO_LINK; | |
593 | ||
594 | if (pdata->kr_state != XGBE_RX_BPA) | |
595 | return XGBE_AN_NO_LINK; | |
596 | } | |
597 | ||
598 | xgbe_disable_an(pdata); | |
599 | ||
600 | xgbe_switch_mode(pdata); | |
601 | ||
602 | xgbe_restart_an(pdata); | |
603 | ||
604 | return XGBE_AN_INCOMPAT_LINK; | |
605 | } | |
606 | ||
607 | static irqreturn_t xgbe_an_isr(int irq, void *data) | |
608 | { | |
609 | struct xgbe_prv_data *pdata = (struct xgbe_prv_data *)data; | |
610 | ||
611 | /* Interrupt reason must be read and cleared outside of IRQ context */ | |
612 | disable_irq_nosync(pdata->an_irq); | |
613 | ||
614 | queue_work(pdata->an_workqueue, &pdata->an_irq_work); | |
615 | ||
616 | return IRQ_HANDLED; | |
617 | } | |
618 | ||
619 | static void xgbe_an_irq_work(struct work_struct *work) | |
620 | { | |
621 | struct xgbe_prv_data *pdata = container_of(work, | |
622 | struct xgbe_prv_data, | |
623 | an_irq_work); | |
624 | ||
625 | /* Avoid a race between enabling the IRQ and exiting the work by | |
626 | * waiting for the work to finish and then queueing it | |
627 | */ | |
628 | flush_work(&pdata->an_work); | |
629 | queue_work(pdata->an_workqueue, &pdata->an_work); | |
630 | } | |
631 | ||
632 | static void xgbe_an_state_machine(struct work_struct *work) | |
633 | { | |
634 | struct xgbe_prv_data *pdata = container_of(work, | |
635 | struct xgbe_prv_data, | |
636 | an_work); | |
637 | enum xgbe_an cur_state = pdata->an_state; | |
638 | unsigned int int_reg, int_mask; | |
639 | ||
640 | mutex_lock(&pdata->an_mutex); | |
641 | ||
642 | /* Read the interrupt */ | |
643 | int_reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_INT); | |
644 | if (!int_reg) | |
645 | goto out; | |
646 | ||
647 | next_int: | |
648 | if (int_reg & XGBE_AN_PG_RCV) { | |
649 | pdata->an_state = XGBE_AN_PAGE_RECEIVED; | |
650 | int_mask = XGBE_AN_PG_RCV; | |
651 | } else if (int_reg & XGBE_AN_INC_LINK) { | |
652 | pdata->an_state = XGBE_AN_INCOMPAT_LINK; | |
653 | int_mask = XGBE_AN_INC_LINK; | |
654 | } else if (int_reg & XGBE_AN_INT_CMPLT) { | |
655 | pdata->an_state = XGBE_AN_COMPLETE; | |
656 | int_mask = XGBE_AN_INT_CMPLT; | |
657 | } else { | |
658 | pdata->an_state = XGBE_AN_ERROR; | |
659 | int_mask = 0; | |
660 | } | |
661 | ||
662 | /* Clear the interrupt to be processed */ | |
663 | int_reg &= ~int_mask; | |
664 | XMDIO_WRITE(pdata, MDIO_MMD_AN, MDIO_AN_INT, int_reg); | |
665 | ||
666 | pdata->an_result = pdata->an_state; | |
667 | ||
668 | again: | |
669 | cur_state = pdata->an_state; | |
670 | ||
671 | switch (pdata->an_state) { | |
672 | case XGBE_AN_READY: | |
673 | pdata->an_supported = 0; | |
674 | break; | |
675 | ||
676 | case XGBE_AN_PAGE_RECEIVED: | |
677 | pdata->an_state = xgbe_an_page_received(pdata); | |
678 | pdata->an_supported++; | |
679 | break; | |
c5aa9e3b | 680 | |
7c12aa08 LT |
681 | case XGBE_AN_INCOMPAT_LINK: |
682 | pdata->an_supported = 0; | |
683 | pdata->parallel_detect = 0; | |
684 | pdata->an_state = xgbe_an_incompat_link(pdata); | |
685 | break; | |
c5aa9e3b | 686 | |
7c12aa08 LT |
687 | case XGBE_AN_COMPLETE: |
688 | pdata->parallel_detect = pdata->an_supported ? 0 : 1; | |
689 | netdev_dbg(pdata->netdev, "%s successful\n", | |
690 | pdata->an_supported ? "Auto negotiation" | |
691 | : "Parallel detection"); | |
692 | break; | |
693 | ||
694 | case XGBE_AN_NO_LINK: | |
695 | break; | |
696 | ||
697 | default: | |
698 | pdata->an_state = XGBE_AN_ERROR; | |
699 | } | |
700 | ||
701 | if (pdata->an_state == XGBE_AN_NO_LINK) { | |
702 | int_reg = 0; | |
703 | XMDIO_WRITE(pdata, MDIO_MMD_AN, MDIO_AN_INT, 0); | |
704 | } else if (pdata->an_state == XGBE_AN_ERROR) { | |
705 | netdev_err(pdata->netdev, | |
706 | "error during auto-negotiation, state=%u\n", | |
707 | cur_state); | |
708 | ||
709 | int_reg = 0; | |
710 | XMDIO_WRITE(pdata, MDIO_MMD_AN, MDIO_AN_INT, 0); | |
711 | } | |
712 | ||
713 | if (pdata->an_state >= XGBE_AN_COMPLETE) { | |
714 | pdata->an_result = pdata->an_state; | |
715 | pdata->an_state = XGBE_AN_READY; | |
716 | pdata->kr_state = XGBE_RX_BPA; | |
717 | pdata->kx_state = XGBE_RX_BPA; | |
718 | pdata->an_start = 0; | |
719 | } | |
720 | ||
721 | if (cur_state != pdata->an_state) | |
722 | goto again; | |
723 | ||
724 | if (int_reg) | |
725 | goto next_int; | |
726 | ||
727 | out: | |
728 | enable_irq(pdata->an_irq); | |
729 | ||
730 | mutex_unlock(&pdata->an_mutex); | |
c5aa9e3b LT |
731 | } |
732 | ||
7c12aa08 | 733 | static void xgbe_an_init(struct xgbe_prv_data *pdata) |
c5aa9e3b | 734 | { |
7c12aa08 LT |
735 | unsigned int reg; |
736 | ||
737 | /* Set up Advertisement register 3 first */ | |
738 | reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE + 2); | |
739 | if (pdata->phy.advertising & ADVERTISED_10000baseR_FEC) | |
740 | reg |= 0xc000; | |
741 | else | |
742 | reg &= ~0xc000; | |
743 | ||
744 | XMDIO_WRITE(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE + 2, reg); | |
745 | ||
746 | /* Set up Advertisement register 2 next */ | |
747 | reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE + 1); | |
748 | if (pdata->phy.advertising & ADVERTISED_10000baseKR_Full) | |
749 | reg |= 0x80; | |
750 | else | |
751 | reg &= ~0x80; | |
752 | ||
753 | if ((pdata->phy.advertising & ADVERTISED_1000baseKX_Full) || | |
754 | (pdata->phy.advertising & ADVERTISED_2500baseX_Full)) | |
755 | reg |= 0x20; | |
756 | else | |
757 | reg &= ~0x20; | |
758 | ||
759 | XMDIO_WRITE(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE + 1, reg); | |
c5aa9e3b | 760 | |
7c12aa08 LT |
761 | /* Set up Advertisement register 1 last */ |
762 | reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE); | |
763 | if (pdata->phy.advertising & ADVERTISED_Pause) | |
764 | reg |= 0x400; | |
765 | else | |
766 | reg &= ~0x400; | |
c5aa9e3b | 767 | |
7c12aa08 LT |
768 | if (pdata->phy.advertising & ADVERTISED_Asym_Pause) |
769 | reg |= 0x800; | |
770 | else | |
771 | reg &= ~0x800; | |
772 | ||
773 | /* We don't intend to perform XNP */ | |
774 | reg &= ~XGBE_XNP_NP_EXCHANGE; | |
775 | ||
776 | XMDIO_WRITE(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE, reg); | |
777 | } | |
778 | ||
c1ce2f77 LT |
779 | static const char *xgbe_phy_fc_string(struct xgbe_prv_data *pdata) |
780 | { | |
781 | if (pdata->tx_pause && pdata->rx_pause) | |
782 | return "rx/tx"; | |
783 | else if (pdata->rx_pause) | |
784 | return "rx"; | |
785 | else if (pdata->tx_pause) | |
786 | return "tx"; | |
787 | else | |
788 | return "off"; | |
789 | } | |
790 | ||
7c12aa08 LT |
791 | static const char *xgbe_phy_speed_string(int speed) |
792 | { | |
793 | switch (speed) { | |
794 | case SPEED_1000: | |
795 | return "1Gbps"; | |
796 | case SPEED_2500: | |
797 | return "2.5Gbps"; | |
798 | case SPEED_10000: | |
799 | return "10Gbps"; | |
800 | case SPEED_UNKNOWN: | |
801 | return "Unknown"; | |
802 | default: | |
803 | return "Unsupported"; | |
804 | } | |
805 | } | |
806 | ||
807 | static void xgbe_phy_print_status(struct xgbe_prv_data *pdata) | |
808 | { | |
809 | if (pdata->phy.link) | |
810 | netdev_info(pdata->netdev, | |
811 | "Link is Up - %s/%s - flow control %s\n", | |
812 | xgbe_phy_speed_string(pdata->phy.speed), | |
813 | pdata->phy.duplex == DUPLEX_FULL ? "Full" : "Half", | |
c1ce2f77 | 814 | xgbe_phy_fc_string(pdata)); |
7c12aa08 LT |
815 | else |
816 | netdev_info(pdata->netdev, "Link is Down\n"); | |
817 | } | |
818 | ||
819 | static void xgbe_phy_adjust_link(struct xgbe_prv_data *pdata) | |
820 | { | |
821 | int new_state = 0; | |
822 | ||
823 | if (pdata->phy.link) { | |
824 | /* Flow control support */ | |
c1ce2f77 | 825 | pdata->pause_autoneg = pdata->phy.pause_autoneg; |
7c12aa08 | 826 | |
c1ce2f77 LT |
827 | if (pdata->tx_pause != pdata->phy.tx_pause) { |
828 | new_state = 1; | |
7c12aa08 | 829 | pdata->hw_if.config_tx_flow_control(pdata); |
c1ce2f77 | 830 | pdata->tx_pause = pdata->phy.tx_pause; |
7c12aa08 LT |
831 | } |
832 | ||
c1ce2f77 LT |
833 | if (pdata->rx_pause != pdata->phy.rx_pause) { |
834 | new_state = 1; | |
7c12aa08 | 835 | pdata->hw_if.config_rx_flow_control(pdata); |
c1ce2f77 | 836 | pdata->rx_pause = pdata->phy.rx_pause; |
7c12aa08 LT |
837 | } |
838 | ||
839 | /* Speed support */ | |
840 | if (pdata->phy_speed != pdata->phy.speed) { | |
841 | new_state = 1; | |
842 | pdata->phy_speed = pdata->phy.speed; | |
843 | } | |
844 | ||
845 | if (pdata->phy_link != pdata->phy.link) { | |
846 | new_state = 1; | |
847 | pdata->phy_link = pdata->phy.link; | |
848 | } | |
849 | } else if (pdata->phy_link) { | |
850 | new_state = 1; | |
851 | pdata->phy_link = 0; | |
852 | pdata->phy_speed = SPEED_UNKNOWN; | |
853 | } | |
854 | ||
855 | if (new_state && netif_msg_link(pdata)) | |
856 | xgbe_phy_print_status(pdata); | |
857 | } | |
858 | ||
859 | static int xgbe_phy_config_fixed(struct xgbe_prv_data *pdata) | |
860 | { | |
861 | /* Disable auto-negotiation */ | |
862 | xgbe_disable_an(pdata); | |
863 | ||
864 | /* Validate/Set specified speed */ | |
865 | switch (pdata->phy.speed) { | |
866 | case SPEED_10000: | |
867 | xgbe_set_mode(pdata, XGBE_MODE_KR); | |
868 | break; | |
869 | ||
870 | case SPEED_2500: | |
871 | case SPEED_1000: | |
872 | xgbe_set_mode(pdata, XGBE_MODE_KX); | |
873 | break; | |
874 | ||
875 | default: | |
876 | return -EINVAL; | |
877 | } | |
c5aa9e3b | 878 | |
7c12aa08 LT |
879 | /* Validate duplex mode */ |
880 | if (pdata->phy.duplex != DUPLEX_FULL) | |
881 | return -EINVAL; | |
882 | ||
c5aa9e3b LT |
883 | return 0; |
884 | } | |
885 | ||
7c12aa08 LT |
886 | static int __xgbe_phy_config_aneg(struct xgbe_prv_data *pdata) |
887 | { | |
888 | set_bit(XGBE_LINK_INIT, &pdata->dev_state); | |
889 | pdata->link_check = jiffies; | |
890 | ||
891 | if (pdata->phy.autoneg != AUTONEG_ENABLE) | |
892 | return xgbe_phy_config_fixed(pdata); | |
893 | ||
894 | /* Disable auto-negotiation interrupt */ | |
895 | disable_irq(pdata->an_irq); | |
896 | ||
897 | /* Start auto-negotiation in a supported mode */ | |
898 | if (pdata->phy.advertising & ADVERTISED_10000baseKR_Full) { | |
899 | xgbe_set_mode(pdata, XGBE_MODE_KR); | |
900 | } else if ((pdata->phy.advertising & ADVERTISED_1000baseKX_Full) || | |
901 | (pdata->phy.advertising & ADVERTISED_2500baseX_Full)) { | |
902 | xgbe_set_mode(pdata, XGBE_MODE_KX); | |
903 | } else { | |
904 | enable_irq(pdata->an_irq); | |
905 | return -EINVAL; | |
906 | } | |
907 | ||
908 | /* Disable and stop any in progress auto-negotiation */ | |
909 | xgbe_disable_an(pdata); | |
910 | ||
911 | /* Clear any auto-negotitation interrupts */ | |
912 | XMDIO_WRITE(pdata, MDIO_MMD_AN, MDIO_AN_INT, 0); | |
913 | ||
914 | pdata->an_result = XGBE_AN_READY; | |
915 | pdata->an_state = XGBE_AN_READY; | |
916 | pdata->kr_state = XGBE_RX_BPA; | |
917 | pdata->kx_state = XGBE_RX_BPA; | |
918 | ||
919 | /* Re-enable auto-negotiation interrupt */ | |
920 | enable_irq(pdata->an_irq); | |
921 | ||
922 | /* Set up advertisement registers based on current settings */ | |
923 | xgbe_an_init(pdata); | |
924 | ||
925 | /* Enable and start auto-negotiation */ | |
926 | xgbe_restart_an(pdata); | |
927 | ||
928 | return 0; | |
929 | } | |
930 | ||
931 | static int xgbe_phy_config_aneg(struct xgbe_prv_data *pdata) | |
932 | { | |
933 | int ret; | |
934 | ||
935 | mutex_lock(&pdata->an_mutex); | |
936 | ||
937 | ret = __xgbe_phy_config_aneg(pdata); | |
938 | if (ret) | |
939 | set_bit(XGBE_LINK_ERR, &pdata->dev_state); | |
940 | else | |
941 | clear_bit(XGBE_LINK_ERR, &pdata->dev_state); | |
942 | ||
943 | mutex_unlock(&pdata->an_mutex); | |
944 | ||
945 | return ret; | |
946 | } | |
947 | ||
948 | static bool xgbe_phy_aneg_done(struct xgbe_prv_data *pdata) | |
949 | { | |
950 | return (pdata->an_result == XGBE_AN_COMPLETE); | |
951 | } | |
952 | ||
953 | static void xgbe_check_link_timeout(struct xgbe_prv_data *pdata) | |
954 | { | |
955 | unsigned long link_timeout; | |
956 | ||
957 | link_timeout = pdata->link_check + (XGBE_LINK_TIMEOUT * HZ); | |
958 | if (time_after(jiffies, link_timeout)) | |
959 | xgbe_phy_config_aneg(pdata); | |
960 | } | |
961 | ||
962 | static void xgbe_phy_status_force(struct xgbe_prv_data *pdata) | |
963 | { | |
964 | if (xgbe_in_kr_mode(pdata)) { | |
965 | pdata->phy.speed = SPEED_10000; | |
966 | } else { | |
967 | switch (pdata->speed_set) { | |
968 | case XGBE_SPEEDSET_1000_10000: | |
969 | pdata->phy.speed = SPEED_1000; | |
970 | break; | |
971 | ||
972 | case XGBE_SPEEDSET_2500_10000: | |
973 | pdata->phy.speed = SPEED_2500; | |
974 | break; | |
975 | } | |
976 | } | |
977 | pdata->phy.duplex = DUPLEX_FULL; | |
7c12aa08 LT |
978 | } |
979 | ||
980 | static void xgbe_phy_status_aneg(struct xgbe_prv_data *pdata) | |
981 | { | |
982 | unsigned int ad_reg, lp_reg; | |
983 | ||
984 | pdata->phy.lp_advertising = 0; | |
985 | ||
986 | if ((pdata->phy.autoneg != AUTONEG_ENABLE) || pdata->parallel_detect) | |
987 | return xgbe_phy_status_force(pdata); | |
988 | ||
989 | pdata->phy.lp_advertising |= ADVERTISED_Autoneg; | |
990 | pdata->phy.lp_advertising |= ADVERTISED_Backplane; | |
991 | ||
992 | /* Compare Advertisement and Link Partner register 1 */ | |
993 | ad_reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE); | |
994 | lp_reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_LPA); | |
995 | if (lp_reg & 0x400) | |
996 | pdata->phy.lp_advertising |= ADVERTISED_Pause; | |
997 | if (lp_reg & 0x800) | |
998 | pdata->phy.lp_advertising |= ADVERTISED_Asym_Pause; | |
999 | ||
c1ce2f77 LT |
1000 | if (pdata->phy.pause_autoneg) { |
1001 | /* Set flow control based on auto-negotiation result */ | |
1002 | pdata->phy.tx_pause = 0; | |
1003 | pdata->phy.rx_pause = 0; | |
1004 | ||
1005 | if (ad_reg & lp_reg & 0x400) { | |
1006 | pdata->phy.tx_pause = 1; | |
1007 | pdata->phy.rx_pause = 1; | |
1008 | } else if (ad_reg & lp_reg & 0x800) { | |
1009 | if (ad_reg & 0x400) | |
1010 | pdata->phy.rx_pause = 1; | |
1011 | else if (lp_reg & 0x400) | |
1012 | pdata->phy.tx_pause = 1; | |
1013 | } | |
1014 | } | |
7c12aa08 LT |
1015 | |
1016 | /* Compare Advertisement and Link Partner register 2 */ | |
1017 | ad_reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE + 1); | |
1018 | lp_reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_LPA + 1); | |
1019 | if (lp_reg & 0x80) | |
1020 | pdata->phy.lp_advertising |= ADVERTISED_10000baseKR_Full; | |
1021 | if (lp_reg & 0x20) { | |
1022 | switch (pdata->speed_set) { | |
1023 | case XGBE_SPEEDSET_1000_10000: | |
1024 | pdata->phy.lp_advertising |= ADVERTISED_1000baseKX_Full; | |
1025 | break; | |
1026 | case XGBE_SPEEDSET_2500_10000: | |
1027 | pdata->phy.lp_advertising |= ADVERTISED_2500baseX_Full; | |
1028 | break; | |
1029 | } | |
1030 | } | |
1031 | ||
1032 | ad_reg &= lp_reg; | |
1033 | if (ad_reg & 0x80) { | |
1034 | pdata->phy.speed = SPEED_10000; | |
1035 | xgbe_set_mode(pdata, XGBE_MODE_KR); | |
1036 | } else if (ad_reg & 0x20) { | |
1037 | switch (pdata->speed_set) { | |
1038 | case XGBE_SPEEDSET_1000_10000: | |
1039 | pdata->phy.speed = SPEED_1000; | |
1040 | break; | |
1041 | ||
1042 | case XGBE_SPEEDSET_2500_10000: | |
1043 | pdata->phy.speed = SPEED_2500; | |
1044 | break; | |
1045 | } | |
1046 | ||
1047 | xgbe_set_mode(pdata, XGBE_MODE_KX); | |
1048 | } else { | |
1049 | pdata->phy.speed = SPEED_UNKNOWN; | |
1050 | } | |
1051 | ||
1052 | /* Compare Advertisement and Link Partner register 3 */ | |
1053 | ad_reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE + 2); | |
1054 | lp_reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_LPA + 2); | |
1055 | if (lp_reg & 0xc000) | |
1056 | pdata->phy.lp_advertising |= ADVERTISED_10000baseR_FEC; | |
1057 | ||
1058 | pdata->phy.duplex = DUPLEX_FULL; | |
1059 | } | |
1060 | ||
1061 | static void xgbe_phy_status(struct xgbe_prv_data *pdata) | |
1062 | { | |
1063 | unsigned int reg, link_aneg; | |
1064 | ||
1065 | if (test_bit(XGBE_LINK_ERR, &pdata->dev_state)) { | |
1066 | if (test_and_clear_bit(XGBE_LINK, &pdata->dev_state)) | |
1067 | netif_carrier_off(pdata->netdev); | |
1068 | ||
1069 | pdata->phy.link = 0; | |
1070 | goto adjust_link; | |
1071 | } | |
1072 | ||
1073 | link_aneg = (pdata->phy.autoneg == AUTONEG_ENABLE); | |
1074 | ||
1075 | /* Get the link status. Link status is latched low, so read | |
1076 | * once to clear and then read again to get current state | |
1077 | */ | |
1078 | reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_STAT1); | |
1079 | reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_STAT1); | |
1080 | pdata->phy.link = (reg & MDIO_STAT1_LSTATUS) ? 1 : 0; | |
1081 | ||
1082 | if (pdata->phy.link) { | |
1083 | if (link_aneg && !xgbe_phy_aneg_done(pdata)) { | |
1084 | xgbe_check_link_timeout(pdata); | |
1085 | return; | |
1086 | } | |
1087 | ||
1088 | xgbe_phy_status_aneg(pdata); | |
1089 | ||
1090 | if (test_bit(XGBE_LINK_INIT, &pdata->dev_state)) | |
1091 | clear_bit(XGBE_LINK_INIT, &pdata->dev_state); | |
1092 | ||
1093 | if (!test_bit(XGBE_LINK, &pdata->dev_state)) { | |
1094 | set_bit(XGBE_LINK, &pdata->dev_state); | |
1095 | netif_carrier_on(pdata->netdev); | |
1096 | } | |
1097 | } else { | |
1098 | if (test_bit(XGBE_LINK_INIT, &pdata->dev_state)) { | |
1099 | xgbe_check_link_timeout(pdata); | |
1100 | ||
1101 | if (link_aneg) | |
1102 | return; | |
1103 | } | |
1104 | ||
1105 | xgbe_phy_status_aneg(pdata); | |
1106 | ||
1107 | if (test_bit(XGBE_LINK, &pdata->dev_state)) { | |
1108 | clear_bit(XGBE_LINK, &pdata->dev_state); | |
1109 | netif_carrier_off(pdata->netdev); | |
1110 | } | |
1111 | } | |
1112 | ||
1113 | adjust_link: | |
1114 | xgbe_phy_adjust_link(pdata); | |
1115 | } | |
1116 | ||
1117 | static void xgbe_phy_stop(struct xgbe_prv_data *pdata) | |
1118 | { | |
1119 | /* Disable auto-negotiation */ | |
1120 | xgbe_disable_an(pdata); | |
1121 | ||
1122 | /* Disable auto-negotiation interrupts */ | |
1123 | XMDIO_WRITE(pdata, MDIO_MMD_AN, MDIO_AN_INTMASK, 0); | |
1124 | ||
1125 | devm_free_irq(pdata->dev, pdata->an_irq, pdata); | |
1126 | ||
1127 | pdata->phy.link = 0; | |
1128 | if (test_and_clear_bit(XGBE_LINK, &pdata->dev_state)) | |
1129 | netif_carrier_off(pdata->netdev); | |
1130 | ||
1131 | xgbe_phy_adjust_link(pdata); | |
1132 | } | |
1133 | ||
1134 | static int xgbe_phy_start(struct xgbe_prv_data *pdata) | |
1135 | { | |
1136 | struct net_device *netdev = pdata->netdev; | |
1137 | int ret; | |
1138 | ||
1139 | ret = devm_request_irq(pdata->dev, pdata->an_irq, | |
1140 | xgbe_an_isr, 0, pdata->an_name, | |
1141 | pdata); | |
1142 | if (ret) { | |
1143 | netdev_err(netdev, "phy irq request failed\n"); | |
1144 | return ret; | |
1145 | } | |
1146 | ||
1147 | /* Set initial mode - call the mode setting routines | |
1148 | * directly to insure we are properly configured | |
1149 | */ | |
471e14b2 | 1150 | if (xgbe_use_xgmii_mode(pdata)) { |
7c12aa08 | 1151 | xgbe_xgmii_mode(pdata); |
471e14b2 | 1152 | } else if (xgbe_use_gmii_mode(pdata)) { |
7c12aa08 | 1153 | xgbe_gmii_mode(pdata); |
471e14b2 | 1154 | } else if (xgbe_use_gmii_2500_mode(pdata)) { |
7c12aa08 LT |
1155 | xgbe_gmii_2500_mode(pdata); |
1156 | } else { | |
1157 | ret = -EINVAL; | |
1158 | goto err_irq; | |
1159 | } | |
1160 | ||
1161 | /* Set up advertisement registers based on current settings */ | |
1162 | xgbe_an_init(pdata); | |
1163 | ||
1164 | /* Enable auto-negotiation interrupts */ | |
1165 | XMDIO_WRITE(pdata, MDIO_MMD_AN, MDIO_AN_INTMASK, 0x07); | |
1166 | ||
1167 | return xgbe_phy_config_aneg(pdata); | |
1168 | ||
1169 | err_irq: | |
1170 | devm_free_irq(pdata->dev, pdata->an_irq, pdata); | |
1171 | ||
1172 | return ret; | |
1173 | } | |
1174 | ||
1175 | static int xgbe_phy_reset(struct xgbe_prv_data *pdata) | |
1176 | { | |
1177 | unsigned int count, reg; | |
1178 | ||
1179 | reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_CTRL1); | |
1180 | reg |= MDIO_CTRL1_RESET; | |
1181 | XMDIO_WRITE(pdata, MDIO_MMD_PCS, MDIO_CTRL1, reg); | |
1182 | ||
1183 | count = 50; | |
1184 | do { | |
1185 | msleep(20); | |
1186 | reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_CTRL1); | |
1187 | } while ((reg & MDIO_CTRL1_RESET) && --count); | |
1188 | ||
1189 | if (reg & MDIO_CTRL1_RESET) | |
1190 | return -ETIMEDOUT; | |
1191 | ||
1192 | /* Disable auto-negotiation for now */ | |
1193 | xgbe_disable_an(pdata); | |
1194 | ||
1195 | /* Clear auto-negotiation interrupts */ | |
1196 | XMDIO_WRITE(pdata, MDIO_MMD_AN, MDIO_AN_INT, 0); | |
1197 | ||
1198 | return 0; | |
1199 | } | |
1200 | ||
1201 | static void xgbe_dump_phy_registers(struct xgbe_prv_data *pdata) | |
c5aa9e3b LT |
1202 | { |
1203 | struct device *dev = pdata->dev; | |
c5aa9e3b | 1204 | |
34bf65df LT |
1205 | dev_dbg(dev, "\n************* PHY Reg dump **********************\n"); |
1206 | ||
1207 | dev_dbg(dev, "PCS Control Reg (%#04x) = %#04x\n", MDIO_CTRL1, | |
1208 | XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_CTRL1)); | |
1209 | dev_dbg(dev, "PCS Status Reg (%#04x) = %#04x\n", MDIO_STAT1, | |
1210 | XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_STAT1)); | |
1211 | dev_dbg(dev, "Phy Id (PHYS ID 1 %#04x)= %#04x\n", MDIO_DEVID1, | |
1212 | XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_DEVID1)); | |
1213 | dev_dbg(dev, "Phy Id (PHYS ID 2 %#04x)= %#04x\n", MDIO_DEVID2, | |
1214 | XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_DEVID2)); | |
1215 | dev_dbg(dev, "Devices in Package (%#04x)= %#04x\n", MDIO_DEVS1, | |
1216 | XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_DEVS1)); | |
1217 | dev_dbg(dev, "Devices in Package (%#04x)= %#04x\n", MDIO_DEVS2, | |
1218 | XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_DEVS2)); | |
1219 | ||
1220 | dev_dbg(dev, "Auto-Neg Control Reg (%#04x) = %#04x\n", MDIO_CTRL1, | |
1221 | XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_CTRL1)); | |
1222 | dev_dbg(dev, "Auto-Neg Status Reg (%#04x) = %#04x\n", MDIO_STAT1, | |
1223 | XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_STAT1)); | |
1224 | dev_dbg(dev, "Auto-Neg Ad Reg 1 (%#04x) = %#04x\n", | |
1225 | MDIO_AN_ADVERTISE, | |
1226 | XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE)); | |
1227 | dev_dbg(dev, "Auto-Neg Ad Reg 2 (%#04x) = %#04x\n", | |
1228 | MDIO_AN_ADVERTISE + 1, | |
1229 | XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE + 1)); | |
1230 | dev_dbg(dev, "Auto-Neg Ad Reg 3 (%#04x) = %#04x\n", | |
1231 | MDIO_AN_ADVERTISE + 2, | |
1232 | XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE + 2)); | |
1233 | dev_dbg(dev, "Auto-Neg Completion Reg (%#04x) = %#04x\n", | |
1234 | MDIO_AN_COMP_STAT, | |
1235 | XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_COMP_STAT)); | |
1236 | ||
34bf65df | 1237 | dev_dbg(dev, "\n*************************************************\n"); |
c5aa9e3b LT |
1238 | } |
1239 | ||
7c12aa08 | 1240 | static void xgbe_phy_init(struct xgbe_prv_data *pdata) |
c5aa9e3b | 1241 | { |
7c12aa08 LT |
1242 | mutex_init(&pdata->an_mutex); |
1243 | INIT_WORK(&pdata->an_irq_work, xgbe_an_irq_work); | |
1244 | INIT_WORK(&pdata->an_work, xgbe_an_state_machine); | |
1245 | pdata->mdio_mmd = MDIO_MMD_PCS; | |
c5aa9e3b | 1246 | |
7c12aa08 LT |
1247 | /* Initialize supported features */ |
1248 | pdata->phy.supported = SUPPORTED_Autoneg; | |
1249 | pdata->phy.supported |= SUPPORTED_Pause | SUPPORTED_Asym_Pause; | |
1250 | pdata->phy.supported |= SUPPORTED_Backplane; | |
1251 | pdata->phy.supported |= SUPPORTED_10000baseKR_Full; | |
1252 | switch (pdata->speed_set) { | |
1253 | case XGBE_SPEEDSET_1000_10000: | |
1254 | pdata->phy.supported |= SUPPORTED_1000baseKX_Full; | |
1255 | break; | |
1256 | case XGBE_SPEEDSET_2500_10000: | |
1257 | pdata->phy.supported |= SUPPORTED_2500baseX_Full; | |
1258 | break; | |
94c043e5 | 1259 | } |
c5aa9e3b | 1260 | |
7c12aa08 LT |
1261 | pdata->fec_ability = XMDIO_READ(pdata, MDIO_MMD_PMAPMD, |
1262 | MDIO_PMA_10GBR_FECABLE); | |
1263 | pdata->fec_ability &= (MDIO_PMA_10GBR_FECABLE_ABLE | | |
1264 | MDIO_PMA_10GBR_FECABLE_ERRABLE); | |
1265 | if (pdata->fec_ability & MDIO_PMA_10GBR_FECABLE_ABLE) | |
1266 | pdata->phy.supported |= SUPPORTED_10000baseR_FEC; | |
c5aa9e3b | 1267 | |
7c12aa08 | 1268 | pdata->phy.advertising = pdata->phy.supported; |
c5aa9e3b | 1269 | |
7c12aa08 | 1270 | pdata->phy.address = 0; |
c5aa9e3b | 1271 | |
7c12aa08 LT |
1272 | pdata->phy.autoneg = AUTONEG_ENABLE; |
1273 | pdata->phy.speed = SPEED_UNKNOWN; | |
1274 | pdata->phy.duplex = DUPLEX_UNKNOWN; | |
c5aa9e3b | 1275 | |
7c12aa08 | 1276 | pdata->phy.link = 0; |
c5aa9e3b | 1277 | |
c1ce2f77 LT |
1278 | pdata->phy.pause_autoneg = pdata->pause_autoneg; |
1279 | pdata->phy.tx_pause = pdata->tx_pause; | |
1280 | pdata->phy.rx_pause = pdata->rx_pause; | |
1281 | ||
1282 | /* Fix up Flow Control advertising */ | |
1283 | pdata->phy.advertising &= ~ADVERTISED_Pause; | |
1284 | pdata->phy.advertising &= ~ADVERTISED_Asym_Pause; | |
1285 | ||
1286 | if (pdata->rx_pause) { | |
1287 | pdata->phy.advertising |= ADVERTISED_Pause; | |
1288 | pdata->phy.advertising |= ADVERTISED_Asym_Pause; | |
1289 | } | |
1290 | ||
1291 | if (pdata->tx_pause) | |
1292 | pdata->phy.advertising ^= ADVERTISED_Asym_Pause; | |
1293 | ||
34bf65df LT |
1294 | if (netif_msg_drv(pdata)) |
1295 | xgbe_dump_phy_registers(pdata); | |
c5aa9e3b LT |
1296 | } |
1297 | ||
7c12aa08 | 1298 | void xgbe_init_function_ptrs_phy(struct xgbe_phy_if *phy_if) |
c5aa9e3b | 1299 | { |
7c12aa08 | 1300 | phy_if->phy_init = xgbe_phy_init; |
c5aa9e3b | 1301 | |
7c12aa08 LT |
1302 | phy_if->phy_reset = xgbe_phy_reset; |
1303 | phy_if->phy_start = xgbe_phy_start; | |
1304 | phy_if->phy_stop = xgbe_phy_stop; | |
c5aa9e3b | 1305 | |
7c12aa08 LT |
1306 | phy_if->phy_status = xgbe_phy_status; |
1307 | phy_if->phy_config_aneg = xgbe_phy_config_aneg; | |
c5aa9e3b | 1308 | } |