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) 2016 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) 2016 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>
119 #include <linux/device.h>
120 #include <linux/property.h>
121 #include <linux/mdio.h>
122 #include <linux/phy.h>
123
124 #include "xgbe.h"
125 #include "xgbe-common.h"
126
127 #define XGBE_BLWC_PROPERTY "amd,serdes-blwc"
128 #define XGBE_CDR_RATE_PROPERTY "amd,serdes-cdr-rate"
129 #define XGBE_PQ_SKEW_PROPERTY "amd,serdes-pq-skew"
130 #define XGBE_TX_AMP_PROPERTY "amd,serdes-tx-amp"
131 #define XGBE_DFE_CFG_PROPERTY "amd,serdes-dfe-tap-config"
132 #define XGBE_DFE_ENA_PROPERTY "amd,serdes-dfe-tap-enable"
133
134 /* Default SerDes settings */
135 #define XGBE_SPEED_1000_BLWC 1
136 #define XGBE_SPEED_1000_CDR 0x2
137 #define XGBE_SPEED_1000_PLL 0x0
138 #define XGBE_SPEED_1000_PQ 0xa
139 #define XGBE_SPEED_1000_RATE 0x3
140 #define XGBE_SPEED_1000_TXAMP 0xf
141 #define XGBE_SPEED_1000_WORD 0x1
142 #define XGBE_SPEED_1000_DFE_TAP_CONFIG 0x3
143 #define XGBE_SPEED_1000_DFE_TAP_ENABLE 0x0
144
145 #define XGBE_SPEED_2500_BLWC 1
146 #define XGBE_SPEED_2500_CDR 0x2
147 #define XGBE_SPEED_2500_PLL 0x0
148 #define XGBE_SPEED_2500_PQ 0xa
149 #define XGBE_SPEED_2500_RATE 0x1
150 #define XGBE_SPEED_2500_TXAMP 0xf
151 #define XGBE_SPEED_2500_WORD 0x1
152 #define XGBE_SPEED_2500_DFE_TAP_CONFIG 0x3
153 #define XGBE_SPEED_2500_DFE_TAP_ENABLE 0x0
154
155 #define XGBE_SPEED_10000_BLWC 0
156 #define XGBE_SPEED_10000_CDR 0x7
157 #define XGBE_SPEED_10000_PLL 0x1
158 #define XGBE_SPEED_10000_PQ 0x12
159 #define XGBE_SPEED_10000_RATE 0x0
160 #define XGBE_SPEED_10000_TXAMP 0xa
161 #define XGBE_SPEED_10000_WORD 0x7
162 #define XGBE_SPEED_10000_DFE_TAP_CONFIG 0x1
163 #define XGBE_SPEED_10000_DFE_TAP_ENABLE 0x7f
164
165 /* Rate-change complete wait/retry count */
166 #define XGBE_RATECHANGE_COUNT 500
167
168 static const u32 xgbe_phy_blwc[] = {
169 XGBE_SPEED_1000_BLWC,
170 XGBE_SPEED_2500_BLWC,
171 XGBE_SPEED_10000_BLWC,
172 };
173
174 static const u32 xgbe_phy_cdr_rate[] = {
175 XGBE_SPEED_1000_CDR,
176 XGBE_SPEED_2500_CDR,
177 XGBE_SPEED_10000_CDR,
178 };
179
180 static const u32 xgbe_phy_pq_skew[] = {
181 XGBE_SPEED_1000_PQ,
182 XGBE_SPEED_2500_PQ,
183 XGBE_SPEED_10000_PQ,
184 };
185
186 static const u32 xgbe_phy_tx_amp[] = {
187 XGBE_SPEED_1000_TXAMP,
188 XGBE_SPEED_2500_TXAMP,
189 XGBE_SPEED_10000_TXAMP,
190 };
191
192 static const u32 xgbe_phy_dfe_tap_cfg[] = {
193 XGBE_SPEED_1000_DFE_TAP_CONFIG,
194 XGBE_SPEED_2500_DFE_TAP_CONFIG,
195 XGBE_SPEED_10000_DFE_TAP_CONFIG,
196 };
197
198 static const u32 xgbe_phy_dfe_tap_ena[] = {
199 XGBE_SPEED_1000_DFE_TAP_ENABLE,
200 XGBE_SPEED_2500_DFE_TAP_ENABLE,
201 XGBE_SPEED_10000_DFE_TAP_ENABLE,
202 };
203
204 struct xgbe_phy_data {
205 /* 1000/10000 vs 2500/10000 indicator */
206 unsigned int speed_set;
207
208 /* SerDes UEFI configurable settings.
209 * Switching between modes/speeds requires new values for some
210 * SerDes settings. The values can be supplied as device
211 * properties in array format. The first array entry is for
212 * 1GbE, second for 2.5GbE and third for 10GbE
213 */
214 u32 blwc[XGBE_SPEEDS];
215 u32 cdr_rate[XGBE_SPEEDS];
216 u32 pq_skew[XGBE_SPEEDS];
217 u32 tx_amp[XGBE_SPEEDS];
218 u32 dfe_tap_cfg[XGBE_SPEEDS];
219 u32 dfe_tap_ena[XGBE_SPEEDS];
220 };
221
xgbe_phy_kr_training_pre(struct xgbe_prv_data * pdata)222 static void xgbe_phy_kr_training_pre(struct xgbe_prv_data *pdata)
223 {
224 XSIR0_IOWRITE_BITS(pdata, SIR0_KR_RT_1, RESET, 1);
225 }
226
xgbe_phy_kr_training_post(struct xgbe_prv_data * pdata)227 static void xgbe_phy_kr_training_post(struct xgbe_prv_data *pdata)
228 {
229 XSIR0_IOWRITE_BITS(pdata, SIR0_KR_RT_1, RESET, 0);
230 }
231
xgbe_phy_an_outcome(struct xgbe_prv_data * pdata)232 static enum xgbe_mode xgbe_phy_an_outcome(struct xgbe_prv_data *pdata)
233 {
234 struct ethtool_link_ksettings *lks = &pdata->phy.lks;
235 struct xgbe_phy_data *phy_data = pdata->phy_data;
236 enum xgbe_mode mode;
237 unsigned int ad_reg, lp_reg;
238
239 XGBE_SET_LP_ADV(lks, Autoneg);
240 XGBE_SET_LP_ADV(lks, Backplane);
241
242 /* Compare Advertisement and Link Partner register 1 */
243 ad_reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE);
244 lp_reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_LPA);
245 if (lp_reg & 0x400)
246 XGBE_SET_LP_ADV(lks, Pause);
247 if (lp_reg & 0x800)
248 XGBE_SET_LP_ADV(lks, Asym_Pause);
249
250 if (pdata->phy.pause_autoneg) {
251 /* Set flow control based on auto-negotiation result */
252 pdata->phy.tx_pause = 0;
253 pdata->phy.rx_pause = 0;
254
255 if (ad_reg & lp_reg & 0x400) {
256 pdata->phy.tx_pause = 1;
257 pdata->phy.rx_pause = 1;
258 } else if (ad_reg & lp_reg & 0x800) {
259 if (ad_reg & 0x400)
260 pdata->phy.rx_pause = 1;
261 else if (lp_reg & 0x400)
262 pdata->phy.tx_pause = 1;
263 }
264 }
265
266 /* Compare Advertisement and Link Partner register 2 */
267 ad_reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE + 1);
268 lp_reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_LPA + 1);
269 if (lp_reg & 0x80)
270 XGBE_SET_LP_ADV(lks, 10000baseKR_Full);
271 if (lp_reg & 0x20) {
272 if (phy_data->speed_set == XGBE_SPEEDSET_2500_10000)
273 XGBE_SET_LP_ADV(lks, 2500baseX_Full);
274 else
275 XGBE_SET_LP_ADV(lks, 1000baseKX_Full);
276 }
277
278 ad_reg &= lp_reg;
279 if (ad_reg & 0x80) {
280 mode = XGBE_MODE_KR;
281 } else if (ad_reg & 0x20) {
282 if (phy_data->speed_set == XGBE_SPEEDSET_2500_10000)
283 mode = XGBE_MODE_KX_2500;
284 else
285 mode = XGBE_MODE_KX_1000;
286 } else {
287 mode = XGBE_MODE_UNKNOWN;
288 }
289
290 /* Compare Advertisement and Link Partner register 3 */
291 ad_reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_ADVERTISE + 2);
292 lp_reg = XMDIO_READ(pdata, MDIO_MMD_AN, MDIO_AN_LPA + 2);
293 if (lp_reg & 0xc000)
294 XGBE_SET_LP_ADV(lks, 10000baseR_FEC);
295
296 return mode;
297 }
298
xgbe_phy_an_advertising(struct xgbe_prv_data * pdata,struct ethtool_link_ksettings * dlks)299 static void xgbe_phy_an_advertising(struct xgbe_prv_data *pdata,
300 struct ethtool_link_ksettings *dlks)
301 {
302 struct ethtool_link_ksettings *slks = &pdata->phy.lks;
303
304 XGBE_LM_COPY(dlks, advertising, slks, advertising);
305 }
306
xgbe_phy_an_config(struct xgbe_prv_data * pdata)307 static int xgbe_phy_an_config(struct xgbe_prv_data *pdata)
308 {
309 /* Nothing uniquely required for an configuration */
310 return 0;
311 }
312
xgbe_phy_an_mode(struct xgbe_prv_data * pdata)313 static enum xgbe_an_mode xgbe_phy_an_mode(struct xgbe_prv_data *pdata)
314 {
315 return XGBE_AN_MODE_CL73;
316 }
317
xgbe_phy_pcs_power_cycle(struct xgbe_prv_data * pdata)318 static void xgbe_phy_pcs_power_cycle(struct xgbe_prv_data *pdata)
319 {
320 unsigned int reg;
321
322 reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_CTRL1);
323
324 reg |= MDIO_CTRL1_LPOWER;
325 XMDIO_WRITE(pdata, MDIO_MMD_PCS, MDIO_CTRL1, reg);
326
327 usleep_range(75, 100);
328
329 reg &= ~MDIO_CTRL1_LPOWER;
330 XMDIO_WRITE(pdata, MDIO_MMD_PCS, MDIO_CTRL1, reg);
331 }
332
xgbe_phy_start_ratechange(struct xgbe_prv_data * pdata)333 static void xgbe_phy_start_ratechange(struct xgbe_prv_data *pdata)
334 {
335 /* Assert Rx and Tx ratechange */
336 XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, RATECHANGE, 1);
337 }
338
xgbe_phy_complete_ratechange(struct xgbe_prv_data * pdata)339 static void xgbe_phy_complete_ratechange(struct xgbe_prv_data *pdata)
340 {
341 unsigned int wait;
342 u16 status;
343
344 /* Release Rx and Tx ratechange */
345 XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, RATECHANGE, 0);
346
347 /* Wait for Rx and Tx ready */
348 wait = XGBE_RATECHANGE_COUNT;
349 while (wait--) {
350 usleep_range(50, 75);
351
352 status = XSIR0_IOREAD(pdata, SIR0_STATUS);
353 if (XSIR_GET_BITS(status, SIR0_STATUS, RX_READY) &&
354 XSIR_GET_BITS(status, SIR0_STATUS, TX_READY))
355 goto rx_reset;
356 }
357
358 netif_dbg(pdata, link, pdata->netdev, "SerDes rx/tx not ready (%#hx)\n",
359 status);
360
361 rx_reset:
362 /* Perform Rx reset for the DFE changes */
363 XRXTX_IOWRITE_BITS(pdata, RXTX_REG6, RESETB_RXD, 0);
364 XRXTX_IOWRITE_BITS(pdata, RXTX_REG6, RESETB_RXD, 1);
365 }
366
xgbe_phy_kr_mode(struct xgbe_prv_data * pdata)367 static void xgbe_phy_kr_mode(struct xgbe_prv_data *pdata)
368 {
369 struct xgbe_phy_data *phy_data = pdata->phy_data;
370 unsigned int reg;
371
372 /* Set PCS to KR/10G speed */
373 reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_CTRL2);
374 reg &= ~MDIO_PCS_CTRL2_TYPE;
375 reg |= MDIO_PCS_CTRL2_10GBR;
376 XMDIO_WRITE(pdata, MDIO_MMD_PCS, MDIO_CTRL2, reg);
377
378 reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_CTRL1);
379 reg &= ~MDIO_CTRL1_SPEEDSEL;
380 reg |= MDIO_CTRL1_SPEED10G;
381 XMDIO_WRITE(pdata, MDIO_MMD_PCS, MDIO_CTRL1, reg);
382
383 xgbe_phy_pcs_power_cycle(pdata);
384
385 /* Set SerDes to 10G speed */
386 xgbe_phy_start_ratechange(pdata);
387
388 XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, DATARATE, XGBE_SPEED_10000_RATE);
389 XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, WORDMODE, XGBE_SPEED_10000_WORD);
390 XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, PLLSEL, XGBE_SPEED_10000_PLL);
391
392 XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, CDR_RATE,
393 phy_data->cdr_rate[XGBE_SPEED_10000]);
394 XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, TXAMP,
395 phy_data->tx_amp[XGBE_SPEED_10000]);
396 XRXTX_IOWRITE_BITS(pdata, RXTX_REG20, BLWC_ENA,
397 phy_data->blwc[XGBE_SPEED_10000]);
398 XRXTX_IOWRITE_BITS(pdata, RXTX_REG114, PQ_REG,
399 phy_data->pq_skew[XGBE_SPEED_10000]);
400 XRXTX_IOWRITE_BITS(pdata, RXTX_REG129, RXDFE_CONFIG,
401 phy_data->dfe_tap_cfg[XGBE_SPEED_10000]);
402 XRXTX_IOWRITE(pdata, RXTX_REG22,
403 phy_data->dfe_tap_ena[XGBE_SPEED_10000]);
404
405 xgbe_phy_complete_ratechange(pdata);
406
407 netif_dbg(pdata, link, pdata->netdev, "10GbE KR mode set\n");
408 }
409
xgbe_phy_kx_2500_mode(struct xgbe_prv_data * pdata)410 static void xgbe_phy_kx_2500_mode(struct xgbe_prv_data *pdata)
411 {
412 struct xgbe_phy_data *phy_data = pdata->phy_data;
413 unsigned int reg;
414
415 /* Set PCS to KX/1G speed */
416 reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_CTRL2);
417 reg &= ~MDIO_PCS_CTRL2_TYPE;
418 reg |= MDIO_PCS_CTRL2_10GBX;
419 XMDIO_WRITE(pdata, MDIO_MMD_PCS, MDIO_CTRL2, reg);
420
421 reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_CTRL1);
422 reg &= ~MDIO_CTRL1_SPEEDSEL;
423 reg |= MDIO_CTRL1_SPEED1G;
424 XMDIO_WRITE(pdata, MDIO_MMD_PCS, MDIO_CTRL1, reg);
425
426 xgbe_phy_pcs_power_cycle(pdata);
427
428 /* Set SerDes to 2.5G speed */
429 xgbe_phy_start_ratechange(pdata);
430
431 XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, DATARATE, XGBE_SPEED_2500_RATE);
432 XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, WORDMODE, XGBE_SPEED_2500_WORD);
433 XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, PLLSEL, XGBE_SPEED_2500_PLL);
434
435 XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, CDR_RATE,
436 phy_data->cdr_rate[XGBE_SPEED_2500]);
437 XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, TXAMP,
438 phy_data->tx_amp[XGBE_SPEED_2500]);
439 XRXTX_IOWRITE_BITS(pdata, RXTX_REG20, BLWC_ENA,
440 phy_data->blwc[XGBE_SPEED_2500]);
441 XRXTX_IOWRITE_BITS(pdata, RXTX_REG114, PQ_REG,
442 phy_data->pq_skew[XGBE_SPEED_2500]);
443 XRXTX_IOWRITE_BITS(pdata, RXTX_REG129, RXDFE_CONFIG,
444 phy_data->dfe_tap_cfg[XGBE_SPEED_2500]);
445 XRXTX_IOWRITE(pdata, RXTX_REG22,
446 phy_data->dfe_tap_ena[XGBE_SPEED_2500]);
447
448 xgbe_phy_complete_ratechange(pdata);
449
450 netif_dbg(pdata, link, pdata->netdev, "2.5GbE KX mode set\n");
451 }
452
xgbe_phy_kx_1000_mode(struct xgbe_prv_data * pdata)453 static void xgbe_phy_kx_1000_mode(struct xgbe_prv_data *pdata)
454 {
455 struct xgbe_phy_data *phy_data = pdata->phy_data;
456 unsigned int reg;
457
458 /* Set PCS to KX/1G speed */
459 reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_CTRL2);
460 reg &= ~MDIO_PCS_CTRL2_TYPE;
461 reg |= MDIO_PCS_CTRL2_10GBX;
462 XMDIO_WRITE(pdata, MDIO_MMD_PCS, MDIO_CTRL2, reg);
463
464 reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_CTRL1);
465 reg &= ~MDIO_CTRL1_SPEEDSEL;
466 reg |= MDIO_CTRL1_SPEED1G;
467 XMDIO_WRITE(pdata, MDIO_MMD_PCS, MDIO_CTRL1, reg);
468
469 xgbe_phy_pcs_power_cycle(pdata);
470
471 /* Set SerDes to 1G speed */
472 xgbe_phy_start_ratechange(pdata);
473
474 XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, DATARATE, XGBE_SPEED_1000_RATE);
475 XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, WORDMODE, XGBE_SPEED_1000_WORD);
476 XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, PLLSEL, XGBE_SPEED_1000_PLL);
477
478 XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, CDR_RATE,
479 phy_data->cdr_rate[XGBE_SPEED_1000]);
480 XSIR1_IOWRITE_BITS(pdata, SIR1_SPEED, TXAMP,
481 phy_data->tx_amp[XGBE_SPEED_1000]);
482 XRXTX_IOWRITE_BITS(pdata, RXTX_REG20, BLWC_ENA,
483 phy_data->blwc[XGBE_SPEED_1000]);
484 XRXTX_IOWRITE_BITS(pdata, RXTX_REG114, PQ_REG,
485 phy_data->pq_skew[XGBE_SPEED_1000]);
486 XRXTX_IOWRITE_BITS(pdata, RXTX_REG129, RXDFE_CONFIG,
487 phy_data->dfe_tap_cfg[XGBE_SPEED_1000]);
488 XRXTX_IOWRITE(pdata, RXTX_REG22,
489 phy_data->dfe_tap_ena[XGBE_SPEED_1000]);
490
491 xgbe_phy_complete_ratechange(pdata);
492
493 netif_dbg(pdata, link, pdata->netdev, "1GbE KX mode set\n");
494 }
495
xgbe_phy_cur_mode(struct xgbe_prv_data * pdata)496 static enum xgbe_mode xgbe_phy_cur_mode(struct xgbe_prv_data *pdata)
497 {
498 struct xgbe_phy_data *phy_data = pdata->phy_data;
499 enum xgbe_mode mode;
500 unsigned int reg;
501
502 reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_CTRL2);
503 reg &= MDIO_PCS_CTRL2_TYPE;
504
505 if (reg == MDIO_PCS_CTRL2_10GBR) {
506 mode = XGBE_MODE_KR;
507 } else {
508 if (phy_data->speed_set == XGBE_SPEEDSET_2500_10000)
509 mode = XGBE_MODE_KX_2500;
510 else
511 mode = XGBE_MODE_KX_1000;
512 }
513
514 return mode;
515 }
516
xgbe_phy_switch_mode(struct xgbe_prv_data * pdata)517 static enum xgbe_mode xgbe_phy_switch_mode(struct xgbe_prv_data *pdata)
518 {
519 struct xgbe_phy_data *phy_data = pdata->phy_data;
520 enum xgbe_mode mode;
521
522 /* If we are in KR switch to KX, and vice-versa */
523 if (xgbe_phy_cur_mode(pdata) == XGBE_MODE_KR) {
524 if (phy_data->speed_set == XGBE_SPEEDSET_2500_10000)
525 mode = XGBE_MODE_KX_2500;
526 else
527 mode = XGBE_MODE_KX_1000;
528 } else {
529 mode = XGBE_MODE_KR;
530 }
531
532 return mode;
533 }
534
xgbe_phy_get_mode(struct xgbe_prv_data * pdata,int speed)535 static enum xgbe_mode xgbe_phy_get_mode(struct xgbe_prv_data *pdata,
536 int speed)
537 {
538 struct xgbe_phy_data *phy_data = pdata->phy_data;
539
540 switch (speed) {
541 case SPEED_1000:
542 return (phy_data->speed_set == XGBE_SPEEDSET_1000_10000)
543 ? XGBE_MODE_KX_1000 : XGBE_MODE_UNKNOWN;
544 case SPEED_2500:
545 return (phy_data->speed_set == XGBE_SPEEDSET_2500_10000)
546 ? XGBE_MODE_KX_2500 : XGBE_MODE_UNKNOWN;
547 case SPEED_10000:
548 return XGBE_MODE_KR;
549 default:
550 return XGBE_MODE_UNKNOWN;
551 }
552 }
553
xgbe_phy_set_mode(struct xgbe_prv_data * pdata,enum xgbe_mode mode)554 static void xgbe_phy_set_mode(struct xgbe_prv_data *pdata, enum xgbe_mode mode)
555 {
556 switch (mode) {
557 case XGBE_MODE_KX_1000:
558 xgbe_phy_kx_1000_mode(pdata);
559 break;
560 case XGBE_MODE_KX_2500:
561 xgbe_phy_kx_2500_mode(pdata);
562 break;
563 case XGBE_MODE_KR:
564 xgbe_phy_kr_mode(pdata);
565 break;
566 default:
567 break;
568 }
569 }
570
xgbe_phy_check_mode(struct xgbe_prv_data * pdata,enum xgbe_mode mode,bool advert)571 static bool xgbe_phy_check_mode(struct xgbe_prv_data *pdata,
572 enum xgbe_mode mode, bool advert)
573 {
574 if (pdata->phy.autoneg == AUTONEG_ENABLE) {
575 return advert;
576 } else {
577 enum xgbe_mode cur_mode;
578
579 cur_mode = xgbe_phy_get_mode(pdata, pdata->phy.speed);
580 if (cur_mode == mode)
581 return true;
582 }
583
584 return false;
585 }
586
xgbe_phy_use_mode(struct xgbe_prv_data * pdata,enum xgbe_mode mode)587 static bool xgbe_phy_use_mode(struct xgbe_prv_data *pdata, enum xgbe_mode mode)
588 {
589 struct ethtool_link_ksettings *lks = &pdata->phy.lks;
590
591 switch (mode) {
592 case XGBE_MODE_KX_1000:
593 return xgbe_phy_check_mode(pdata, mode,
594 XGBE_ADV(lks, 1000baseKX_Full));
595 case XGBE_MODE_KX_2500:
596 return xgbe_phy_check_mode(pdata, mode,
597 XGBE_ADV(lks, 2500baseX_Full));
598 case XGBE_MODE_KR:
599 return xgbe_phy_check_mode(pdata, mode,
600 XGBE_ADV(lks, 10000baseKR_Full));
601 default:
602 return false;
603 }
604 }
605
xgbe_phy_valid_speed(struct xgbe_prv_data * pdata,int speed)606 static bool xgbe_phy_valid_speed(struct xgbe_prv_data *pdata, int speed)
607 {
608 struct xgbe_phy_data *phy_data = pdata->phy_data;
609
610 switch (speed) {
611 case SPEED_1000:
612 if (phy_data->speed_set != XGBE_SPEEDSET_1000_10000)
613 return false;
614 return true;
615 case SPEED_2500:
616 if (phy_data->speed_set != XGBE_SPEEDSET_2500_10000)
617 return false;
618 return true;
619 case SPEED_10000:
620 return true;
621 default:
622 return false;
623 }
624 }
625
xgbe_phy_link_status(struct xgbe_prv_data * pdata,int * an_restart)626 static int xgbe_phy_link_status(struct xgbe_prv_data *pdata, int *an_restart)
627 {
628 unsigned int reg;
629
630 *an_restart = 0;
631
632 /* Link status is latched low, so read once to clear
633 * and then read again to get current state
634 */
635 reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_STAT1);
636 reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_STAT1);
637
638 return (reg & MDIO_STAT1_LSTATUS) ? 1 : 0;
639 }
640
xgbe_phy_stop(struct xgbe_prv_data * pdata)641 static void xgbe_phy_stop(struct xgbe_prv_data *pdata)
642 {
643 /* Nothing uniquely required for stop */
644 }
645
xgbe_phy_start(struct xgbe_prv_data * pdata)646 static int xgbe_phy_start(struct xgbe_prv_data *pdata)
647 {
648 /* Nothing uniquely required for start */
649 return 0;
650 }
651
xgbe_phy_reset(struct xgbe_prv_data * pdata)652 static int xgbe_phy_reset(struct xgbe_prv_data *pdata)
653 {
654 unsigned int reg, count;
655
656 /* Perform a software reset of the PCS */
657 reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_CTRL1);
658 reg |= MDIO_CTRL1_RESET;
659 XMDIO_WRITE(pdata, MDIO_MMD_PCS, MDIO_CTRL1, reg);
660
661 count = 50;
662 do {
663 msleep(20);
664 reg = XMDIO_READ(pdata, MDIO_MMD_PCS, MDIO_CTRL1);
665 } while ((reg & MDIO_CTRL1_RESET) && --count);
666
667 if (reg & MDIO_CTRL1_RESET)
668 return -ETIMEDOUT;
669
670 return 0;
671 }
672
xgbe_phy_exit(struct xgbe_prv_data * pdata)673 static void xgbe_phy_exit(struct xgbe_prv_data *pdata)
674 {
675 /* Nothing uniquely required for exit */
676 }
677
xgbe_phy_init(struct xgbe_prv_data * pdata)678 static int xgbe_phy_init(struct xgbe_prv_data *pdata)
679 {
680 struct ethtool_link_ksettings *lks = &pdata->phy.lks;
681 struct xgbe_phy_data *phy_data;
682 int ret;
683
684 phy_data = devm_kzalloc(pdata->dev, sizeof(*phy_data), GFP_KERNEL);
685 if (!phy_data)
686 return -ENOMEM;
687
688 /* Retrieve the PHY speedset */
689 ret = device_property_read_u32(pdata->phy_dev, XGBE_SPEEDSET_PROPERTY,
690 &phy_data->speed_set);
691 if (ret) {
692 dev_err(pdata->dev, "invalid %s property\n",
693 XGBE_SPEEDSET_PROPERTY);
694 return ret;
695 }
696
697 switch (phy_data->speed_set) {
698 case XGBE_SPEEDSET_1000_10000:
699 case XGBE_SPEEDSET_2500_10000:
700 break;
701 default:
702 dev_err(pdata->dev, "invalid %s property\n",
703 XGBE_SPEEDSET_PROPERTY);
704 return -EINVAL;
705 }
706
707 /* Retrieve the PHY configuration properties */
708 if (device_property_present(pdata->phy_dev, XGBE_BLWC_PROPERTY)) {
709 ret = device_property_read_u32_array(pdata->phy_dev,
710 XGBE_BLWC_PROPERTY,
711 phy_data->blwc,
712 XGBE_SPEEDS);
713 if (ret) {
714 dev_err(pdata->dev, "invalid %s property\n",
715 XGBE_BLWC_PROPERTY);
716 return ret;
717 }
718 } else {
719 memcpy(phy_data->blwc, xgbe_phy_blwc,
720 sizeof(phy_data->blwc));
721 }
722
723 if (device_property_present(pdata->phy_dev, XGBE_CDR_RATE_PROPERTY)) {
724 ret = device_property_read_u32_array(pdata->phy_dev,
725 XGBE_CDR_RATE_PROPERTY,
726 phy_data->cdr_rate,
727 XGBE_SPEEDS);
728 if (ret) {
729 dev_err(pdata->dev, "invalid %s property\n",
730 XGBE_CDR_RATE_PROPERTY);
731 return ret;
732 }
733 } else {
734 memcpy(phy_data->cdr_rate, xgbe_phy_cdr_rate,
735 sizeof(phy_data->cdr_rate));
736 }
737
738 if (device_property_present(pdata->phy_dev, XGBE_PQ_SKEW_PROPERTY)) {
739 ret = device_property_read_u32_array(pdata->phy_dev,
740 XGBE_PQ_SKEW_PROPERTY,
741 phy_data->pq_skew,
742 XGBE_SPEEDS);
743 if (ret) {
744 dev_err(pdata->dev, "invalid %s property\n",
745 XGBE_PQ_SKEW_PROPERTY);
746 return ret;
747 }
748 } else {
749 memcpy(phy_data->pq_skew, xgbe_phy_pq_skew,
750 sizeof(phy_data->pq_skew));
751 }
752
753 if (device_property_present(pdata->phy_dev, XGBE_TX_AMP_PROPERTY)) {
754 ret = device_property_read_u32_array(pdata->phy_dev,
755 XGBE_TX_AMP_PROPERTY,
756 phy_data->tx_amp,
757 XGBE_SPEEDS);
758 if (ret) {
759 dev_err(pdata->dev, "invalid %s property\n",
760 XGBE_TX_AMP_PROPERTY);
761 return ret;
762 }
763 } else {
764 memcpy(phy_data->tx_amp, xgbe_phy_tx_amp,
765 sizeof(phy_data->tx_amp));
766 }
767
768 if (device_property_present(pdata->phy_dev, XGBE_DFE_CFG_PROPERTY)) {
769 ret = device_property_read_u32_array(pdata->phy_dev,
770 XGBE_DFE_CFG_PROPERTY,
771 phy_data->dfe_tap_cfg,
772 XGBE_SPEEDS);
773 if (ret) {
774 dev_err(pdata->dev, "invalid %s property\n",
775 XGBE_DFE_CFG_PROPERTY);
776 return ret;
777 }
778 } else {
779 memcpy(phy_data->dfe_tap_cfg, xgbe_phy_dfe_tap_cfg,
780 sizeof(phy_data->dfe_tap_cfg));
781 }
782
783 if (device_property_present(pdata->phy_dev, XGBE_DFE_ENA_PROPERTY)) {
784 ret = device_property_read_u32_array(pdata->phy_dev,
785 XGBE_DFE_ENA_PROPERTY,
786 phy_data->dfe_tap_ena,
787 XGBE_SPEEDS);
788 if (ret) {
789 dev_err(pdata->dev, "invalid %s property\n",
790 XGBE_DFE_ENA_PROPERTY);
791 return ret;
792 }
793 } else {
794 memcpy(phy_data->dfe_tap_ena, xgbe_phy_dfe_tap_ena,
795 sizeof(phy_data->dfe_tap_ena));
796 }
797
798 /* Initialize supported features */
799 XGBE_ZERO_SUP(lks);
800 XGBE_SET_SUP(lks, Autoneg);
801 XGBE_SET_SUP(lks, Pause);
802 XGBE_SET_SUP(lks, Asym_Pause);
803 XGBE_SET_SUP(lks, Backplane);
804 XGBE_SET_SUP(lks, 10000baseKR_Full);
805 switch (phy_data->speed_set) {
806 case XGBE_SPEEDSET_1000_10000:
807 XGBE_SET_SUP(lks, 1000baseKX_Full);
808 break;
809 case XGBE_SPEEDSET_2500_10000:
810 XGBE_SET_SUP(lks, 2500baseX_Full);
811 break;
812 }
813
814 if (pdata->fec_ability & MDIO_PMA_10GBR_FECABLE_ABLE)
815 XGBE_SET_SUP(lks, 10000baseR_FEC);
816
817 pdata->phy_data = phy_data;
818
819 return 0;
820 }
821
xgbe_init_function_ptrs_phy_v1(struct xgbe_phy_if * phy_if)822 void xgbe_init_function_ptrs_phy_v1(struct xgbe_phy_if *phy_if)
823 {
824 struct xgbe_phy_impl_if *phy_impl = &phy_if->phy_impl;
825
826 phy_impl->init = xgbe_phy_init;
827 phy_impl->exit = xgbe_phy_exit;
828
829 phy_impl->reset = xgbe_phy_reset;
830 phy_impl->start = xgbe_phy_start;
831 phy_impl->stop = xgbe_phy_stop;
832
833 phy_impl->link_status = xgbe_phy_link_status;
834
835 phy_impl->valid_speed = xgbe_phy_valid_speed;
836
837 phy_impl->use_mode = xgbe_phy_use_mode;
838 phy_impl->set_mode = xgbe_phy_set_mode;
839 phy_impl->get_mode = xgbe_phy_get_mode;
840 phy_impl->switch_mode = xgbe_phy_switch_mode;
841 phy_impl->cur_mode = xgbe_phy_cur_mode;
842
843 phy_impl->an_mode = xgbe_phy_an_mode;
844
845 phy_impl->an_config = xgbe_phy_an_config;
846
847 phy_impl->an_advertising = xgbe_phy_an_advertising;
848
849 phy_impl->an_outcome = xgbe_phy_an_outcome;
850
851 phy_impl->kr_training_pre = xgbe_phy_kr_training_pre;
852 phy_impl->kr_training_post = xgbe_phy_kr_training_post;
853 }
854