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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2020 Synopsys, Inc. and/or its affiliates.
4 * Synopsys DesignWare XPCS helpers
5 *
6 * Author: Jose Abreu <Jose.Abreu@synopsys.com>
7 */
8
9#include <linux/delay.h>
10#include <linux/pcs/pcs-xpcs.h>
11#include <linux/mdio.h>
12#include <linux/phylink.h>
13#include <linux/workqueue.h>
14#include "pcs-xpcs.h"
15
16#define phylink_pcs_to_xpcs(pl_pcs) \
17 container_of((pl_pcs), struct dw_xpcs, pcs)
18
19static const int xpcs_usxgmii_features[] = {
20 ETHTOOL_LINK_MODE_Pause_BIT,
21 ETHTOOL_LINK_MODE_Asym_Pause_BIT,
22 ETHTOOL_LINK_MODE_Autoneg_BIT,
23 ETHTOOL_LINK_MODE_1000baseKX_Full_BIT,
24 ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT,
25 ETHTOOL_LINK_MODE_10000baseKR_Full_BIT,
26 ETHTOOL_LINK_MODE_2500baseX_Full_BIT,
27 __ETHTOOL_LINK_MODE_MASK_NBITS,
28};
29
30static const int xpcs_10gkr_features[] = {
31 ETHTOOL_LINK_MODE_Pause_BIT,
32 ETHTOOL_LINK_MODE_Asym_Pause_BIT,
33 ETHTOOL_LINK_MODE_10000baseKR_Full_BIT,
34 __ETHTOOL_LINK_MODE_MASK_NBITS,
35};
36
37static const int xpcs_xlgmii_features[] = {
38 ETHTOOL_LINK_MODE_Pause_BIT,
39 ETHTOOL_LINK_MODE_Asym_Pause_BIT,
40 ETHTOOL_LINK_MODE_25000baseCR_Full_BIT,
41 ETHTOOL_LINK_MODE_25000baseKR_Full_BIT,
42 ETHTOOL_LINK_MODE_25000baseSR_Full_BIT,
43 ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT,
44 ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT,
45 ETHTOOL_LINK_MODE_40000baseSR4_Full_BIT,
46 ETHTOOL_LINK_MODE_40000baseLR4_Full_BIT,
47 ETHTOOL_LINK_MODE_50000baseCR2_Full_BIT,
48 ETHTOOL_LINK_MODE_50000baseKR2_Full_BIT,
49 ETHTOOL_LINK_MODE_50000baseSR2_Full_BIT,
50 ETHTOOL_LINK_MODE_50000baseKR_Full_BIT,
51 ETHTOOL_LINK_MODE_50000baseSR_Full_BIT,
52 ETHTOOL_LINK_MODE_50000baseCR_Full_BIT,
53 ETHTOOL_LINK_MODE_50000baseLR_ER_FR_Full_BIT,
54 ETHTOOL_LINK_MODE_50000baseDR_Full_BIT,
55 ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT,
56 ETHTOOL_LINK_MODE_100000baseSR4_Full_BIT,
57 ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT,
58 ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT,
59 ETHTOOL_LINK_MODE_100000baseKR2_Full_BIT,
60 ETHTOOL_LINK_MODE_100000baseSR2_Full_BIT,
61 ETHTOOL_LINK_MODE_100000baseCR2_Full_BIT,
62 ETHTOOL_LINK_MODE_100000baseLR2_ER2_FR2_Full_BIT,
63 ETHTOOL_LINK_MODE_100000baseDR2_Full_BIT,
64 __ETHTOOL_LINK_MODE_MASK_NBITS,
65};
66
67static const int xpcs_10gbaser_features[] = {
68 ETHTOOL_LINK_MODE_Pause_BIT,
69 ETHTOOL_LINK_MODE_Asym_Pause_BIT,
70 ETHTOOL_LINK_MODE_10000baseSR_Full_BIT,
71 ETHTOOL_LINK_MODE_10000baseLR_Full_BIT,
72 ETHTOOL_LINK_MODE_10000baseLRM_Full_BIT,
73 ETHTOOL_LINK_MODE_10000baseER_Full_BIT,
74 __ETHTOOL_LINK_MODE_MASK_NBITS,
75};
76
77static const int xpcs_sgmii_features[] = {
78 ETHTOOL_LINK_MODE_Pause_BIT,
79 ETHTOOL_LINK_MODE_Asym_Pause_BIT,
80 ETHTOOL_LINK_MODE_Autoneg_BIT,
81 ETHTOOL_LINK_MODE_10baseT_Half_BIT,
82 ETHTOOL_LINK_MODE_10baseT_Full_BIT,
83 ETHTOOL_LINK_MODE_100baseT_Half_BIT,
84 ETHTOOL_LINK_MODE_100baseT_Full_BIT,
85 ETHTOOL_LINK_MODE_1000baseT_Half_BIT,
86 ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
87 __ETHTOOL_LINK_MODE_MASK_NBITS,
88};
89
90static const int xpcs_1000basex_features[] = {
91 ETHTOOL_LINK_MODE_Pause_BIT,
92 ETHTOOL_LINK_MODE_Asym_Pause_BIT,
93 ETHTOOL_LINK_MODE_Autoneg_BIT,
94 ETHTOOL_LINK_MODE_1000baseX_Full_BIT,
95 __ETHTOOL_LINK_MODE_MASK_NBITS,
96};
97
98static const int xpcs_2500basex_features[] = {
99 ETHTOOL_LINK_MODE_Pause_BIT,
100 ETHTOOL_LINK_MODE_Asym_Pause_BIT,
101 ETHTOOL_LINK_MODE_Autoneg_BIT,
102 ETHTOOL_LINK_MODE_2500baseX_Full_BIT,
103 ETHTOOL_LINK_MODE_2500baseT_Full_BIT,
104 __ETHTOOL_LINK_MODE_MASK_NBITS,
105};
106
107static const phy_interface_t xpcs_usxgmii_interfaces[] = {
108 PHY_INTERFACE_MODE_USXGMII,
109};
110
111static const phy_interface_t xpcs_10gkr_interfaces[] = {
112 PHY_INTERFACE_MODE_10GKR,
113};
114
115static const phy_interface_t xpcs_xlgmii_interfaces[] = {
116 PHY_INTERFACE_MODE_XLGMII,
117};
118
119static const phy_interface_t xpcs_10gbaser_interfaces[] = {
120 PHY_INTERFACE_MODE_10GBASER,
121};
122
123static const phy_interface_t xpcs_sgmii_interfaces[] = {
124 PHY_INTERFACE_MODE_SGMII,
125};
126
127static const phy_interface_t xpcs_1000basex_interfaces[] = {
128 PHY_INTERFACE_MODE_1000BASEX,
129};
130
131static const phy_interface_t xpcs_2500basex_interfaces[] = {
132 PHY_INTERFACE_MODE_2500BASEX,
133 PHY_INTERFACE_MODE_MAX,
134};
135
136enum {
137 DW_XPCS_USXGMII,
138 DW_XPCS_10GKR,
139 DW_XPCS_XLGMII,
140 DW_XPCS_10GBASER,
141 DW_XPCS_SGMII,
142 DW_XPCS_1000BASEX,
143 DW_XPCS_2500BASEX,
144 DW_XPCS_INTERFACE_MAX,
145};
146
147struct xpcs_compat {
148 const int *supported;
149 const phy_interface_t *interface;
150 int num_interfaces;
151 int an_mode;
152 int (*pma_config)(struct dw_xpcs *xpcs);
153};
154
155struct xpcs_id {
156 u32 id;
157 u32 mask;
158 const struct xpcs_compat *compat;
159};
160
161static const struct xpcs_compat *xpcs_find_compat(const struct xpcs_id *id,
162 phy_interface_t interface)
163{
164 int i, j;
165
166 for (i = 0; i < DW_XPCS_INTERFACE_MAX; i++) {
167 const struct xpcs_compat *compat = &id->compat[i];
168
169 for (j = 0; j < compat->num_interfaces; j++)
170 if (compat->interface[j] == interface)
171 return compat;
172 }
173
174 return NULL;
175}
176
177int xpcs_get_an_mode(struct dw_xpcs *xpcs, phy_interface_t interface)
178{
179 const struct xpcs_compat *compat;
180
181 compat = xpcs_find_compat(xpcs->id, interface);
182 if (!compat)
183 return -ENODEV;
184
185 return compat->an_mode;
186}
187EXPORT_SYMBOL_GPL(xpcs_get_an_mode);
188
189static bool __xpcs_linkmode_supported(const struct xpcs_compat *compat,
190 enum ethtool_link_mode_bit_indices linkmode)
191{
192 int i;
193
194 for (i = 0; compat->supported[i] != __ETHTOOL_LINK_MODE_MASK_NBITS; i++)
195 if (compat->supported[i] == linkmode)
196 return true;
197
198 return false;
199}
200
201#define xpcs_linkmode_supported(compat, mode) \
202 __xpcs_linkmode_supported(compat, ETHTOOL_LINK_MODE_ ## mode ## _BIT)
203
204int xpcs_read(struct dw_xpcs *xpcs, int dev, u32 reg)
205{
206 return mdiodev_c45_read(xpcs->mdiodev, dev, reg);
207}
208
209int xpcs_write(struct dw_xpcs *xpcs, int dev, u32 reg, u16 val)
210{
211 return mdiodev_c45_write(xpcs->mdiodev, dev, reg, val);
212}
213
214static int xpcs_modify_changed(struct dw_xpcs *xpcs, int dev, u32 reg,
215 u16 mask, u16 set)
216{
217 return mdiodev_c45_modify_changed(xpcs->mdiodev, dev, reg, mask, set);
218}
219
220static int xpcs_read_vendor(struct dw_xpcs *xpcs, int dev, u32 reg)
221{
222 return xpcs_read(xpcs, dev, DW_VENDOR | reg);
223}
224
225static int xpcs_write_vendor(struct dw_xpcs *xpcs, int dev, int reg,
226 u16 val)
227{
228 return xpcs_write(xpcs, dev, DW_VENDOR | reg, val);
229}
230
231int xpcs_read_vpcs(struct dw_xpcs *xpcs, int reg)
232{
233 return xpcs_read_vendor(xpcs, MDIO_MMD_PCS, reg);
234}
235
236int xpcs_write_vpcs(struct dw_xpcs *xpcs, int reg, u16 val)
237{
238 return xpcs_write_vendor(xpcs, MDIO_MMD_PCS, reg, val);
239}
240
241static int xpcs_dev_flag(struct dw_xpcs *xpcs)
242{
243 int ret, oui;
244
245 ret = xpcs_read(xpcs, MDIO_MMD_PMAPMD, MDIO_DEVID1);
246 if (ret < 0)
247 return ret;
248
249 oui = ret;
250
251 ret = xpcs_read(xpcs, MDIO_MMD_PMAPMD, MDIO_DEVID2);
252 if (ret < 0)
253 return ret;
254
255 ret = (ret >> 10) & 0x3F;
256 oui |= ret << 16;
257
258 if (oui == DW_OUI_WX)
259 xpcs->dev_flag = DW_DEV_TXGBE;
260
261 return 0;
262}
263
264static int xpcs_poll_reset(struct dw_xpcs *xpcs, int dev)
265{
266 /* Poll until the reset bit clears (50ms per retry == 0.6 sec) */
267 unsigned int retries = 12;
268 int ret;
269
270 do {
271 msleep(50);
272 ret = xpcs_read(xpcs, dev, MDIO_CTRL1);
273 if (ret < 0)
274 return ret;
275 } while (ret & MDIO_CTRL1_RESET && --retries);
276
277 return (ret & MDIO_CTRL1_RESET) ? -ETIMEDOUT : 0;
278}
279
280static int xpcs_soft_reset(struct dw_xpcs *xpcs,
281 const struct xpcs_compat *compat)
282{
283 int ret, dev;
284
285 switch (compat->an_mode) {
286 case DW_AN_C73:
287 case DW_10GBASER:
288 dev = MDIO_MMD_PCS;
289 break;
290 case DW_AN_C37_SGMII:
291 case DW_2500BASEX:
292 case DW_AN_C37_1000BASEX:
293 dev = MDIO_MMD_VEND2;
294 break;
295 default:
296 return -1;
297 }
298
299 ret = xpcs_write(xpcs, dev, MDIO_CTRL1, MDIO_CTRL1_RESET);
300 if (ret < 0)
301 return ret;
302
303 return xpcs_poll_reset(xpcs, dev);
304}
305
306#define xpcs_warn(__xpcs, __state, __args...) \
307({ \
308 if ((__state)->link) \
309 dev_warn(&(__xpcs)->mdiodev->dev, ##__args); \
310})
311
312static int xpcs_read_fault_c73(struct dw_xpcs *xpcs,
313 struct phylink_link_state *state,
314 u16 pcs_stat1)
315{
316 int ret;
317
318 if (pcs_stat1 & MDIO_STAT1_FAULT) {
319 xpcs_warn(xpcs, state, "Link fault condition detected!\n");
320 return -EFAULT;
321 }
322
323 ret = xpcs_read(xpcs, MDIO_MMD_PCS, MDIO_STAT2);
324 if (ret < 0)
325 return ret;
326
327 if (ret & MDIO_STAT2_RXFAULT)
328 xpcs_warn(xpcs, state, "Receiver fault detected!\n");
329 if (ret & MDIO_STAT2_TXFAULT)
330 xpcs_warn(xpcs, state, "Transmitter fault detected!\n");
331
332 ret = xpcs_read_vendor(xpcs, MDIO_MMD_PCS, DW_VR_XS_PCS_DIG_STS);
333 if (ret < 0)
334 return ret;
335
336 if (ret & DW_RXFIFO_ERR) {
337 xpcs_warn(xpcs, state, "FIFO fault condition detected!\n");
338 return -EFAULT;
339 }
340
341 ret = xpcs_read(xpcs, MDIO_MMD_PCS, MDIO_PCS_10GBRT_STAT1);
342 if (ret < 0)
343 return ret;
344
345 if (!(ret & MDIO_PCS_10GBRT_STAT1_BLKLK))
346 xpcs_warn(xpcs, state, "Link is not locked!\n");
347
348 ret = xpcs_read(xpcs, MDIO_MMD_PCS, MDIO_PCS_10GBRT_STAT2);
349 if (ret < 0)
350 return ret;
351
352 if (ret & MDIO_PCS_10GBRT_STAT2_ERR) {
353 xpcs_warn(xpcs, state, "Link has errors!\n");
354 return -EFAULT;
355 }
356
357 return 0;
358}
359
360static void xpcs_config_usxgmii(struct dw_xpcs *xpcs, int speed)
361{
362 int ret, speed_sel;
363
364 switch (speed) {
365 case SPEED_10:
366 speed_sel = DW_USXGMII_10;
367 break;
368 case SPEED_100:
369 speed_sel = DW_USXGMII_100;
370 break;
371 case SPEED_1000:
372 speed_sel = DW_USXGMII_1000;
373 break;
374 case SPEED_2500:
375 speed_sel = DW_USXGMII_2500;
376 break;
377 case SPEED_5000:
378 speed_sel = DW_USXGMII_5000;
379 break;
380 case SPEED_10000:
381 speed_sel = DW_USXGMII_10000;
382 break;
383 default:
384 /* Nothing to do here */
385 return;
386 }
387
388 ret = xpcs_read_vpcs(xpcs, MDIO_CTRL1);
389 if (ret < 0)
390 goto out;
391
392 ret = xpcs_write_vpcs(xpcs, MDIO_CTRL1, ret | DW_USXGMII_EN);
393 if (ret < 0)
394 goto out;
395
396 ret = xpcs_read(xpcs, MDIO_MMD_VEND2, MDIO_CTRL1);
397 if (ret < 0)
398 goto out;
399
400 ret &= ~DW_USXGMII_SS_MASK;
401 ret |= speed_sel | DW_USXGMII_FULL;
402
403 ret = xpcs_write(xpcs, MDIO_MMD_VEND2, MDIO_CTRL1, ret);
404 if (ret < 0)
405 goto out;
406
407 ret = xpcs_read_vpcs(xpcs, MDIO_CTRL1);
408 if (ret < 0)
409 goto out;
410
411 ret = xpcs_write_vpcs(xpcs, MDIO_CTRL1, ret | DW_USXGMII_RST);
412 if (ret < 0)
413 goto out;
414
415 return;
416
417out:
418 pr_err("%s: XPCS access returned %pe\n", __func__, ERR_PTR(ret));
419}
420
421static int _xpcs_config_aneg_c73(struct dw_xpcs *xpcs,
422 const struct xpcs_compat *compat)
423{
424 int ret, adv;
425
426 /* By default, in USXGMII mode XPCS operates at 10G baud and
427 * replicates data to achieve lower speeds. Hereby, in this
428 * default configuration we need to advertise all supported
429 * modes and not only the ones we want to use.
430 */
431
432 /* SR_AN_ADV3 */
433 adv = 0;
434 if (xpcs_linkmode_supported(compat, 2500baseX_Full))
435 adv |= DW_C73_2500KX;
436
437 /* TODO: 5000baseKR */
438
439 ret = xpcs_write(xpcs, MDIO_MMD_AN, DW_SR_AN_ADV3, adv);
440 if (ret < 0)
441 return ret;
442
443 /* SR_AN_ADV2 */
444 adv = 0;
445 if (xpcs_linkmode_supported(compat, 1000baseKX_Full))
446 adv |= DW_C73_1000KX;
447 if (xpcs_linkmode_supported(compat, 10000baseKX4_Full))
448 adv |= DW_C73_10000KX4;
449 if (xpcs_linkmode_supported(compat, 10000baseKR_Full))
450 adv |= DW_C73_10000KR;
451
452 ret = xpcs_write(xpcs, MDIO_MMD_AN, DW_SR_AN_ADV2, adv);
453 if (ret < 0)
454 return ret;
455
456 /* SR_AN_ADV1 */
457 adv = DW_C73_AN_ADV_SF;
458 if (xpcs_linkmode_supported(compat, Pause))
459 adv |= DW_C73_PAUSE;
460 if (xpcs_linkmode_supported(compat, Asym_Pause))
461 adv |= DW_C73_ASYM_PAUSE;
462
463 return xpcs_write(xpcs, MDIO_MMD_AN, DW_SR_AN_ADV1, adv);
464}
465
466static int xpcs_config_aneg_c73(struct dw_xpcs *xpcs,
467 const struct xpcs_compat *compat)
468{
469 int ret;
470
471 ret = _xpcs_config_aneg_c73(xpcs, compat);
472 if (ret < 0)
473 return ret;
474
475 ret = xpcs_read(xpcs, MDIO_MMD_AN, MDIO_CTRL1);
476 if (ret < 0)
477 return ret;
478
479 ret |= MDIO_AN_CTRL1_ENABLE | MDIO_AN_CTRL1_RESTART;
480
481 return xpcs_write(xpcs, MDIO_MMD_AN, MDIO_CTRL1, ret);
482}
483
484static int xpcs_aneg_done_c73(struct dw_xpcs *xpcs,
485 struct phylink_link_state *state,
486 const struct xpcs_compat *compat, u16 an_stat1)
487{
488 int ret;
489
490 if (an_stat1 & MDIO_AN_STAT1_COMPLETE) {
491 ret = xpcs_read(xpcs, MDIO_MMD_AN, MDIO_AN_LPA);
492 if (ret < 0)
493 return ret;
494
495 /* Check if Aneg outcome is valid */
496 if (!(ret & DW_C73_AN_ADV_SF)) {
497 xpcs_config_aneg_c73(xpcs, compat);
498 return 0;
499 }
500
501 return 1;
502 }
503
504 return 0;
505}
506
507static int xpcs_read_lpa_c73(struct dw_xpcs *xpcs,
508 struct phylink_link_state *state, u16 an_stat1)
509{
510 u16 lpa[3];
511 int i, ret;
512
513 if (!(an_stat1 & MDIO_AN_STAT1_LPABLE)) {
514 phylink_clear(state->lp_advertising, Autoneg);
515 return 0;
516 }
517
518 phylink_set(state->lp_advertising, Autoneg);
519
520 /* Read Clause 73 link partner advertisement */
521 for (i = ARRAY_SIZE(lpa); --i >= 0; ) {
522 ret = xpcs_read(xpcs, MDIO_MMD_AN, MDIO_AN_LPA + i);
523 if (ret < 0)
524 return ret;
525
526 lpa[i] = ret;
527 }
528
529 mii_c73_mod_linkmode(state->lp_advertising, lpa);
530
531 return 0;
532}
533
534static int xpcs_get_max_xlgmii_speed(struct dw_xpcs *xpcs,
535 struct phylink_link_state *state)
536{
537 unsigned long *adv = state->advertising;
538 int speed = SPEED_UNKNOWN;
539 int bit;
540
541 for_each_set_bit(bit, adv, __ETHTOOL_LINK_MODE_MASK_NBITS) {
542 int new_speed = SPEED_UNKNOWN;
543
544 switch (bit) {
545 case ETHTOOL_LINK_MODE_25000baseCR_Full_BIT:
546 case ETHTOOL_LINK_MODE_25000baseKR_Full_BIT:
547 case ETHTOOL_LINK_MODE_25000baseSR_Full_BIT:
548 new_speed = SPEED_25000;
549 break;
550 case ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT:
551 case ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT:
552 case ETHTOOL_LINK_MODE_40000baseSR4_Full_BIT:
553 case ETHTOOL_LINK_MODE_40000baseLR4_Full_BIT:
554 new_speed = SPEED_40000;
555 break;
556 case ETHTOOL_LINK_MODE_50000baseCR2_Full_BIT:
557 case ETHTOOL_LINK_MODE_50000baseKR2_Full_BIT:
558 case ETHTOOL_LINK_MODE_50000baseSR2_Full_BIT:
559 case ETHTOOL_LINK_MODE_50000baseKR_Full_BIT:
560 case ETHTOOL_LINK_MODE_50000baseSR_Full_BIT:
561 case ETHTOOL_LINK_MODE_50000baseCR_Full_BIT:
562 case ETHTOOL_LINK_MODE_50000baseLR_ER_FR_Full_BIT:
563 case ETHTOOL_LINK_MODE_50000baseDR_Full_BIT:
564 new_speed = SPEED_50000;
565 break;
566 case ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT:
567 case ETHTOOL_LINK_MODE_100000baseSR4_Full_BIT:
568 case ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT:
569 case ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT:
570 case ETHTOOL_LINK_MODE_100000baseKR2_Full_BIT:
571 case ETHTOOL_LINK_MODE_100000baseSR2_Full_BIT:
572 case ETHTOOL_LINK_MODE_100000baseCR2_Full_BIT:
573 case ETHTOOL_LINK_MODE_100000baseLR2_ER2_FR2_Full_BIT:
574 case ETHTOOL_LINK_MODE_100000baseDR2_Full_BIT:
575 new_speed = SPEED_100000;
576 break;
577 default:
578 continue;
579 }
580
581 if (new_speed > speed)
582 speed = new_speed;
583 }
584
585 return speed;
586}
587
588static void xpcs_resolve_pma(struct dw_xpcs *xpcs,
589 struct phylink_link_state *state)
590{
591 state->pause = MLO_PAUSE_TX | MLO_PAUSE_RX;
592 state->duplex = DUPLEX_FULL;
593
594 switch (state->interface) {
595 case PHY_INTERFACE_MODE_10GKR:
596 state->speed = SPEED_10000;
597 break;
598 case PHY_INTERFACE_MODE_XLGMII:
599 state->speed = xpcs_get_max_xlgmii_speed(xpcs, state);
600 break;
601 default:
602 state->speed = SPEED_UNKNOWN;
603 break;
604 }
605}
606
607static int xpcs_validate(struct phylink_pcs *pcs, unsigned long *supported,
608 const struct phylink_link_state *state)
609{
610 __ETHTOOL_DECLARE_LINK_MODE_MASK(xpcs_supported) = { 0, };
611 const struct xpcs_compat *compat;
612 struct dw_xpcs *xpcs;
613 int i;
614
615 xpcs = phylink_pcs_to_xpcs(pcs);
616 compat = xpcs_find_compat(xpcs->id, state->interface);
617
618 /* Populate the supported link modes for this PHY interface type.
619 * FIXME: what about the port modes and autoneg bit? This masks
620 * all those away.
621 */
622 if (compat)
623 for (i = 0; compat->supported[i] != __ETHTOOL_LINK_MODE_MASK_NBITS; i++)
624 set_bit(compat->supported[i], xpcs_supported);
625
626 linkmode_and(supported, supported, xpcs_supported);
627
628 return 0;
629}
630
631void xpcs_get_interfaces(struct dw_xpcs *xpcs, unsigned long *interfaces)
632{
633 int i, j;
634
635 for (i = 0; i < DW_XPCS_INTERFACE_MAX; i++) {
636 const struct xpcs_compat *compat = &xpcs->id->compat[i];
637
638 for (j = 0; j < compat->num_interfaces; j++)
639 if (compat->interface[j] < PHY_INTERFACE_MODE_MAX)
640 __set_bit(compat->interface[j], interfaces);
641 }
642}
643EXPORT_SYMBOL_GPL(xpcs_get_interfaces);
644
645int xpcs_config_eee(struct dw_xpcs *xpcs, int mult_fact_100ns, int enable)
646{
647 int ret;
648
649 ret = xpcs_read(xpcs, MDIO_MMD_VEND2, DW_VR_MII_EEE_MCTRL0);
650 if (ret < 0)
651 return ret;
652
653 if (enable) {
654 /* Enable EEE */
655 ret = DW_VR_MII_EEE_LTX_EN | DW_VR_MII_EEE_LRX_EN |
656 DW_VR_MII_EEE_TX_QUIET_EN | DW_VR_MII_EEE_RX_QUIET_EN |
657 DW_VR_MII_EEE_TX_EN_CTRL | DW_VR_MII_EEE_RX_EN_CTRL |
658 mult_fact_100ns << DW_VR_MII_EEE_MULT_FACT_100NS_SHIFT;
659 } else {
660 ret &= ~(DW_VR_MII_EEE_LTX_EN | DW_VR_MII_EEE_LRX_EN |
661 DW_VR_MII_EEE_TX_QUIET_EN | DW_VR_MII_EEE_RX_QUIET_EN |
662 DW_VR_MII_EEE_TX_EN_CTRL | DW_VR_MII_EEE_RX_EN_CTRL |
663 DW_VR_MII_EEE_MULT_FACT_100NS);
664 }
665
666 ret = xpcs_write(xpcs, MDIO_MMD_VEND2, DW_VR_MII_EEE_MCTRL0, ret);
667 if (ret < 0)
668 return ret;
669
670 ret = xpcs_read(xpcs, MDIO_MMD_VEND2, DW_VR_MII_EEE_MCTRL1);
671 if (ret < 0)
672 return ret;
673
674 if (enable)
675 ret |= DW_VR_MII_EEE_TRN_LPI;
676 else
677 ret &= ~DW_VR_MII_EEE_TRN_LPI;
678
679 return xpcs_write(xpcs, MDIO_MMD_VEND2, DW_VR_MII_EEE_MCTRL1, ret);
680}
681EXPORT_SYMBOL_GPL(xpcs_config_eee);
682
683static int xpcs_config_aneg_c37_sgmii(struct dw_xpcs *xpcs,
684 unsigned int neg_mode)
685{
686 int ret, mdio_ctrl, tx_conf;
687
688 if (xpcs->dev_flag == DW_DEV_TXGBE)
689 xpcs_write_vpcs(xpcs, DW_VR_XS_PCS_DIG_CTRL1, DW_CL37_BP | DW_EN_VSMMD1);
690
691 /* For AN for C37 SGMII mode, the settings are :-
692 * 1) VR_MII_MMD_CTRL Bit(12) [AN_ENABLE] = 0b (Disable SGMII AN in case
693 it is already enabled)
694 * 2) VR_MII_AN_CTRL Bit(2:1)[PCS_MODE] = 10b (SGMII AN)
695 * 3) VR_MII_AN_CTRL Bit(3) [TX_CONFIG] = 0b (MAC side SGMII)
696 * DW xPCS used with DW EQoS MAC is always MAC side SGMII.
697 * 4) VR_MII_DIG_CTRL1 Bit(9) [MAC_AUTO_SW] = 1b (Automatic
698 * speed/duplex mode change by HW after SGMII AN complete)
699 * 5) VR_MII_MMD_CTRL Bit(12) [AN_ENABLE] = 1b (Enable SGMII AN)
700 *
701 * Note: Since it is MAC side SGMII, there is no need to set
702 * SR_MII_AN_ADV. MAC side SGMII receives AN Tx Config from
703 * PHY about the link state change after C28 AN is completed
704 * between PHY and Link Partner. There is also no need to
705 * trigger AN restart for MAC-side SGMII.
706 */
707 mdio_ctrl = xpcs_read(xpcs, MDIO_MMD_VEND2, DW_VR_MII_MMD_CTRL);
708 if (mdio_ctrl < 0)
709 return mdio_ctrl;
710
711 if (mdio_ctrl & AN_CL37_EN) {
712 ret = xpcs_write(xpcs, MDIO_MMD_VEND2, DW_VR_MII_MMD_CTRL,
713 mdio_ctrl & ~AN_CL37_EN);
714 if (ret < 0)
715 return ret;
716 }
717
718 ret = xpcs_read(xpcs, MDIO_MMD_VEND2, DW_VR_MII_AN_CTRL);
719 if (ret < 0)
720 return ret;
721
722 ret &= ~(DW_VR_MII_PCS_MODE_MASK | DW_VR_MII_TX_CONFIG_MASK);
723 ret |= (DW_VR_MII_PCS_MODE_C37_SGMII <<
724 DW_VR_MII_AN_CTRL_PCS_MODE_SHIFT &
725 DW_VR_MII_PCS_MODE_MASK);
726 if (xpcs->dev_flag == DW_DEV_TXGBE) {
727 ret |= DW_VR_MII_AN_CTRL_8BIT;
728 /* Hardware requires it to be PHY side SGMII */
729 tx_conf = DW_VR_MII_TX_CONFIG_PHY_SIDE_SGMII;
730 } else {
731 tx_conf = DW_VR_MII_TX_CONFIG_MAC_SIDE_SGMII;
732 }
733 ret |= tx_conf << DW_VR_MII_AN_CTRL_TX_CONFIG_SHIFT &
734 DW_VR_MII_TX_CONFIG_MASK;
735 ret = xpcs_write(xpcs, MDIO_MMD_VEND2, DW_VR_MII_AN_CTRL, ret);
736 if (ret < 0)
737 return ret;
738
739 ret = xpcs_read(xpcs, MDIO_MMD_VEND2, DW_VR_MII_DIG_CTRL1);
740 if (ret < 0)
741 return ret;
742
743 if (neg_mode == PHYLINK_PCS_NEG_INBAND_ENABLED)
744 ret |= DW_VR_MII_DIG_CTRL1_MAC_AUTO_SW;
745 else
746 ret &= ~DW_VR_MII_DIG_CTRL1_MAC_AUTO_SW;
747
748 if (xpcs->dev_flag == DW_DEV_TXGBE)
749 ret |= DW_VR_MII_DIG_CTRL1_PHY_MODE_CTRL;
750
751 ret = xpcs_write(xpcs, MDIO_MMD_VEND2, DW_VR_MII_DIG_CTRL1, ret);
752 if (ret < 0)
753 return ret;
754
755 if (neg_mode == PHYLINK_PCS_NEG_INBAND_ENABLED)
756 ret = xpcs_write(xpcs, MDIO_MMD_VEND2, DW_VR_MII_MMD_CTRL,
757 mdio_ctrl | AN_CL37_EN);
758
759 return ret;
760}
761
762static int xpcs_config_aneg_c37_1000basex(struct dw_xpcs *xpcs,
763 unsigned int neg_mode,
764 const unsigned long *advertising)
765{
766 phy_interface_t interface = PHY_INTERFACE_MODE_1000BASEX;
767 int ret, mdio_ctrl, adv;
768 bool changed = 0;
769
770 if (xpcs->dev_flag == DW_DEV_TXGBE)
771 xpcs_write_vpcs(xpcs, DW_VR_XS_PCS_DIG_CTRL1, DW_CL37_BP | DW_EN_VSMMD1);
772
773 /* According to Chap 7.12, to set 1000BASE-X C37 AN, AN must
774 * be disabled first:-
775 * 1) VR_MII_MMD_CTRL Bit(12)[AN_ENABLE] = 0b
776 * 2) VR_MII_AN_CTRL Bit(2:1)[PCS_MODE] = 00b (1000BASE-X C37)
777 */
778 mdio_ctrl = xpcs_read(xpcs, MDIO_MMD_VEND2, DW_VR_MII_MMD_CTRL);
779 if (mdio_ctrl < 0)
780 return mdio_ctrl;
781
782 if (mdio_ctrl & AN_CL37_EN) {
783 ret = xpcs_write(xpcs, MDIO_MMD_VEND2, DW_VR_MII_MMD_CTRL,
784 mdio_ctrl & ~AN_CL37_EN);
785 if (ret < 0)
786 return ret;
787 }
788
789 ret = xpcs_read(xpcs, MDIO_MMD_VEND2, DW_VR_MII_AN_CTRL);
790 if (ret < 0)
791 return ret;
792
793 ret &= ~DW_VR_MII_PCS_MODE_MASK;
794 if (!xpcs->pcs.poll)
795 ret |= DW_VR_MII_AN_INTR_EN;
796 ret = xpcs_write(xpcs, MDIO_MMD_VEND2, DW_VR_MII_AN_CTRL, ret);
797 if (ret < 0)
798 return ret;
799
800 /* Check for advertising changes and update the C45 MII ADV
801 * register accordingly.
802 */
803 adv = phylink_mii_c22_pcs_encode_advertisement(interface,
804 advertising);
805 if (adv >= 0) {
806 ret = xpcs_modify_changed(xpcs, MDIO_MMD_VEND2,
807 MII_ADVERTISE, 0xffff, adv);
808 if (ret < 0)
809 return ret;
810
811 changed = ret;
812 }
813
814 /* Clear CL37 AN complete status */
815 ret = xpcs_write(xpcs, MDIO_MMD_VEND2, DW_VR_MII_AN_INTR_STS, 0);
816 if (ret < 0)
817 return ret;
818
819 if (neg_mode == PHYLINK_PCS_NEG_INBAND_ENABLED) {
820 ret = xpcs_write(xpcs, MDIO_MMD_VEND2, DW_VR_MII_MMD_CTRL,
821 mdio_ctrl | AN_CL37_EN);
822 if (ret < 0)
823 return ret;
824 }
825
826 return changed;
827}
828
829static int xpcs_config_2500basex(struct dw_xpcs *xpcs)
830{
831 int ret;
832
833 ret = xpcs_read(xpcs, MDIO_MMD_VEND2, DW_VR_MII_DIG_CTRL1);
834 if (ret < 0)
835 return ret;
836 ret |= DW_VR_MII_DIG_CTRL1_2G5_EN;
837 ret &= ~DW_VR_MII_DIG_CTRL1_MAC_AUTO_SW;
838 ret = xpcs_write(xpcs, MDIO_MMD_VEND2, DW_VR_MII_DIG_CTRL1, ret);
839 if (ret < 0)
840 return ret;
841
842 ret = xpcs_read(xpcs, MDIO_MMD_VEND2, DW_VR_MII_MMD_CTRL);
843 if (ret < 0)
844 return ret;
845 ret &= ~AN_CL37_EN;
846 ret |= SGMII_SPEED_SS6;
847 ret &= ~SGMII_SPEED_SS13;
848 return xpcs_write(xpcs, MDIO_MMD_VEND2, DW_VR_MII_MMD_CTRL, ret);
849}
850
851int xpcs_do_config(struct dw_xpcs *xpcs, phy_interface_t interface,
852 const unsigned long *advertising, unsigned int neg_mode)
853{
854 const struct xpcs_compat *compat;
855 int ret;
856
857 compat = xpcs_find_compat(xpcs->id, interface);
858 if (!compat)
859 return -ENODEV;
860
861 if (xpcs->dev_flag == DW_DEV_TXGBE) {
862 ret = txgbe_xpcs_switch_mode(xpcs, interface);
863 if (ret)
864 return ret;
865 }
866
867 switch (compat->an_mode) {
868 case DW_10GBASER:
869 break;
870 case DW_AN_C73:
871 if (neg_mode == PHYLINK_PCS_NEG_INBAND_ENABLED) {
872 ret = xpcs_config_aneg_c73(xpcs, compat);
873 if (ret)
874 return ret;
875 }
876 break;
877 case DW_AN_C37_SGMII:
878 ret = xpcs_config_aneg_c37_sgmii(xpcs, neg_mode);
879 if (ret)
880 return ret;
881 break;
882 case DW_AN_C37_1000BASEX:
883 ret = xpcs_config_aneg_c37_1000basex(xpcs, neg_mode,
884 advertising);
885 if (ret)
886 return ret;
887 break;
888 case DW_2500BASEX:
889 ret = xpcs_config_2500basex(xpcs);
890 if (ret)
891 return ret;
892 break;
893 default:
894 return -1;
895 }
896
897 if (compat->pma_config) {
898 ret = compat->pma_config(xpcs);
899 if (ret)
900 return ret;
901 }
902
903 return 0;
904}
905EXPORT_SYMBOL_GPL(xpcs_do_config);
906
907static int xpcs_config(struct phylink_pcs *pcs, unsigned int neg_mode,
908 phy_interface_t interface,
909 const unsigned long *advertising,
910 bool permit_pause_to_mac)
911{
912 struct dw_xpcs *xpcs = phylink_pcs_to_xpcs(pcs);
913
914 return xpcs_do_config(xpcs, interface, advertising, neg_mode);
915}
916
917static int xpcs_get_state_c73(struct dw_xpcs *xpcs,
918 struct phylink_link_state *state,
919 const struct xpcs_compat *compat)
920{
921 bool an_enabled;
922 int pcs_stat1;
923 int an_stat1;
924 int ret;
925
926 /* The link status bit is latching-low, so it is important to
927 * avoid unnecessary re-reads of this register to avoid missing
928 * a link-down event.
929 */
930 pcs_stat1 = xpcs_read(xpcs, MDIO_MMD_PCS, MDIO_STAT1);
931 if (pcs_stat1 < 0) {
932 state->link = false;
933 return pcs_stat1;
934 }
935
936 /* Link needs to be read first ... */
937 state->link = !!(pcs_stat1 & MDIO_STAT1_LSTATUS);
938
939 /* ... and then we check the faults. */
940 ret = xpcs_read_fault_c73(xpcs, state, pcs_stat1);
941 if (ret) {
942 ret = xpcs_soft_reset(xpcs, compat);
943 if (ret)
944 return ret;
945
946 state->link = 0;
947
948 return xpcs_do_config(xpcs, state->interface, NULL,
949 PHYLINK_PCS_NEG_INBAND_ENABLED);
950 }
951
952 /* There is no point doing anything else if the link is down. */
953 if (!state->link)
954 return 0;
955
956 an_enabled = linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
957 state->advertising);
958 if (an_enabled) {
959 /* The link status bit is latching-low, so it is important to
960 * avoid unnecessary re-reads of this register to avoid missing
961 * a link-down event.
962 */
963 an_stat1 = xpcs_read(xpcs, MDIO_MMD_AN, MDIO_STAT1);
964 if (an_stat1 < 0) {
965 state->link = false;
966 return an_stat1;
967 }
968
969 state->an_complete = xpcs_aneg_done_c73(xpcs, state, compat,
970 an_stat1);
971 if (!state->an_complete) {
972 state->link = false;
973 return 0;
974 }
975
976 ret = xpcs_read_lpa_c73(xpcs, state, an_stat1);
977 if (ret < 0) {
978 state->link = false;
979 return ret;
980 }
981
982 phylink_resolve_c73(state);
983 } else {
984 xpcs_resolve_pma(xpcs, state);
985 }
986
987 return 0;
988}
989
990static int xpcs_get_state_c37_sgmii(struct dw_xpcs *xpcs,
991 struct phylink_link_state *state)
992{
993 int ret;
994
995 /* Reset link_state */
996 state->link = false;
997 state->speed = SPEED_UNKNOWN;
998 state->duplex = DUPLEX_UNKNOWN;
999 state->pause = 0;
1000
1001 /* For C37 SGMII mode, we check DW_VR_MII_AN_INTR_STS for link
1002 * status, speed and duplex.
1003 */
1004 ret = xpcs_read(xpcs, MDIO_MMD_VEND2, DW_VR_MII_AN_INTR_STS);
1005 if (ret < 0)
1006 return ret;
1007
1008 if (ret & DW_VR_MII_C37_ANSGM_SP_LNKSTS) {
1009 int speed_value;
1010
1011 state->link = true;
1012
1013 speed_value = (ret & DW_VR_MII_AN_STS_C37_ANSGM_SP) >>
1014 DW_VR_MII_AN_STS_C37_ANSGM_SP_SHIFT;
1015 if (speed_value == DW_VR_MII_C37_ANSGM_SP_1000)
1016 state->speed = SPEED_1000;
1017 else if (speed_value == DW_VR_MII_C37_ANSGM_SP_100)
1018 state->speed = SPEED_100;
1019 else
1020 state->speed = SPEED_10;
1021
1022 if (ret & DW_VR_MII_AN_STS_C37_ANSGM_FD)
1023 state->duplex = DUPLEX_FULL;
1024 else
1025 state->duplex = DUPLEX_HALF;
1026 } else if (ret == DW_VR_MII_AN_STS_C37_ANCMPLT_INTR) {
1027 int speed, duplex;
1028
1029 state->link = true;
1030
1031 speed = xpcs_read(xpcs, MDIO_MMD_VEND2, MDIO_CTRL1);
1032 if (speed < 0)
1033 return speed;
1034
1035 speed &= SGMII_SPEED_SS13 | SGMII_SPEED_SS6;
1036 if (speed == SGMII_SPEED_SS6)
1037 state->speed = SPEED_1000;
1038 else if (speed == SGMII_SPEED_SS13)
1039 state->speed = SPEED_100;
1040 else if (speed == 0)
1041 state->speed = SPEED_10;
1042
1043 duplex = xpcs_read(xpcs, MDIO_MMD_VEND2, MII_ADVERTISE);
1044 if (duplex < 0)
1045 return duplex;
1046
1047 if (duplex & DW_FULL_DUPLEX)
1048 state->duplex = DUPLEX_FULL;
1049 else if (duplex & DW_HALF_DUPLEX)
1050 state->duplex = DUPLEX_HALF;
1051
1052 xpcs_write(xpcs, MDIO_MMD_VEND2, DW_VR_MII_AN_INTR_STS, 0);
1053 }
1054
1055 return 0;
1056}
1057
1058static int xpcs_get_state_c37_1000basex(struct dw_xpcs *xpcs,
1059 struct phylink_link_state *state)
1060{
1061 int lpa, bmsr;
1062
1063 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
1064 state->advertising)) {
1065 /* Reset link state */
1066 state->link = false;
1067
1068 lpa = xpcs_read(xpcs, MDIO_MMD_VEND2, MII_LPA);
1069 if (lpa < 0 || lpa & LPA_RFAULT)
1070 return lpa;
1071
1072 bmsr = xpcs_read(xpcs, MDIO_MMD_VEND2, MII_BMSR);
1073 if (bmsr < 0)
1074 return bmsr;
1075
1076 /* Clear AN complete interrupt */
1077 if (!xpcs->pcs.poll) {
1078 int an_intr;
1079
1080 an_intr = xpcs_read(xpcs, MDIO_MMD_VEND2, DW_VR_MII_AN_INTR_STS);
1081 if (an_intr & DW_VR_MII_AN_STS_C37_ANCMPLT_INTR) {
1082 an_intr &= ~DW_VR_MII_AN_STS_C37_ANCMPLT_INTR;
1083 xpcs_write(xpcs, MDIO_MMD_VEND2, DW_VR_MII_AN_INTR_STS, an_intr);
1084 }
1085 }
1086
1087 phylink_mii_c22_pcs_decode_state(state, bmsr, lpa);
1088 }
1089
1090 return 0;
1091}
1092
1093static int xpcs_get_state_2500basex(struct dw_xpcs *xpcs,
1094 struct phylink_link_state *state)
1095{
1096 int ret;
1097
1098 ret = xpcs_read(xpcs, MDIO_MMD_VEND2, DW_VR_MII_MMD_STS);
1099 if (ret < 0) {
1100 state->link = 0;
1101 return ret;
1102 }
1103
1104 state->link = !!(ret & DW_VR_MII_MMD_STS_LINK_STS);
1105 if (!state->link)
1106 return 0;
1107
1108 state->speed = SPEED_2500;
1109 state->pause |= MLO_PAUSE_TX | MLO_PAUSE_RX;
1110 state->duplex = DUPLEX_FULL;
1111
1112 return 0;
1113}
1114
1115static void xpcs_get_state(struct phylink_pcs *pcs,
1116 struct phylink_link_state *state)
1117{
1118 struct dw_xpcs *xpcs = phylink_pcs_to_xpcs(pcs);
1119 const struct xpcs_compat *compat;
1120 int ret;
1121
1122 compat = xpcs_find_compat(xpcs->id, state->interface);
1123 if (!compat)
1124 return;
1125
1126 switch (compat->an_mode) {
1127 case DW_10GBASER:
1128 phylink_mii_c45_pcs_get_state(xpcs->mdiodev, state);
1129 break;
1130 case DW_AN_C73:
1131 ret = xpcs_get_state_c73(xpcs, state, compat);
1132 if (ret) {
1133 pr_err("xpcs_get_state_c73 returned %pe\n",
1134 ERR_PTR(ret));
1135 return;
1136 }
1137 break;
1138 case DW_AN_C37_SGMII:
1139 ret = xpcs_get_state_c37_sgmii(xpcs, state);
1140 if (ret) {
1141 pr_err("xpcs_get_state_c37_sgmii returned %pe\n",
1142 ERR_PTR(ret));
1143 }
1144 break;
1145 case DW_AN_C37_1000BASEX:
1146 ret = xpcs_get_state_c37_1000basex(xpcs, state);
1147 if (ret) {
1148 pr_err("xpcs_get_state_c37_1000basex returned %pe\n",
1149 ERR_PTR(ret));
1150 }
1151 break;
1152 case DW_2500BASEX:
1153 ret = xpcs_get_state_2500basex(xpcs, state);
1154 if (ret) {
1155 pr_err("xpcs_get_state_2500basex returned %pe\n",
1156 ERR_PTR(ret));
1157 }
1158 break;
1159 default:
1160 return;
1161 }
1162}
1163
1164static void xpcs_link_up_sgmii(struct dw_xpcs *xpcs, unsigned int neg_mode,
1165 int speed, int duplex)
1166{
1167 int val, ret;
1168
1169 if (neg_mode == PHYLINK_PCS_NEG_INBAND_ENABLED)
1170 return;
1171
1172 val = mii_bmcr_encode_fixed(speed, duplex);
1173 ret = xpcs_write(xpcs, MDIO_MMD_VEND2, MDIO_CTRL1, val);
1174 if (ret)
1175 pr_err("%s: xpcs_write returned %pe\n", __func__, ERR_PTR(ret));
1176}
1177
1178static void xpcs_link_up_1000basex(struct dw_xpcs *xpcs, unsigned int neg_mode,
1179 int speed, int duplex)
1180{
1181 int val, ret;
1182
1183 if (neg_mode == PHYLINK_PCS_NEG_INBAND_ENABLED)
1184 return;
1185
1186 switch (speed) {
1187 case SPEED_1000:
1188 val = BMCR_SPEED1000;
1189 break;
1190 case SPEED_100:
1191 case SPEED_10:
1192 default:
1193 pr_err("%s: speed = %d\n", __func__, speed);
1194 return;
1195 }
1196
1197 if (duplex == DUPLEX_FULL)
1198 val |= BMCR_FULLDPLX;
1199 else
1200 pr_err("%s: half duplex not supported\n", __func__);
1201
1202 ret = xpcs_write(xpcs, MDIO_MMD_VEND2, MDIO_CTRL1, val);
1203 if (ret)
1204 pr_err("%s: xpcs_write returned %pe\n", __func__, ERR_PTR(ret));
1205}
1206
1207void xpcs_link_up(struct phylink_pcs *pcs, unsigned int neg_mode,
1208 phy_interface_t interface, int speed, int duplex)
1209{
1210 struct dw_xpcs *xpcs = phylink_pcs_to_xpcs(pcs);
1211
1212 if (interface == PHY_INTERFACE_MODE_USXGMII)
1213 return xpcs_config_usxgmii(xpcs, speed);
1214 if (interface == PHY_INTERFACE_MODE_SGMII)
1215 return xpcs_link_up_sgmii(xpcs, neg_mode, speed, duplex);
1216 if (interface == PHY_INTERFACE_MODE_1000BASEX)
1217 return xpcs_link_up_1000basex(xpcs, neg_mode, speed, duplex);
1218}
1219EXPORT_SYMBOL_GPL(xpcs_link_up);
1220
1221static void xpcs_an_restart(struct phylink_pcs *pcs)
1222{
1223 struct dw_xpcs *xpcs = phylink_pcs_to_xpcs(pcs);
1224 int ret;
1225
1226 ret = xpcs_read(xpcs, MDIO_MMD_VEND2, MDIO_CTRL1);
1227 if (ret >= 0) {
1228 ret |= BMCR_ANRESTART;
1229 xpcs_write(xpcs, MDIO_MMD_VEND2, MDIO_CTRL1, ret);
1230 }
1231}
1232
1233static u32 xpcs_get_id(struct dw_xpcs *xpcs)
1234{
1235 int ret;
1236 u32 id;
1237
1238 /* First, search C73 PCS using PCS MMD */
1239 ret = xpcs_read(xpcs, MDIO_MMD_PCS, MII_PHYSID1);
1240 if (ret < 0)
1241 return 0xffffffff;
1242
1243 id = ret << 16;
1244
1245 ret = xpcs_read(xpcs, MDIO_MMD_PCS, MII_PHYSID2);
1246 if (ret < 0)
1247 return 0xffffffff;
1248
1249 /* If Device IDs are not all zeros or all ones,
1250 * we found C73 AN-type device
1251 */
1252 if ((id | ret) && (id | ret) != 0xffffffff)
1253 return id | ret;
1254
1255 /* Next, search C37 PCS using Vendor-Specific MII MMD */
1256 ret = xpcs_read(xpcs, MDIO_MMD_VEND2, MII_PHYSID1);
1257 if (ret < 0)
1258 return 0xffffffff;
1259
1260 id = ret << 16;
1261
1262 ret = xpcs_read(xpcs, MDIO_MMD_VEND2, MII_PHYSID2);
1263 if (ret < 0)
1264 return 0xffffffff;
1265
1266 /* If Device IDs are not all zeros, we found C37 AN-type device */
1267 if (id | ret)
1268 return id | ret;
1269
1270 return 0xffffffff;
1271}
1272
1273static const struct xpcs_compat synopsys_xpcs_compat[DW_XPCS_INTERFACE_MAX] = {
1274 [DW_XPCS_USXGMII] = {
1275 .supported = xpcs_usxgmii_features,
1276 .interface = xpcs_usxgmii_interfaces,
1277 .num_interfaces = ARRAY_SIZE(xpcs_usxgmii_interfaces),
1278 .an_mode = DW_AN_C73,
1279 },
1280 [DW_XPCS_10GKR] = {
1281 .supported = xpcs_10gkr_features,
1282 .interface = xpcs_10gkr_interfaces,
1283 .num_interfaces = ARRAY_SIZE(xpcs_10gkr_interfaces),
1284 .an_mode = DW_AN_C73,
1285 },
1286 [DW_XPCS_XLGMII] = {
1287 .supported = xpcs_xlgmii_features,
1288 .interface = xpcs_xlgmii_interfaces,
1289 .num_interfaces = ARRAY_SIZE(xpcs_xlgmii_interfaces),
1290 .an_mode = DW_AN_C73,
1291 },
1292 [DW_XPCS_10GBASER] = {
1293 .supported = xpcs_10gbaser_features,
1294 .interface = xpcs_10gbaser_interfaces,
1295 .num_interfaces = ARRAY_SIZE(xpcs_10gbaser_interfaces),
1296 .an_mode = DW_10GBASER,
1297 },
1298 [DW_XPCS_SGMII] = {
1299 .supported = xpcs_sgmii_features,
1300 .interface = xpcs_sgmii_interfaces,
1301 .num_interfaces = ARRAY_SIZE(xpcs_sgmii_interfaces),
1302 .an_mode = DW_AN_C37_SGMII,
1303 },
1304 [DW_XPCS_1000BASEX] = {
1305 .supported = xpcs_1000basex_features,
1306 .interface = xpcs_1000basex_interfaces,
1307 .num_interfaces = ARRAY_SIZE(xpcs_1000basex_interfaces),
1308 .an_mode = DW_AN_C37_1000BASEX,
1309 },
1310 [DW_XPCS_2500BASEX] = {
1311 .supported = xpcs_2500basex_features,
1312 .interface = xpcs_2500basex_interfaces,
1313 .num_interfaces = ARRAY_SIZE(xpcs_2500basex_interfaces),
1314 .an_mode = DW_2500BASEX,
1315 },
1316};
1317
1318static const struct xpcs_compat nxp_sja1105_xpcs_compat[DW_XPCS_INTERFACE_MAX] = {
1319 [DW_XPCS_SGMII] = {
1320 .supported = xpcs_sgmii_features,
1321 .interface = xpcs_sgmii_interfaces,
1322 .num_interfaces = ARRAY_SIZE(xpcs_sgmii_interfaces),
1323 .an_mode = DW_AN_C37_SGMII,
1324 .pma_config = nxp_sja1105_sgmii_pma_config,
1325 },
1326};
1327
1328static const struct xpcs_compat nxp_sja1110_xpcs_compat[DW_XPCS_INTERFACE_MAX] = {
1329 [DW_XPCS_SGMII] = {
1330 .supported = xpcs_sgmii_features,
1331 .interface = xpcs_sgmii_interfaces,
1332 .num_interfaces = ARRAY_SIZE(xpcs_sgmii_interfaces),
1333 .an_mode = DW_AN_C37_SGMII,
1334 .pma_config = nxp_sja1110_sgmii_pma_config,
1335 },
1336 [DW_XPCS_2500BASEX] = {
1337 .supported = xpcs_2500basex_features,
1338 .interface = xpcs_2500basex_interfaces,
1339 .num_interfaces = ARRAY_SIZE(xpcs_2500basex_interfaces),
1340 .an_mode = DW_2500BASEX,
1341 .pma_config = nxp_sja1110_2500basex_pma_config,
1342 },
1343};
1344
1345static const struct xpcs_id xpcs_id_list[] = {
1346 {
1347 .id = SYNOPSYS_XPCS_ID,
1348 .mask = SYNOPSYS_XPCS_MASK,
1349 .compat = synopsys_xpcs_compat,
1350 }, {
1351 .id = NXP_SJA1105_XPCS_ID,
1352 .mask = SYNOPSYS_XPCS_MASK,
1353 .compat = nxp_sja1105_xpcs_compat,
1354 }, {
1355 .id = NXP_SJA1110_XPCS_ID,
1356 .mask = SYNOPSYS_XPCS_MASK,
1357 .compat = nxp_sja1110_xpcs_compat,
1358 },
1359};
1360
1361static const struct phylink_pcs_ops xpcs_phylink_ops = {
1362 .pcs_validate = xpcs_validate,
1363 .pcs_config = xpcs_config,
1364 .pcs_get_state = xpcs_get_state,
1365 .pcs_an_restart = xpcs_an_restart,
1366 .pcs_link_up = xpcs_link_up,
1367};
1368
1369static struct dw_xpcs *xpcs_create(struct mdio_device *mdiodev,
1370 phy_interface_t interface)
1371{
1372 struct dw_xpcs *xpcs;
1373 u32 xpcs_id;
1374 int i, ret;
1375
1376 xpcs = kzalloc(sizeof(*xpcs), GFP_KERNEL);
1377 if (!xpcs)
1378 return ERR_PTR(-ENOMEM);
1379
1380 mdio_device_get(mdiodev);
1381 xpcs->mdiodev = mdiodev;
1382
1383 xpcs_id = xpcs_get_id(xpcs);
1384
1385 for (i = 0; i < ARRAY_SIZE(xpcs_id_list); i++) {
1386 const struct xpcs_id *entry = &xpcs_id_list[i];
1387 const struct xpcs_compat *compat;
1388
1389 if ((xpcs_id & entry->mask) != entry->id)
1390 continue;
1391
1392 xpcs->id = entry;
1393
1394 compat = xpcs_find_compat(entry, interface);
1395 if (!compat) {
1396 ret = -ENODEV;
1397 goto out;
1398 }
1399
1400 ret = xpcs_dev_flag(xpcs);
1401 if (ret)
1402 goto out;
1403
1404 xpcs->pcs.ops = &xpcs_phylink_ops;
1405 xpcs->pcs.neg_mode = true;
1406
1407 if (xpcs->dev_flag != DW_DEV_TXGBE) {
1408 xpcs->pcs.poll = true;
1409
1410 ret = xpcs_soft_reset(xpcs, compat);
1411 if (ret)
1412 goto out;
1413 }
1414
1415 return xpcs;
1416 }
1417
1418 ret = -ENODEV;
1419
1420out:
1421 mdio_device_put(mdiodev);
1422 kfree(xpcs);
1423
1424 return ERR_PTR(ret);
1425}
1426
1427void xpcs_destroy(struct dw_xpcs *xpcs)
1428{
1429 if (xpcs)
1430 mdio_device_put(xpcs->mdiodev);
1431 kfree(xpcs);
1432}
1433EXPORT_SYMBOL_GPL(xpcs_destroy);
1434
1435struct dw_xpcs *xpcs_create_mdiodev(struct mii_bus *bus, int addr,
1436 phy_interface_t interface)
1437{
1438 struct mdio_device *mdiodev;
1439 struct dw_xpcs *xpcs;
1440
1441 mdiodev = mdio_device_create(bus, addr);
1442 if (IS_ERR(mdiodev))
1443 return ERR_CAST(mdiodev);
1444
1445 xpcs = xpcs_create(mdiodev, interface);
1446
1447 /* xpcs_create() has taken a refcount on the mdiodev if it was
1448 * successful. If xpcs_create() fails, this will free the mdio
1449 * device here. In any case, we don't need to hold our reference
1450 * anymore, and putting it here will allow mdio_device_put() in
1451 * xpcs_destroy() to automatically free the mdio device.
1452 */
1453 mdio_device_put(mdiodev);
1454
1455 return xpcs;
1456}
1457EXPORT_SYMBOL_GPL(xpcs_create_mdiodev);
1458
1459MODULE_LICENSE("GPL v2");
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (c) 2020 Synopsys, Inc. and/or its affiliates.
4 * Synopsys DesignWare XPCS helpers
5 *
6 * Author: Jose Abreu <Jose.Abreu@synopsys.com>
7 */
8
9#include <linux/delay.h>
10#include <linux/pcs/pcs-xpcs.h>
11#include <linux/mdio.h>
12#include <linux/phylink.h>
13#include <linux/workqueue.h>
14#include "pcs-xpcs.h"
15
16#define phylink_pcs_to_xpcs(pl_pcs) \
17 container_of((pl_pcs), struct dw_xpcs, pcs)
18
19static const int xpcs_usxgmii_features[] = {
20 ETHTOOL_LINK_MODE_Pause_BIT,
21 ETHTOOL_LINK_MODE_Asym_Pause_BIT,
22 ETHTOOL_LINK_MODE_Autoneg_BIT,
23 ETHTOOL_LINK_MODE_1000baseKX_Full_BIT,
24 ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT,
25 ETHTOOL_LINK_MODE_10000baseKR_Full_BIT,
26 ETHTOOL_LINK_MODE_2500baseX_Full_BIT,
27 __ETHTOOL_LINK_MODE_MASK_NBITS,
28};
29
30static const int xpcs_10gkr_features[] = {
31 ETHTOOL_LINK_MODE_Pause_BIT,
32 ETHTOOL_LINK_MODE_Asym_Pause_BIT,
33 ETHTOOL_LINK_MODE_10000baseKR_Full_BIT,
34 __ETHTOOL_LINK_MODE_MASK_NBITS,
35};
36
37static const int xpcs_xlgmii_features[] = {
38 ETHTOOL_LINK_MODE_Pause_BIT,
39 ETHTOOL_LINK_MODE_Asym_Pause_BIT,
40 ETHTOOL_LINK_MODE_25000baseCR_Full_BIT,
41 ETHTOOL_LINK_MODE_25000baseKR_Full_BIT,
42 ETHTOOL_LINK_MODE_25000baseSR_Full_BIT,
43 ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT,
44 ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT,
45 ETHTOOL_LINK_MODE_40000baseSR4_Full_BIT,
46 ETHTOOL_LINK_MODE_40000baseLR4_Full_BIT,
47 ETHTOOL_LINK_MODE_50000baseCR2_Full_BIT,
48 ETHTOOL_LINK_MODE_50000baseKR2_Full_BIT,
49 ETHTOOL_LINK_MODE_50000baseSR2_Full_BIT,
50 ETHTOOL_LINK_MODE_50000baseKR_Full_BIT,
51 ETHTOOL_LINK_MODE_50000baseSR_Full_BIT,
52 ETHTOOL_LINK_MODE_50000baseCR_Full_BIT,
53 ETHTOOL_LINK_MODE_50000baseLR_ER_FR_Full_BIT,
54 ETHTOOL_LINK_MODE_50000baseDR_Full_BIT,
55 ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT,
56 ETHTOOL_LINK_MODE_100000baseSR4_Full_BIT,
57 ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT,
58 ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT,
59 ETHTOOL_LINK_MODE_100000baseKR2_Full_BIT,
60 ETHTOOL_LINK_MODE_100000baseSR2_Full_BIT,
61 ETHTOOL_LINK_MODE_100000baseCR2_Full_BIT,
62 ETHTOOL_LINK_MODE_100000baseLR2_ER2_FR2_Full_BIT,
63 ETHTOOL_LINK_MODE_100000baseDR2_Full_BIT,
64 __ETHTOOL_LINK_MODE_MASK_NBITS,
65};
66
67static const int xpcs_sgmii_features[] = {
68 ETHTOOL_LINK_MODE_Pause_BIT,
69 ETHTOOL_LINK_MODE_Asym_Pause_BIT,
70 ETHTOOL_LINK_MODE_Autoneg_BIT,
71 ETHTOOL_LINK_MODE_10baseT_Half_BIT,
72 ETHTOOL_LINK_MODE_10baseT_Full_BIT,
73 ETHTOOL_LINK_MODE_100baseT_Half_BIT,
74 ETHTOOL_LINK_MODE_100baseT_Full_BIT,
75 ETHTOOL_LINK_MODE_1000baseT_Half_BIT,
76 ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
77 __ETHTOOL_LINK_MODE_MASK_NBITS,
78};
79
80static const int xpcs_1000basex_features[] = {
81 ETHTOOL_LINK_MODE_Pause_BIT,
82 ETHTOOL_LINK_MODE_Asym_Pause_BIT,
83 ETHTOOL_LINK_MODE_Autoneg_BIT,
84 ETHTOOL_LINK_MODE_1000baseX_Full_BIT,
85 __ETHTOOL_LINK_MODE_MASK_NBITS,
86};
87
88static const int xpcs_2500basex_features[] = {
89 ETHTOOL_LINK_MODE_Pause_BIT,
90 ETHTOOL_LINK_MODE_Asym_Pause_BIT,
91 ETHTOOL_LINK_MODE_Autoneg_BIT,
92 ETHTOOL_LINK_MODE_2500baseX_Full_BIT,
93 ETHTOOL_LINK_MODE_2500baseT_Full_BIT,
94 __ETHTOOL_LINK_MODE_MASK_NBITS,
95};
96
97static const phy_interface_t xpcs_usxgmii_interfaces[] = {
98 PHY_INTERFACE_MODE_USXGMII,
99};
100
101static const phy_interface_t xpcs_10gkr_interfaces[] = {
102 PHY_INTERFACE_MODE_10GKR,
103};
104
105static const phy_interface_t xpcs_xlgmii_interfaces[] = {
106 PHY_INTERFACE_MODE_XLGMII,
107};
108
109static const phy_interface_t xpcs_sgmii_interfaces[] = {
110 PHY_INTERFACE_MODE_SGMII,
111};
112
113static const phy_interface_t xpcs_1000basex_interfaces[] = {
114 PHY_INTERFACE_MODE_1000BASEX,
115};
116
117static const phy_interface_t xpcs_2500basex_interfaces[] = {
118 PHY_INTERFACE_MODE_2500BASEX,
119 PHY_INTERFACE_MODE_MAX,
120};
121
122enum {
123 DW_XPCS_USXGMII,
124 DW_XPCS_10GKR,
125 DW_XPCS_XLGMII,
126 DW_XPCS_SGMII,
127 DW_XPCS_1000BASEX,
128 DW_XPCS_2500BASEX,
129 DW_XPCS_INTERFACE_MAX,
130};
131
132struct xpcs_compat {
133 const int *supported;
134 const phy_interface_t *interface;
135 int num_interfaces;
136 int an_mode;
137 int (*pma_config)(struct dw_xpcs *xpcs);
138};
139
140struct xpcs_id {
141 u32 id;
142 u32 mask;
143 const struct xpcs_compat *compat;
144};
145
146static const struct xpcs_compat *xpcs_find_compat(const struct xpcs_id *id,
147 phy_interface_t interface)
148{
149 int i, j;
150
151 for (i = 0; i < DW_XPCS_INTERFACE_MAX; i++) {
152 const struct xpcs_compat *compat = &id->compat[i];
153
154 for (j = 0; j < compat->num_interfaces; j++)
155 if (compat->interface[j] == interface)
156 return compat;
157 }
158
159 return NULL;
160}
161
162int xpcs_get_an_mode(struct dw_xpcs *xpcs, phy_interface_t interface)
163{
164 const struct xpcs_compat *compat;
165
166 compat = xpcs_find_compat(xpcs->id, interface);
167 if (!compat)
168 return -ENODEV;
169
170 return compat->an_mode;
171}
172EXPORT_SYMBOL_GPL(xpcs_get_an_mode);
173
174static bool __xpcs_linkmode_supported(const struct xpcs_compat *compat,
175 enum ethtool_link_mode_bit_indices linkmode)
176{
177 int i;
178
179 for (i = 0; compat->supported[i] != __ETHTOOL_LINK_MODE_MASK_NBITS; i++)
180 if (compat->supported[i] == linkmode)
181 return true;
182
183 return false;
184}
185
186#define xpcs_linkmode_supported(compat, mode) \
187 __xpcs_linkmode_supported(compat, ETHTOOL_LINK_MODE_ ## mode ## _BIT)
188
189int xpcs_read(struct dw_xpcs *xpcs, int dev, u32 reg)
190{
191 return mdiodev_c45_read(xpcs->mdiodev, dev, reg);
192}
193
194int xpcs_write(struct dw_xpcs *xpcs, int dev, u32 reg, u16 val)
195{
196 return mdiodev_c45_write(xpcs->mdiodev, dev, reg, val);
197}
198
199static int xpcs_modify_changed(struct dw_xpcs *xpcs, int dev, u32 reg,
200 u16 mask, u16 set)
201{
202 u32 reg_addr = mdiobus_c45_addr(dev, reg);
203
204 return mdiodev_modify_changed(xpcs->mdiodev, reg_addr, mask, set);
205}
206
207static int xpcs_read_vendor(struct dw_xpcs *xpcs, int dev, u32 reg)
208{
209 return xpcs_read(xpcs, dev, DW_VENDOR | reg);
210}
211
212static int xpcs_write_vendor(struct dw_xpcs *xpcs, int dev, int reg,
213 u16 val)
214{
215 return xpcs_write(xpcs, dev, DW_VENDOR | reg, val);
216}
217
218static int xpcs_read_vpcs(struct dw_xpcs *xpcs, int reg)
219{
220 return xpcs_read_vendor(xpcs, MDIO_MMD_PCS, reg);
221}
222
223static int xpcs_write_vpcs(struct dw_xpcs *xpcs, int reg, u16 val)
224{
225 return xpcs_write_vendor(xpcs, MDIO_MMD_PCS, reg, val);
226}
227
228static int xpcs_poll_reset(struct dw_xpcs *xpcs, int dev)
229{
230 /* Poll until the reset bit clears (50ms per retry == 0.6 sec) */
231 unsigned int retries = 12;
232 int ret;
233
234 do {
235 msleep(50);
236 ret = xpcs_read(xpcs, dev, MDIO_CTRL1);
237 if (ret < 0)
238 return ret;
239 } while (ret & MDIO_CTRL1_RESET && --retries);
240
241 return (ret & MDIO_CTRL1_RESET) ? -ETIMEDOUT : 0;
242}
243
244static int xpcs_soft_reset(struct dw_xpcs *xpcs,
245 const struct xpcs_compat *compat)
246{
247 int ret, dev;
248
249 switch (compat->an_mode) {
250 case DW_AN_C73:
251 dev = MDIO_MMD_PCS;
252 break;
253 case DW_AN_C37_SGMII:
254 case DW_2500BASEX:
255 case DW_AN_C37_1000BASEX:
256 dev = MDIO_MMD_VEND2;
257 break;
258 default:
259 return -1;
260 }
261
262 ret = xpcs_write(xpcs, dev, MDIO_CTRL1, MDIO_CTRL1_RESET);
263 if (ret < 0)
264 return ret;
265
266 return xpcs_poll_reset(xpcs, dev);
267}
268
269#define xpcs_warn(__xpcs, __state, __args...) \
270({ \
271 if ((__state)->link) \
272 dev_warn(&(__xpcs)->mdiodev->dev, ##__args); \
273})
274
275static int xpcs_read_fault_c73(struct dw_xpcs *xpcs,
276 struct phylink_link_state *state)
277{
278 int ret;
279
280 ret = xpcs_read(xpcs, MDIO_MMD_PCS, MDIO_STAT1);
281 if (ret < 0)
282 return ret;
283
284 if (ret & MDIO_STAT1_FAULT) {
285 xpcs_warn(xpcs, state, "Link fault condition detected!\n");
286 return -EFAULT;
287 }
288
289 ret = xpcs_read(xpcs, MDIO_MMD_PCS, MDIO_STAT2);
290 if (ret < 0)
291 return ret;
292
293 if (ret & MDIO_STAT2_RXFAULT)
294 xpcs_warn(xpcs, state, "Receiver fault detected!\n");
295 if (ret & MDIO_STAT2_TXFAULT)
296 xpcs_warn(xpcs, state, "Transmitter fault detected!\n");
297
298 ret = xpcs_read_vendor(xpcs, MDIO_MMD_PCS, DW_VR_XS_PCS_DIG_STS);
299 if (ret < 0)
300 return ret;
301
302 if (ret & DW_RXFIFO_ERR) {
303 xpcs_warn(xpcs, state, "FIFO fault condition detected!\n");
304 return -EFAULT;
305 }
306
307 ret = xpcs_read(xpcs, MDIO_MMD_PCS, MDIO_PCS_10GBRT_STAT1);
308 if (ret < 0)
309 return ret;
310
311 if (!(ret & MDIO_PCS_10GBRT_STAT1_BLKLK))
312 xpcs_warn(xpcs, state, "Link is not locked!\n");
313
314 ret = xpcs_read(xpcs, MDIO_MMD_PCS, MDIO_PCS_10GBRT_STAT2);
315 if (ret < 0)
316 return ret;
317
318 if (ret & MDIO_PCS_10GBRT_STAT2_ERR) {
319 xpcs_warn(xpcs, state, "Link has errors!\n");
320 return -EFAULT;
321 }
322
323 return 0;
324}
325
326static int xpcs_read_link_c73(struct dw_xpcs *xpcs, bool an)
327{
328 bool link = true;
329 int ret;
330
331 ret = xpcs_read(xpcs, MDIO_MMD_PCS, MDIO_STAT1);
332 if (ret < 0)
333 return ret;
334
335 if (!(ret & MDIO_STAT1_LSTATUS))
336 link = false;
337
338 if (an) {
339 ret = xpcs_read(xpcs, MDIO_MMD_AN, MDIO_STAT1);
340 if (ret < 0)
341 return ret;
342
343 if (!(ret & MDIO_STAT1_LSTATUS))
344 link = false;
345 }
346
347 return link;
348}
349
350static int xpcs_get_max_usxgmii_speed(const unsigned long *supported)
351{
352 int max = SPEED_UNKNOWN;
353
354 if (phylink_test(supported, 1000baseKX_Full))
355 max = SPEED_1000;
356 if (phylink_test(supported, 2500baseX_Full))
357 max = SPEED_2500;
358 if (phylink_test(supported, 10000baseKX4_Full))
359 max = SPEED_10000;
360 if (phylink_test(supported, 10000baseKR_Full))
361 max = SPEED_10000;
362
363 return max;
364}
365
366static void xpcs_config_usxgmii(struct dw_xpcs *xpcs, int speed)
367{
368 int ret, speed_sel;
369
370 switch (speed) {
371 case SPEED_10:
372 speed_sel = DW_USXGMII_10;
373 break;
374 case SPEED_100:
375 speed_sel = DW_USXGMII_100;
376 break;
377 case SPEED_1000:
378 speed_sel = DW_USXGMII_1000;
379 break;
380 case SPEED_2500:
381 speed_sel = DW_USXGMII_2500;
382 break;
383 case SPEED_5000:
384 speed_sel = DW_USXGMII_5000;
385 break;
386 case SPEED_10000:
387 speed_sel = DW_USXGMII_10000;
388 break;
389 default:
390 /* Nothing to do here */
391 return;
392 }
393
394 ret = xpcs_read_vpcs(xpcs, MDIO_CTRL1);
395 if (ret < 0)
396 goto out;
397
398 ret = xpcs_write_vpcs(xpcs, MDIO_CTRL1, ret | DW_USXGMII_EN);
399 if (ret < 0)
400 goto out;
401
402 ret = xpcs_read(xpcs, MDIO_MMD_VEND2, MDIO_CTRL1);
403 if (ret < 0)
404 goto out;
405
406 ret &= ~DW_USXGMII_SS_MASK;
407 ret |= speed_sel | DW_USXGMII_FULL;
408
409 ret = xpcs_write(xpcs, MDIO_MMD_VEND2, MDIO_CTRL1, ret);
410 if (ret < 0)
411 goto out;
412
413 ret = xpcs_read_vpcs(xpcs, MDIO_CTRL1);
414 if (ret < 0)
415 goto out;
416
417 ret = xpcs_write_vpcs(xpcs, MDIO_CTRL1, ret | DW_USXGMII_RST);
418 if (ret < 0)
419 goto out;
420
421 return;
422
423out:
424 pr_err("%s: XPCS access returned %pe\n", __func__, ERR_PTR(ret));
425}
426
427static int _xpcs_config_aneg_c73(struct dw_xpcs *xpcs,
428 const struct xpcs_compat *compat)
429{
430 int ret, adv;
431
432 /* By default, in USXGMII mode XPCS operates at 10G baud and
433 * replicates data to achieve lower speeds. Hereby, in this
434 * default configuration we need to advertise all supported
435 * modes and not only the ones we want to use.
436 */
437
438 /* SR_AN_ADV3 */
439 adv = 0;
440 if (xpcs_linkmode_supported(compat, 2500baseX_Full))
441 adv |= DW_C73_2500KX;
442
443 /* TODO: 5000baseKR */
444
445 ret = xpcs_write(xpcs, MDIO_MMD_AN, DW_SR_AN_ADV3, adv);
446 if (ret < 0)
447 return ret;
448
449 /* SR_AN_ADV2 */
450 adv = 0;
451 if (xpcs_linkmode_supported(compat, 1000baseKX_Full))
452 adv |= DW_C73_1000KX;
453 if (xpcs_linkmode_supported(compat, 10000baseKX4_Full))
454 adv |= DW_C73_10000KX4;
455 if (xpcs_linkmode_supported(compat, 10000baseKR_Full))
456 adv |= DW_C73_10000KR;
457
458 ret = xpcs_write(xpcs, MDIO_MMD_AN, DW_SR_AN_ADV2, adv);
459 if (ret < 0)
460 return ret;
461
462 /* SR_AN_ADV1 */
463 adv = DW_C73_AN_ADV_SF;
464 if (xpcs_linkmode_supported(compat, Pause))
465 adv |= DW_C73_PAUSE;
466 if (xpcs_linkmode_supported(compat, Asym_Pause))
467 adv |= DW_C73_ASYM_PAUSE;
468
469 return xpcs_write(xpcs, MDIO_MMD_AN, DW_SR_AN_ADV1, adv);
470}
471
472static int xpcs_config_aneg_c73(struct dw_xpcs *xpcs,
473 const struct xpcs_compat *compat)
474{
475 int ret;
476
477 ret = _xpcs_config_aneg_c73(xpcs, compat);
478 if (ret < 0)
479 return ret;
480
481 ret = xpcs_read(xpcs, MDIO_MMD_AN, MDIO_CTRL1);
482 if (ret < 0)
483 return ret;
484
485 ret |= MDIO_AN_CTRL1_ENABLE | MDIO_AN_CTRL1_RESTART;
486
487 return xpcs_write(xpcs, MDIO_MMD_AN, MDIO_CTRL1, ret);
488}
489
490static int xpcs_aneg_done_c73(struct dw_xpcs *xpcs,
491 struct phylink_link_state *state,
492 const struct xpcs_compat *compat)
493{
494 int ret;
495
496 ret = xpcs_read(xpcs, MDIO_MMD_AN, MDIO_STAT1);
497 if (ret < 0)
498 return ret;
499
500 if (ret & MDIO_AN_STAT1_COMPLETE) {
501 ret = xpcs_read(xpcs, MDIO_MMD_AN, DW_SR_AN_LP_ABL1);
502 if (ret < 0)
503 return ret;
504
505 /* Check if Aneg outcome is valid */
506 if (!(ret & DW_C73_AN_ADV_SF)) {
507 xpcs_config_aneg_c73(xpcs, compat);
508 return 0;
509 }
510
511 return 1;
512 }
513
514 return 0;
515}
516
517static int xpcs_read_lpa_c73(struct dw_xpcs *xpcs,
518 struct phylink_link_state *state)
519{
520 int ret;
521
522 ret = xpcs_read(xpcs, MDIO_MMD_AN, MDIO_STAT1);
523 if (ret < 0)
524 return ret;
525
526 if (!(ret & MDIO_AN_STAT1_LPABLE)) {
527 phylink_clear(state->lp_advertising, Autoneg);
528 return 0;
529 }
530
531 phylink_set(state->lp_advertising, Autoneg);
532
533 /* Clause 73 outcome */
534 ret = xpcs_read(xpcs, MDIO_MMD_AN, DW_SR_AN_LP_ABL3);
535 if (ret < 0)
536 return ret;
537
538 if (ret & DW_C73_2500KX)
539 phylink_set(state->lp_advertising, 2500baseX_Full);
540
541 ret = xpcs_read(xpcs, MDIO_MMD_AN, DW_SR_AN_LP_ABL2);
542 if (ret < 0)
543 return ret;
544
545 if (ret & DW_C73_1000KX)
546 phylink_set(state->lp_advertising, 1000baseKX_Full);
547 if (ret & DW_C73_10000KX4)
548 phylink_set(state->lp_advertising, 10000baseKX4_Full);
549 if (ret & DW_C73_10000KR)
550 phylink_set(state->lp_advertising, 10000baseKR_Full);
551
552 ret = xpcs_read(xpcs, MDIO_MMD_AN, DW_SR_AN_LP_ABL1);
553 if (ret < 0)
554 return ret;
555
556 if (ret & DW_C73_PAUSE)
557 phylink_set(state->lp_advertising, Pause);
558 if (ret & DW_C73_ASYM_PAUSE)
559 phylink_set(state->lp_advertising, Asym_Pause);
560
561 linkmode_and(state->lp_advertising, state->lp_advertising,
562 state->advertising);
563 return 0;
564}
565
566static void xpcs_resolve_lpa_c73(struct dw_xpcs *xpcs,
567 struct phylink_link_state *state)
568{
569 int max_speed = xpcs_get_max_usxgmii_speed(state->lp_advertising);
570
571 state->pause = MLO_PAUSE_TX | MLO_PAUSE_RX;
572 state->speed = max_speed;
573 state->duplex = DUPLEX_FULL;
574}
575
576static int xpcs_get_max_xlgmii_speed(struct dw_xpcs *xpcs,
577 struct phylink_link_state *state)
578{
579 unsigned long *adv = state->advertising;
580 int speed = SPEED_UNKNOWN;
581 int bit;
582
583 for_each_set_bit(bit, adv, __ETHTOOL_LINK_MODE_MASK_NBITS) {
584 int new_speed = SPEED_UNKNOWN;
585
586 switch (bit) {
587 case ETHTOOL_LINK_MODE_25000baseCR_Full_BIT:
588 case ETHTOOL_LINK_MODE_25000baseKR_Full_BIT:
589 case ETHTOOL_LINK_MODE_25000baseSR_Full_BIT:
590 new_speed = SPEED_25000;
591 break;
592 case ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT:
593 case ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT:
594 case ETHTOOL_LINK_MODE_40000baseSR4_Full_BIT:
595 case ETHTOOL_LINK_MODE_40000baseLR4_Full_BIT:
596 new_speed = SPEED_40000;
597 break;
598 case ETHTOOL_LINK_MODE_50000baseCR2_Full_BIT:
599 case ETHTOOL_LINK_MODE_50000baseKR2_Full_BIT:
600 case ETHTOOL_LINK_MODE_50000baseSR2_Full_BIT:
601 case ETHTOOL_LINK_MODE_50000baseKR_Full_BIT:
602 case ETHTOOL_LINK_MODE_50000baseSR_Full_BIT:
603 case ETHTOOL_LINK_MODE_50000baseCR_Full_BIT:
604 case ETHTOOL_LINK_MODE_50000baseLR_ER_FR_Full_BIT:
605 case ETHTOOL_LINK_MODE_50000baseDR_Full_BIT:
606 new_speed = SPEED_50000;
607 break;
608 case ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT:
609 case ETHTOOL_LINK_MODE_100000baseSR4_Full_BIT:
610 case ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT:
611 case ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT:
612 case ETHTOOL_LINK_MODE_100000baseKR2_Full_BIT:
613 case ETHTOOL_LINK_MODE_100000baseSR2_Full_BIT:
614 case ETHTOOL_LINK_MODE_100000baseCR2_Full_BIT:
615 case ETHTOOL_LINK_MODE_100000baseLR2_ER2_FR2_Full_BIT:
616 case ETHTOOL_LINK_MODE_100000baseDR2_Full_BIT:
617 new_speed = SPEED_100000;
618 break;
619 default:
620 continue;
621 }
622
623 if (new_speed > speed)
624 speed = new_speed;
625 }
626
627 return speed;
628}
629
630static void xpcs_resolve_pma(struct dw_xpcs *xpcs,
631 struct phylink_link_state *state)
632{
633 state->pause = MLO_PAUSE_TX | MLO_PAUSE_RX;
634 state->duplex = DUPLEX_FULL;
635
636 switch (state->interface) {
637 case PHY_INTERFACE_MODE_10GKR:
638 state->speed = SPEED_10000;
639 break;
640 case PHY_INTERFACE_MODE_XLGMII:
641 state->speed = xpcs_get_max_xlgmii_speed(xpcs, state);
642 break;
643 default:
644 state->speed = SPEED_UNKNOWN;
645 break;
646 }
647}
648
649static int xpcs_validate(struct phylink_pcs *pcs, unsigned long *supported,
650 const struct phylink_link_state *state)
651{
652 __ETHTOOL_DECLARE_LINK_MODE_MASK(xpcs_supported) = { 0, };
653 const struct xpcs_compat *compat;
654 struct dw_xpcs *xpcs;
655 int i;
656
657 xpcs = phylink_pcs_to_xpcs(pcs);
658 compat = xpcs_find_compat(xpcs->id, state->interface);
659
660 /* Populate the supported link modes for this PHY interface type.
661 * FIXME: what about the port modes and autoneg bit? This masks
662 * all those away.
663 */
664 if (compat)
665 for (i = 0; compat->supported[i] != __ETHTOOL_LINK_MODE_MASK_NBITS; i++)
666 set_bit(compat->supported[i], xpcs_supported);
667
668 linkmode_and(supported, supported, xpcs_supported);
669
670 return 0;
671}
672
673void xpcs_get_interfaces(struct dw_xpcs *xpcs, unsigned long *interfaces)
674{
675 int i, j;
676
677 for (i = 0; i < DW_XPCS_INTERFACE_MAX; i++) {
678 const struct xpcs_compat *compat = &xpcs->id->compat[i];
679
680 for (j = 0; j < compat->num_interfaces; j++)
681 if (compat->interface[j] < PHY_INTERFACE_MODE_MAX)
682 __set_bit(compat->interface[j], interfaces);
683 }
684}
685EXPORT_SYMBOL_GPL(xpcs_get_interfaces);
686
687int xpcs_config_eee(struct dw_xpcs *xpcs, int mult_fact_100ns, int enable)
688{
689 int ret;
690
691 ret = xpcs_read(xpcs, MDIO_MMD_VEND2, DW_VR_MII_EEE_MCTRL0);
692 if (ret < 0)
693 return ret;
694
695 if (enable) {
696 /* Enable EEE */
697 ret = DW_VR_MII_EEE_LTX_EN | DW_VR_MII_EEE_LRX_EN |
698 DW_VR_MII_EEE_TX_QUIET_EN | DW_VR_MII_EEE_RX_QUIET_EN |
699 DW_VR_MII_EEE_TX_EN_CTRL | DW_VR_MII_EEE_RX_EN_CTRL |
700 mult_fact_100ns << DW_VR_MII_EEE_MULT_FACT_100NS_SHIFT;
701 } else {
702 ret &= ~(DW_VR_MII_EEE_LTX_EN | DW_VR_MII_EEE_LRX_EN |
703 DW_VR_MII_EEE_TX_QUIET_EN | DW_VR_MII_EEE_RX_QUIET_EN |
704 DW_VR_MII_EEE_TX_EN_CTRL | DW_VR_MII_EEE_RX_EN_CTRL |
705 DW_VR_MII_EEE_MULT_FACT_100NS);
706 }
707
708 ret = xpcs_write(xpcs, MDIO_MMD_VEND2, DW_VR_MII_EEE_MCTRL0, ret);
709 if (ret < 0)
710 return ret;
711
712 ret = xpcs_read(xpcs, MDIO_MMD_VEND2, DW_VR_MII_EEE_MCTRL1);
713 if (ret < 0)
714 return ret;
715
716 if (enable)
717 ret |= DW_VR_MII_EEE_TRN_LPI;
718 else
719 ret &= ~DW_VR_MII_EEE_TRN_LPI;
720
721 return xpcs_write(xpcs, MDIO_MMD_VEND2, DW_VR_MII_EEE_MCTRL1, ret);
722}
723EXPORT_SYMBOL_GPL(xpcs_config_eee);
724
725static int xpcs_config_aneg_c37_sgmii(struct dw_xpcs *xpcs, unsigned int mode)
726{
727 int ret, mdio_ctrl;
728
729 /* For AN for C37 SGMII mode, the settings are :-
730 * 1) VR_MII_MMD_CTRL Bit(12) [AN_ENABLE] = 0b (Disable SGMII AN in case
731 it is already enabled)
732 * 2) VR_MII_AN_CTRL Bit(2:1)[PCS_MODE] = 10b (SGMII AN)
733 * 3) VR_MII_AN_CTRL Bit(3) [TX_CONFIG] = 0b (MAC side SGMII)
734 * DW xPCS used with DW EQoS MAC is always MAC side SGMII.
735 * 4) VR_MII_DIG_CTRL1 Bit(9) [MAC_AUTO_SW] = 1b (Automatic
736 * speed/duplex mode change by HW after SGMII AN complete)
737 * 5) VR_MII_MMD_CTRL Bit(12) [AN_ENABLE] = 1b (Enable SGMII AN)
738 *
739 * Note: Since it is MAC side SGMII, there is no need to set
740 * SR_MII_AN_ADV. MAC side SGMII receives AN Tx Config from
741 * PHY about the link state change after C28 AN is completed
742 * between PHY and Link Partner. There is also no need to
743 * trigger AN restart for MAC-side SGMII.
744 */
745 mdio_ctrl = xpcs_read(xpcs, MDIO_MMD_VEND2, DW_VR_MII_MMD_CTRL);
746 if (mdio_ctrl < 0)
747 return mdio_ctrl;
748
749 if (mdio_ctrl & AN_CL37_EN) {
750 ret = xpcs_write(xpcs, MDIO_MMD_VEND2, DW_VR_MII_MMD_CTRL,
751 mdio_ctrl & ~AN_CL37_EN);
752 if (ret < 0)
753 return ret;
754 }
755
756 ret = xpcs_read(xpcs, MDIO_MMD_VEND2, DW_VR_MII_AN_CTRL);
757 if (ret < 0)
758 return ret;
759
760 ret &= ~(DW_VR_MII_PCS_MODE_MASK | DW_VR_MII_TX_CONFIG_MASK);
761 ret |= (DW_VR_MII_PCS_MODE_C37_SGMII <<
762 DW_VR_MII_AN_CTRL_PCS_MODE_SHIFT &
763 DW_VR_MII_PCS_MODE_MASK);
764 ret |= (DW_VR_MII_TX_CONFIG_MAC_SIDE_SGMII <<
765 DW_VR_MII_AN_CTRL_TX_CONFIG_SHIFT &
766 DW_VR_MII_TX_CONFIG_MASK);
767 ret = xpcs_write(xpcs, MDIO_MMD_VEND2, DW_VR_MII_AN_CTRL, ret);
768 if (ret < 0)
769 return ret;
770
771 ret = xpcs_read(xpcs, MDIO_MMD_VEND2, DW_VR_MII_DIG_CTRL1);
772 if (ret < 0)
773 return ret;
774
775 if (phylink_autoneg_inband(mode))
776 ret |= DW_VR_MII_DIG_CTRL1_MAC_AUTO_SW;
777 else
778 ret &= ~DW_VR_MII_DIG_CTRL1_MAC_AUTO_SW;
779
780 ret = xpcs_write(xpcs, MDIO_MMD_VEND2, DW_VR_MII_DIG_CTRL1, ret);
781 if (ret < 0)
782 return ret;
783
784 if (phylink_autoneg_inband(mode))
785 ret = xpcs_write(xpcs, MDIO_MMD_VEND2, DW_VR_MII_MMD_CTRL,
786 mdio_ctrl | AN_CL37_EN);
787
788 return ret;
789}
790
791static int xpcs_config_aneg_c37_1000basex(struct dw_xpcs *xpcs, unsigned int mode,
792 const unsigned long *advertising)
793{
794 phy_interface_t interface = PHY_INTERFACE_MODE_1000BASEX;
795 int ret, mdio_ctrl, adv;
796 bool changed = 0;
797
798 /* According to Chap 7.12, to set 1000BASE-X C37 AN, AN must
799 * be disabled first:-
800 * 1) VR_MII_MMD_CTRL Bit(12)[AN_ENABLE] = 0b
801 * 2) VR_MII_AN_CTRL Bit(2:1)[PCS_MODE] = 00b (1000BASE-X C37)
802 */
803 mdio_ctrl = xpcs_read(xpcs, MDIO_MMD_VEND2, DW_VR_MII_MMD_CTRL);
804 if (mdio_ctrl < 0)
805 return mdio_ctrl;
806
807 if (mdio_ctrl & AN_CL37_EN) {
808 ret = xpcs_write(xpcs, MDIO_MMD_VEND2, DW_VR_MII_MMD_CTRL,
809 mdio_ctrl & ~AN_CL37_EN);
810 if (ret < 0)
811 return ret;
812 }
813
814 ret = xpcs_read(xpcs, MDIO_MMD_VEND2, DW_VR_MII_AN_CTRL);
815 if (ret < 0)
816 return ret;
817
818 ret &= ~DW_VR_MII_PCS_MODE_MASK;
819 ret = xpcs_write(xpcs, MDIO_MMD_VEND2, DW_VR_MII_AN_CTRL, ret);
820 if (ret < 0)
821 return ret;
822
823 /* Check for advertising changes and update the C45 MII ADV
824 * register accordingly.
825 */
826 adv = phylink_mii_c22_pcs_encode_advertisement(interface,
827 advertising);
828 if (adv >= 0) {
829 ret = xpcs_modify_changed(xpcs, MDIO_MMD_VEND2,
830 MII_ADVERTISE, 0xffff, adv);
831 if (ret < 0)
832 return ret;
833
834 changed = ret;
835 }
836
837 /* Clear CL37 AN complete status */
838 ret = xpcs_write(xpcs, MDIO_MMD_VEND2, DW_VR_MII_AN_INTR_STS, 0);
839 if (ret < 0)
840 return ret;
841
842 if (phylink_autoneg_inband(mode) &&
843 linkmode_test_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, advertising)) {
844 ret = xpcs_write(xpcs, MDIO_MMD_VEND2, DW_VR_MII_MMD_CTRL,
845 mdio_ctrl | AN_CL37_EN);
846 if (ret < 0)
847 return ret;
848 }
849
850 return changed;
851}
852
853static int xpcs_config_2500basex(struct dw_xpcs *xpcs)
854{
855 int ret;
856
857 ret = xpcs_read(xpcs, MDIO_MMD_VEND2, DW_VR_MII_DIG_CTRL1);
858 if (ret < 0)
859 return ret;
860 ret |= DW_VR_MII_DIG_CTRL1_2G5_EN;
861 ret &= ~DW_VR_MII_DIG_CTRL1_MAC_AUTO_SW;
862 ret = xpcs_write(xpcs, MDIO_MMD_VEND2, DW_VR_MII_DIG_CTRL1, ret);
863 if (ret < 0)
864 return ret;
865
866 ret = xpcs_read(xpcs, MDIO_MMD_VEND2, DW_VR_MII_MMD_CTRL);
867 if (ret < 0)
868 return ret;
869 ret &= ~AN_CL37_EN;
870 ret |= SGMII_SPEED_SS6;
871 ret &= ~SGMII_SPEED_SS13;
872 return xpcs_write(xpcs, MDIO_MMD_VEND2, DW_VR_MII_MMD_CTRL, ret);
873}
874
875int xpcs_do_config(struct dw_xpcs *xpcs, phy_interface_t interface,
876 unsigned int mode, const unsigned long *advertising)
877{
878 const struct xpcs_compat *compat;
879 int ret;
880
881 compat = xpcs_find_compat(xpcs->id, interface);
882 if (!compat)
883 return -ENODEV;
884
885 switch (compat->an_mode) {
886 case DW_AN_C73:
887 if (phylink_autoneg_inband(mode)) {
888 ret = xpcs_config_aneg_c73(xpcs, compat);
889 if (ret)
890 return ret;
891 }
892 break;
893 case DW_AN_C37_SGMII:
894 ret = xpcs_config_aneg_c37_sgmii(xpcs, mode);
895 if (ret)
896 return ret;
897 break;
898 case DW_AN_C37_1000BASEX:
899 ret = xpcs_config_aneg_c37_1000basex(xpcs, mode,
900 advertising);
901 if (ret)
902 return ret;
903 break;
904 case DW_2500BASEX:
905 ret = xpcs_config_2500basex(xpcs);
906 if (ret)
907 return ret;
908 break;
909 default:
910 return -1;
911 }
912
913 if (compat->pma_config) {
914 ret = compat->pma_config(xpcs);
915 if (ret)
916 return ret;
917 }
918
919 return 0;
920}
921EXPORT_SYMBOL_GPL(xpcs_do_config);
922
923static int xpcs_config(struct phylink_pcs *pcs, unsigned int mode,
924 phy_interface_t interface,
925 const unsigned long *advertising,
926 bool permit_pause_to_mac)
927{
928 struct dw_xpcs *xpcs = phylink_pcs_to_xpcs(pcs);
929
930 return xpcs_do_config(xpcs, interface, mode, advertising);
931}
932
933static int xpcs_get_state_c73(struct dw_xpcs *xpcs,
934 struct phylink_link_state *state,
935 const struct xpcs_compat *compat)
936{
937 int ret;
938
939 /* Link needs to be read first ... */
940 state->link = xpcs_read_link_c73(xpcs, state->an_enabled) > 0 ? 1 : 0;
941
942 /* ... and then we check the faults. */
943 ret = xpcs_read_fault_c73(xpcs, state);
944 if (ret) {
945 ret = xpcs_soft_reset(xpcs, compat);
946 if (ret)
947 return ret;
948
949 state->link = 0;
950
951 return xpcs_do_config(xpcs, state->interface, MLO_AN_INBAND, NULL);
952 }
953
954 if (state->an_enabled && xpcs_aneg_done_c73(xpcs, state, compat)) {
955 state->an_complete = true;
956 xpcs_read_lpa_c73(xpcs, state);
957 xpcs_resolve_lpa_c73(xpcs, state);
958 } else if (state->an_enabled) {
959 state->link = 0;
960 } else if (state->link) {
961 xpcs_resolve_pma(xpcs, state);
962 }
963
964 return 0;
965}
966
967static int xpcs_get_state_c37_sgmii(struct dw_xpcs *xpcs,
968 struct phylink_link_state *state)
969{
970 int ret;
971
972 /* Reset link_state */
973 state->link = false;
974 state->speed = SPEED_UNKNOWN;
975 state->duplex = DUPLEX_UNKNOWN;
976 state->pause = 0;
977
978 /* For C37 SGMII mode, we check DW_VR_MII_AN_INTR_STS for link
979 * status, speed and duplex.
980 */
981 ret = xpcs_read(xpcs, MDIO_MMD_VEND2, DW_VR_MII_AN_INTR_STS);
982 if (ret < 0)
983 return ret;
984
985 if (ret & DW_VR_MII_C37_ANSGM_SP_LNKSTS) {
986 int speed_value;
987
988 state->link = true;
989
990 speed_value = (ret & DW_VR_MII_AN_STS_C37_ANSGM_SP) >>
991 DW_VR_MII_AN_STS_C37_ANSGM_SP_SHIFT;
992 if (speed_value == DW_VR_MII_C37_ANSGM_SP_1000)
993 state->speed = SPEED_1000;
994 else if (speed_value == DW_VR_MII_C37_ANSGM_SP_100)
995 state->speed = SPEED_100;
996 else
997 state->speed = SPEED_10;
998
999 if (ret & DW_VR_MII_AN_STS_C37_ANSGM_FD)
1000 state->duplex = DUPLEX_FULL;
1001 else
1002 state->duplex = DUPLEX_HALF;
1003 }
1004
1005 return 0;
1006}
1007
1008static int xpcs_get_state_c37_1000basex(struct dw_xpcs *xpcs,
1009 struct phylink_link_state *state)
1010{
1011 int lpa, bmsr;
1012
1013 if (state->an_enabled) {
1014 /* Reset link state */
1015 state->link = false;
1016
1017 lpa = xpcs_read(xpcs, MDIO_MMD_VEND2, MII_LPA);
1018 if (lpa < 0 || lpa & LPA_RFAULT)
1019 return lpa;
1020
1021 bmsr = xpcs_read(xpcs, MDIO_MMD_VEND2, MII_BMSR);
1022 if (bmsr < 0)
1023 return bmsr;
1024
1025 phylink_mii_c22_pcs_decode_state(state, bmsr, lpa);
1026 }
1027
1028 return 0;
1029}
1030
1031static void xpcs_get_state(struct phylink_pcs *pcs,
1032 struct phylink_link_state *state)
1033{
1034 struct dw_xpcs *xpcs = phylink_pcs_to_xpcs(pcs);
1035 const struct xpcs_compat *compat;
1036 int ret;
1037
1038 compat = xpcs_find_compat(xpcs->id, state->interface);
1039 if (!compat)
1040 return;
1041
1042 switch (compat->an_mode) {
1043 case DW_AN_C73:
1044 ret = xpcs_get_state_c73(xpcs, state, compat);
1045 if (ret) {
1046 pr_err("xpcs_get_state_c73 returned %pe\n",
1047 ERR_PTR(ret));
1048 return;
1049 }
1050 break;
1051 case DW_AN_C37_SGMII:
1052 ret = xpcs_get_state_c37_sgmii(xpcs, state);
1053 if (ret) {
1054 pr_err("xpcs_get_state_c37_sgmii returned %pe\n",
1055 ERR_PTR(ret));
1056 }
1057 break;
1058 case DW_AN_C37_1000BASEX:
1059 ret = xpcs_get_state_c37_1000basex(xpcs, state);
1060 if (ret) {
1061 pr_err("xpcs_get_state_c37_1000basex returned %pe\n",
1062 ERR_PTR(ret));
1063 }
1064 break;
1065 default:
1066 return;
1067 }
1068}
1069
1070static void xpcs_link_up_sgmii(struct dw_xpcs *xpcs, unsigned int mode,
1071 int speed, int duplex)
1072{
1073 int val, ret;
1074
1075 if (phylink_autoneg_inband(mode))
1076 return;
1077
1078 val = mii_bmcr_encode_fixed(speed, duplex);
1079 ret = xpcs_write(xpcs, MDIO_MMD_VEND2, MDIO_CTRL1, val);
1080 if (ret)
1081 pr_err("%s: xpcs_write returned %pe\n", __func__, ERR_PTR(ret));
1082}
1083
1084static void xpcs_link_up_1000basex(struct dw_xpcs *xpcs, unsigned int mode,
1085 int speed, int duplex)
1086{
1087 int val, ret;
1088
1089 if (phylink_autoneg_inband(mode))
1090 return;
1091
1092 switch (speed) {
1093 case SPEED_1000:
1094 val = BMCR_SPEED1000;
1095 break;
1096 case SPEED_100:
1097 case SPEED_10:
1098 default:
1099 pr_err("%s: speed = %d\n", __func__, speed);
1100 return;
1101 }
1102
1103 if (duplex == DUPLEX_FULL)
1104 val |= BMCR_FULLDPLX;
1105 else
1106 pr_err("%s: half duplex not supported\n", __func__);
1107
1108 ret = xpcs_write(xpcs, MDIO_MMD_VEND2, MDIO_CTRL1, val);
1109 if (ret)
1110 pr_err("%s: xpcs_write returned %pe\n", __func__, ERR_PTR(ret));
1111}
1112
1113void xpcs_link_up(struct phylink_pcs *pcs, unsigned int mode,
1114 phy_interface_t interface, int speed, int duplex)
1115{
1116 struct dw_xpcs *xpcs = phylink_pcs_to_xpcs(pcs);
1117
1118 if (interface == PHY_INTERFACE_MODE_USXGMII)
1119 return xpcs_config_usxgmii(xpcs, speed);
1120 if (interface == PHY_INTERFACE_MODE_SGMII)
1121 return xpcs_link_up_sgmii(xpcs, mode, speed, duplex);
1122 if (interface == PHY_INTERFACE_MODE_1000BASEX)
1123 return xpcs_link_up_1000basex(xpcs, mode, speed, duplex);
1124}
1125EXPORT_SYMBOL_GPL(xpcs_link_up);
1126
1127static void xpcs_an_restart(struct phylink_pcs *pcs)
1128{
1129 struct dw_xpcs *xpcs = phylink_pcs_to_xpcs(pcs);
1130 int ret;
1131
1132 ret = xpcs_read(xpcs, MDIO_MMD_VEND2, MDIO_CTRL1);
1133 if (ret >= 0) {
1134 ret |= BMCR_ANRESTART;
1135 xpcs_write(xpcs, MDIO_MMD_VEND2, MDIO_CTRL1, ret);
1136 }
1137}
1138
1139static u32 xpcs_get_id(struct dw_xpcs *xpcs)
1140{
1141 int ret;
1142 u32 id;
1143
1144 /* First, search C73 PCS using PCS MMD */
1145 ret = xpcs_read(xpcs, MDIO_MMD_PCS, MII_PHYSID1);
1146 if (ret < 0)
1147 return 0xffffffff;
1148
1149 id = ret << 16;
1150
1151 ret = xpcs_read(xpcs, MDIO_MMD_PCS, MII_PHYSID2);
1152 if (ret < 0)
1153 return 0xffffffff;
1154
1155 /* If Device IDs are not all zeros or all ones,
1156 * we found C73 AN-type device
1157 */
1158 if ((id | ret) && (id | ret) != 0xffffffff)
1159 return id | ret;
1160
1161 /* Next, search C37 PCS using Vendor-Specific MII MMD */
1162 ret = xpcs_read(xpcs, MDIO_MMD_VEND2, MII_PHYSID1);
1163 if (ret < 0)
1164 return 0xffffffff;
1165
1166 id = ret << 16;
1167
1168 ret = xpcs_read(xpcs, MDIO_MMD_VEND2, MII_PHYSID2);
1169 if (ret < 0)
1170 return 0xffffffff;
1171
1172 /* If Device IDs are not all zeros, we found C37 AN-type device */
1173 if (id | ret)
1174 return id | ret;
1175
1176 return 0xffffffff;
1177}
1178
1179static const struct xpcs_compat synopsys_xpcs_compat[DW_XPCS_INTERFACE_MAX] = {
1180 [DW_XPCS_USXGMII] = {
1181 .supported = xpcs_usxgmii_features,
1182 .interface = xpcs_usxgmii_interfaces,
1183 .num_interfaces = ARRAY_SIZE(xpcs_usxgmii_interfaces),
1184 .an_mode = DW_AN_C73,
1185 },
1186 [DW_XPCS_10GKR] = {
1187 .supported = xpcs_10gkr_features,
1188 .interface = xpcs_10gkr_interfaces,
1189 .num_interfaces = ARRAY_SIZE(xpcs_10gkr_interfaces),
1190 .an_mode = DW_AN_C73,
1191 },
1192 [DW_XPCS_XLGMII] = {
1193 .supported = xpcs_xlgmii_features,
1194 .interface = xpcs_xlgmii_interfaces,
1195 .num_interfaces = ARRAY_SIZE(xpcs_xlgmii_interfaces),
1196 .an_mode = DW_AN_C73,
1197 },
1198 [DW_XPCS_SGMII] = {
1199 .supported = xpcs_sgmii_features,
1200 .interface = xpcs_sgmii_interfaces,
1201 .num_interfaces = ARRAY_SIZE(xpcs_sgmii_interfaces),
1202 .an_mode = DW_AN_C37_SGMII,
1203 },
1204 [DW_XPCS_1000BASEX] = {
1205 .supported = xpcs_1000basex_features,
1206 .interface = xpcs_1000basex_interfaces,
1207 .num_interfaces = ARRAY_SIZE(xpcs_1000basex_interfaces),
1208 .an_mode = DW_AN_C37_1000BASEX,
1209 },
1210 [DW_XPCS_2500BASEX] = {
1211 .supported = xpcs_2500basex_features,
1212 .interface = xpcs_2500basex_interfaces,
1213 .num_interfaces = ARRAY_SIZE(xpcs_2500basex_features),
1214 .an_mode = DW_2500BASEX,
1215 },
1216};
1217
1218static const struct xpcs_compat nxp_sja1105_xpcs_compat[DW_XPCS_INTERFACE_MAX] = {
1219 [DW_XPCS_SGMII] = {
1220 .supported = xpcs_sgmii_features,
1221 .interface = xpcs_sgmii_interfaces,
1222 .num_interfaces = ARRAY_SIZE(xpcs_sgmii_interfaces),
1223 .an_mode = DW_AN_C37_SGMII,
1224 .pma_config = nxp_sja1105_sgmii_pma_config,
1225 },
1226};
1227
1228static const struct xpcs_compat nxp_sja1110_xpcs_compat[DW_XPCS_INTERFACE_MAX] = {
1229 [DW_XPCS_SGMII] = {
1230 .supported = xpcs_sgmii_features,
1231 .interface = xpcs_sgmii_interfaces,
1232 .num_interfaces = ARRAY_SIZE(xpcs_sgmii_interfaces),
1233 .an_mode = DW_AN_C37_SGMII,
1234 .pma_config = nxp_sja1110_sgmii_pma_config,
1235 },
1236 [DW_XPCS_2500BASEX] = {
1237 .supported = xpcs_2500basex_features,
1238 .interface = xpcs_2500basex_interfaces,
1239 .num_interfaces = ARRAY_SIZE(xpcs_2500basex_interfaces),
1240 .an_mode = DW_2500BASEX,
1241 .pma_config = nxp_sja1110_2500basex_pma_config,
1242 },
1243};
1244
1245static const struct xpcs_id xpcs_id_list[] = {
1246 {
1247 .id = SYNOPSYS_XPCS_ID,
1248 .mask = SYNOPSYS_XPCS_MASK,
1249 .compat = synopsys_xpcs_compat,
1250 }, {
1251 .id = NXP_SJA1105_XPCS_ID,
1252 .mask = SYNOPSYS_XPCS_MASK,
1253 .compat = nxp_sja1105_xpcs_compat,
1254 }, {
1255 .id = NXP_SJA1110_XPCS_ID,
1256 .mask = SYNOPSYS_XPCS_MASK,
1257 .compat = nxp_sja1110_xpcs_compat,
1258 },
1259};
1260
1261static const struct phylink_pcs_ops xpcs_phylink_ops = {
1262 .pcs_validate = xpcs_validate,
1263 .pcs_config = xpcs_config,
1264 .pcs_get_state = xpcs_get_state,
1265 .pcs_an_restart = xpcs_an_restart,
1266 .pcs_link_up = xpcs_link_up,
1267};
1268
1269struct dw_xpcs *xpcs_create(struct mdio_device *mdiodev,
1270 phy_interface_t interface)
1271{
1272 struct dw_xpcs *xpcs;
1273 u32 xpcs_id;
1274 int i, ret;
1275
1276 xpcs = kzalloc(sizeof(*xpcs), GFP_KERNEL);
1277 if (!xpcs)
1278 return ERR_PTR(-ENOMEM);
1279
1280 xpcs->mdiodev = mdiodev;
1281
1282 xpcs_id = xpcs_get_id(xpcs);
1283
1284 for (i = 0; i < ARRAY_SIZE(xpcs_id_list); i++) {
1285 const struct xpcs_id *entry = &xpcs_id_list[i];
1286 const struct xpcs_compat *compat;
1287
1288 if ((xpcs_id & entry->mask) != entry->id)
1289 continue;
1290
1291 xpcs->id = entry;
1292
1293 compat = xpcs_find_compat(entry, interface);
1294 if (!compat) {
1295 ret = -ENODEV;
1296 goto out;
1297 }
1298
1299 xpcs->pcs.ops = &xpcs_phylink_ops;
1300 xpcs->pcs.poll = true;
1301
1302 ret = xpcs_soft_reset(xpcs, compat);
1303 if (ret)
1304 goto out;
1305
1306 return xpcs;
1307 }
1308
1309 ret = -ENODEV;
1310
1311out:
1312 kfree(xpcs);
1313
1314 return ERR_PTR(ret);
1315}
1316EXPORT_SYMBOL_GPL(xpcs_create);
1317
1318void xpcs_destroy(struct dw_xpcs *xpcs)
1319{
1320 kfree(xpcs);
1321}
1322EXPORT_SYMBOL_GPL(xpcs_destroy);
1323
1324MODULE_LICENSE("GPL v2");