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