1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (c) 2020 Synopsys, Inc. and/or its affiliates.
4 * Synopsys DesignWare XPCS helpers
6 * Author: Jose Abreu <Jose.Abreu@synopsys.com>
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>
15 #define SYNOPSYS_XPCS_ID 0x7996ced0
16 #define SYNOPSYS_XPCS_MASK 0xffffffff
18 /* Vendor regs access */
19 #define DW_VENDOR BIT(15)
22 #define DW_USXGMII_RST BIT(10)
23 #define DW_USXGMII_EN BIT(9)
24 #define DW_VR_XS_PCS_DIG_STS 0x0010
25 #define DW_RXFIFO_ERR GENMASK(6, 5)
28 #define DW_USXGMII_FULL BIT(8)
29 #define DW_USXGMII_SS_MASK (BIT(13) | BIT(6) | BIT(5))
30 #define DW_USXGMII_10000 (BIT(13) | BIT(6))
31 #define DW_USXGMII_5000 (BIT(13) | BIT(5))
32 #define DW_USXGMII_2500 (BIT(5))
33 #define DW_USXGMII_1000 (BIT(6))
34 #define DW_USXGMII_100 (BIT(13))
35 #define DW_USXGMII_10 (0)
38 #define DW_SR_AN_ADV1 0x10
39 #define DW_SR_AN_ADV2 0x11
40 #define DW_SR_AN_ADV3 0x12
41 #define DW_SR_AN_LP_ABL1 0x13
42 #define DW_SR_AN_LP_ABL2 0x14
43 #define DW_SR_AN_LP_ABL3 0x15
45 /* Clause 73 Defines */
47 #define DW_C73_PAUSE BIT(10)
48 #define DW_C73_ASYM_PAUSE BIT(11)
49 #define DW_C73_AN_ADV_SF 0x1
51 #define DW_C73_1000KX BIT(5)
52 #define DW_C73_10000KX4 BIT(6)
53 #define DW_C73_10000KR BIT(7)
55 #define DW_C73_2500KX BIT(0)
56 #define DW_C73_5000KR BIT(1)
58 /* Clause 37 Defines */
59 /* VR MII MMD registers offsets */
60 #define DW_VR_MII_DIG_CTRL1 0x8000
61 #define DW_VR_MII_AN_CTRL 0x8001
62 #define DW_VR_MII_AN_INTR_STS 0x8002
63 /* EEE Mode Control Register */
64 #define DW_VR_MII_EEE_MCTRL0 0x8006
65 #define DW_VR_MII_EEE_MCTRL1 0x800b
67 /* VR_MII_DIG_CTRL1 */
68 #define DW_VR_MII_DIG_CTRL1_MAC_AUTO_SW BIT(9)
71 #define DW_VR_MII_AN_CTRL_TX_CONFIG_SHIFT 3
72 #define DW_VR_MII_TX_CONFIG_MASK BIT(3)
73 #define DW_VR_MII_TX_CONFIG_PHY_SIDE_SGMII 0x1
74 #define DW_VR_MII_TX_CONFIG_MAC_SIDE_SGMII 0x0
75 #define DW_VR_MII_AN_CTRL_PCS_MODE_SHIFT 1
76 #define DW_VR_MII_PCS_MODE_MASK GENMASK(2, 1)
77 #define DW_VR_MII_PCS_MODE_C37_1000BASEX 0x0
78 #define DW_VR_MII_PCS_MODE_C37_SGMII 0x2
80 /* VR_MII_AN_INTR_STS */
81 #define DW_VR_MII_AN_STS_C37_ANSGM_FD BIT(1)
82 #define DW_VR_MII_AN_STS_C37_ANSGM_SP_SHIFT 2
83 #define DW_VR_MII_AN_STS_C37_ANSGM_SP GENMASK(3, 2)
84 #define DW_VR_MII_C37_ANSGM_SP_10 0x0
85 #define DW_VR_MII_C37_ANSGM_SP_100 0x1
86 #define DW_VR_MII_C37_ANSGM_SP_1000 0x2
87 #define DW_VR_MII_C37_ANSGM_SP_LNKSTS BIT(4)
89 /* VR MII EEE Control 0 defines */
90 #define DW_VR_MII_EEE_LTX_EN BIT(0) /* LPI Tx Enable */
91 #define DW_VR_MII_EEE_LRX_EN BIT(1) /* LPI Rx Enable */
92 #define DW_VR_MII_EEE_TX_QUIET_EN BIT(2) /* Tx Quiet Enable */
93 #define DW_VR_MII_EEE_RX_QUIET_EN BIT(3) /* Rx Quiet Enable */
94 #define DW_VR_MII_EEE_TX_EN_CTRL BIT(4) /* Tx Control Enable */
95 #define DW_VR_MII_EEE_RX_EN_CTRL BIT(7) /* Rx Control Enable */
97 #define DW_VR_MII_EEE_MULT_FACT_100NS_SHIFT 8
98 #define DW_VR_MII_EEE_MULT_FACT_100NS GENMASK(11, 8)
100 /* VR MII EEE Control 1 defines */
101 #define DW_VR_MII_EEE_TRN_LPI BIT(0) /* Transparent Mode Enable */
103 static const int xpcs_usxgmii_features[] = {
104 ETHTOOL_LINK_MODE_Pause_BIT,
105 ETHTOOL_LINK_MODE_Asym_Pause_BIT,
106 ETHTOOL_LINK_MODE_Autoneg_BIT,
107 ETHTOOL_LINK_MODE_1000baseKX_Full_BIT,
108 ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT,
109 ETHTOOL_LINK_MODE_10000baseKR_Full_BIT,
110 ETHTOOL_LINK_MODE_2500baseX_Full_BIT,
111 __ETHTOOL_LINK_MODE_MASK_NBITS,
114 static const int xpcs_10gkr_features[] = {
115 ETHTOOL_LINK_MODE_Pause_BIT,
116 ETHTOOL_LINK_MODE_Asym_Pause_BIT,
117 ETHTOOL_LINK_MODE_10000baseKR_Full_BIT,
118 __ETHTOOL_LINK_MODE_MASK_NBITS,
121 static const int xpcs_xlgmii_features[] = {
122 ETHTOOL_LINK_MODE_Pause_BIT,
123 ETHTOOL_LINK_MODE_Asym_Pause_BIT,
124 ETHTOOL_LINK_MODE_25000baseCR_Full_BIT,
125 ETHTOOL_LINK_MODE_25000baseKR_Full_BIT,
126 ETHTOOL_LINK_MODE_25000baseSR_Full_BIT,
127 ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT,
128 ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT,
129 ETHTOOL_LINK_MODE_40000baseSR4_Full_BIT,
130 ETHTOOL_LINK_MODE_40000baseLR4_Full_BIT,
131 ETHTOOL_LINK_MODE_50000baseCR2_Full_BIT,
132 ETHTOOL_LINK_MODE_50000baseKR2_Full_BIT,
133 ETHTOOL_LINK_MODE_50000baseSR2_Full_BIT,
134 ETHTOOL_LINK_MODE_50000baseKR_Full_BIT,
135 ETHTOOL_LINK_MODE_50000baseSR_Full_BIT,
136 ETHTOOL_LINK_MODE_50000baseCR_Full_BIT,
137 ETHTOOL_LINK_MODE_50000baseLR_ER_FR_Full_BIT,
138 ETHTOOL_LINK_MODE_50000baseDR_Full_BIT,
139 ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT,
140 ETHTOOL_LINK_MODE_100000baseSR4_Full_BIT,
141 ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT,
142 ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT,
143 ETHTOOL_LINK_MODE_100000baseKR2_Full_BIT,
144 ETHTOOL_LINK_MODE_100000baseSR2_Full_BIT,
145 ETHTOOL_LINK_MODE_100000baseCR2_Full_BIT,
146 ETHTOOL_LINK_MODE_100000baseLR2_ER2_FR2_Full_BIT,
147 ETHTOOL_LINK_MODE_100000baseDR2_Full_BIT,
148 __ETHTOOL_LINK_MODE_MASK_NBITS,
151 static const int xpcs_sgmii_features[] = {
152 ETHTOOL_LINK_MODE_10baseT_Half_BIT,
153 ETHTOOL_LINK_MODE_10baseT_Full_BIT,
154 ETHTOOL_LINK_MODE_100baseT_Half_BIT,
155 ETHTOOL_LINK_MODE_100baseT_Full_BIT,
156 ETHTOOL_LINK_MODE_1000baseT_Half_BIT,
157 ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
158 __ETHTOOL_LINK_MODE_MASK_NBITS,
161 static const phy_interface_t xpcs_usxgmii_interfaces[] = {
162 PHY_INTERFACE_MODE_USXGMII,
165 static const phy_interface_t xpcs_10gkr_interfaces[] = {
166 PHY_INTERFACE_MODE_10GKR,
169 static const phy_interface_t xpcs_xlgmii_interfaces[] = {
170 PHY_INTERFACE_MODE_XLGMII,
173 static const phy_interface_t xpcs_sgmii_interfaces[] = {
174 PHY_INTERFACE_MODE_SGMII,
182 DW_XPCS_INTERFACE_MAX,
186 const int *supported;
187 const phy_interface_t *interface;
195 const struct xpcs_compat *compat;
198 static const struct xpcs_compat *xpcs_find_compat(const struct xpcs_id *id,
199 phy_interface_t interface)
203 for (i = 0; i < DW_XPCS_INTERFACE_MAX; i++) {
204 const struct xpcs_compat *compat = &id->compat[i];
206 for (j = 0; j < compat->num_interfaces; j++)
207 if (compat->interface[j] == interface)
214 int xpcs_get_an_mode(struct mdio_xpcs_args *xpcs, phy_interface_t interface)
216 const struct xpcs_compat *compat;
218 compat = xpcs_find_compat(xpcs->id, interface);
222 return compat->an_mode;
224 EXPORT_SYMBOL_GPL(xpcs_get_an_mode);
226 static bool __xpcs_linkmode_supported(const struct xpcs_compat *compat,
227 enum ethtool_link_mode_bit_indices linkmode)
231 for (i = 0; compat->supported[i] != __ETHTOOL_LINK_MODE_MASK_NBITS; i++)
232 if (compat->supported[i] == linkmode)
238 #define xpcs_linkmode_supported(compat, mode) \
239 __xpcs_linkmode_supported(compat, ETHTOOL_LINK_MODE_ ## mode ## _BIT)
241 static int xpcs_read(struct mdio_xpcs_args *xpcs, int dev, u32 reg)
243 u32 reg_addr = mdiobus_c45_addr(dev, reg);
244 struct mii_bus *bus = xpcs->mdiodev->bus;
245 int addr = xpcs->mdiodev->addr;
247 return mdiobus_read(bus, addr, reg_addr);
250 static int xpcs_write(struct mdio_xpcs_args *xpcs, int dev, u32 reg, u16 val)
252 u32 reg_addr = mdiobus_c45_addr(dev, reg);
253 struct mii_bus *bus = xpcs->mdiodev->bus;
254 int addr = xpcs->mdiodev->addr;
256 return mdiobus_write(bus, addr, reg_addr, val);
259 static int xpcs_read_vendor(struct mdio_xpcs_args *xpcs, int dev, u32 reg)
261 return xpcs_read(xpcs, dev, DW_VENDOR | reg);
264 static int xpcs_write_vendor(struct mdio_xpcs_args *xpcs, int dev, int reg,
267 return xpcs_write(xpcs, dev, DW_VENDOR | reg, val);
270 static int xpcs_read_vpcs(struct mdio_xpcs_args *xpcs, int reg)
272 return xpcs_read_vendor(xpcs, MDIO_MMD_PCS, reg);
275 static int xpcs_write_vpcs(struct mdio_xpcs_args *xpcs, int reg, u16 val)
277 return xpcs_write_vendor(xpcs, MDIO_MMD_PCS, reg, val);
280 static int xpcs_poll_reset(struct mdio_xpcs_args *xpcs, int dev)
282 /* Poll until the reset bit clears (50ms per retry == 0.6 sec) */
283 unsigned int retries = 12;
288 ret = xpcs_read(xpcs, dev, MDIO_CTRL1);
291 } while (ret & MDIO_CTRL1_RESET && --retries);
293 return (ret & MDIO_CTRL1_RESET) ? -ETIMEDOUT : 0;
296 static int xpcs_soft_reset(struct mdio_xpcs_args *xpcs,
297 const struct xpcs_compat *compat)
301 switch (compat->an_mode) {
305 case DW_AN_C37_SGMII:
306 dev = MDIO_MMD_VEND2;
312 ret = xpcs_write(xpcs, dev, MDIO_CTRL1, MDIO_CTRL1_RESET);
316 return xpcs_poll_reset(xpcs, dev);
319 #define xpcs_warn(__xpcs, __state, __args...) \
321 if ((__state)->link) \
322 dev_warn(&(__xpcs)->mdiodev->dev, ##__args); \
325 static int xpcs_read_fault_c73(struct mdio_xpcs_args *xpcs,
326 struct phylink_link_state *state)
330 ret = xpcs_read(xpcs, MDIO_MMD_PCS, MDIO_STAT1);
334 if (ret & MDIO_STAT1_FAULT) {
335 xpcs_warn(xpcs, state, "Link fault condition detected!\n");
339 ret = xpcs_read(xpcs, MDIO_MMD_PCS, MDIO_STAT2);
343 if (ret & MDIO_STAT2_RXFAULT)
344 xpcs_warn(xpcs, state, "Receiver fault detected!\n");
345 if (ret & MDIO_STAT2_TXFAULT)
346 xpcs_warn(xpcs, state, "Transmitter fault detected!\n");
348 ret = xpcs_read_vendor(xpcs, MDIO_MMD_PCS, DW_VR_XS_PCS_DIG_STS);
352 if (ret & DW_RXFIFO_ERR) {
353 xpcs_warn(xpcs, state, "FIFO fault condition detected!\n");
357 ret = xpcs_read(xpcs, MDIO_MMD_PCS, MDIO_PCS_10GBRT_STAT1);
361 if (!(ret & MDIO_PCS_10GBRT_STAT1_BLKLK))
362 xpcs_warn(xpcs, state, "Link is not locked!\n");
364 ret = xpcs_read(xpcs, MDIO_MMD_PCS, MDIO_PCS_10GBRT_STAT2);
368 if (ret & MDIO_PCS_10GBRT_STAT2_ERR) {
369 xpcs_warn(xpcs, state, "Link has errors!\n");
376 static int xpcs_read_link_c73(struct mdio_xpcs_args *xpcs, bool an)
381 ret = xpcs_read(xpcs, MDIO_MMD_PCS, MDIO_STAT1);
385 if (!(ret & MDIO_STAT1_LSTATUS))
389 ret = xpcs_read(xpcs, MDIO_MMD_AN, MDIO_STAT1);
393 if (!(ret & MDIO_STAT1_LSTATUS))
400 static int xpcs_get_max_usxgmii_speed(const unsigned long *supported)
402 int max = SPEED_UNKNOWN;
404 if (phylink_test(supported, 1000baseKX_Full))
406 if (phylink_test(supported, 2500baseX_Full))
408 if (phylink_test(supported, 10000baseKX4_Full))
410 if (phylink_test(supported, 10000baseKR_Full))
416 static int xpcs_config_usxgmii(struct mdio_xpcs_args *xpcs, int speed)
422 speed_sel = DW_USXGMII_10;
425 speed_sel = DW_USXGMII_100;
428 speed_sel = DW_USXGMII_1000;
431 speed_sel = DW_USXGMII_2500;
434 speed_sel = DW_USXGMII_5000;
437 speed_sel = DW_USXGMII_10000;
440 /* Nothing to do here */
444 ret = xpcs_read_vpcs(xpcs, MDIO_CTRL1);
448 ret = xpcs_write_vpcs(xpcs, MDIO_CTRL1, ret | DW_USXGMII_EN);
452 ret = xpcs_read(xpcs, MDIO_MMD_VEND2, MDIO_CTRL1);
456 ret &= ~DW_USXGMII_SS_MASK;
457 ret |= speed_sel | DW_USXGMII_FULL;
459 ret = xpcs_write(xpcs, MDIO_MMD_VEND2, MDIO_CTRL1, ret);
463 ret = xpcs_read_vpcs(xpcs, MDIO_CTRL1);
467 return xpcs_write_vpcs(xpcs, MDIO_CTRL1, ret | DW_USXGMII_RST);
470 static int _xpcs_config_aneg_c73(struct mdio_xpcs_args *xpcs,
471 const struct xpcs_compat *compat)
475 /* By default, in USXGMII mode XPCS operates at 10G baud and
476 * replicates data to achieve lower speeds. Hereby, in this
477 * default configuration we need to advertise all supported
478 * modes and not only the ones we want to use.
483 if (xpcs_linkmode_supported(compat, 2500baseX_Full))
484 adv |= DW_C73_2500KX;
486 /* TODO: 5000baseKR */
488 ret = xpcs_write(xpcs, MDIO_MMD_AN, DW_SR_AN_ADV3, adv);
494 if (xpcs_linkmode_supported(compat, 1000baseKX_Full))
495 adv |= DW_C73_1000KX;
496 if (xpcs_linkmode_supported(compat, 10000baseKX4_Full))
497 adv |= DW_C73_10000KX4;
498 if (xpcs_linkmode_supported(compat, 10000baseKR_Full))
499 adv |= DW_C73_10000KR;
501 ret = xpcs_write(xpcs, MDIO_MMD_AN, DW_SR_AN_ADV2, adv);
506 adv = DW_C73_AN_ADV_SF;
507 if (xpcs_linkmode_supported(compat, Pause))
509 if (xpcs_linkmode_supported(compat, Asym_Pause))
510 adv |= DW_C73_ASYM_PAUSE;
512 return xpcs_write(xpcs, MDIO_MMD_AN, DW_SR_AN_ADV1, adv);
515 static int xpcs_config_aneg_c73(struct mdio_xpcs_args *xpcs,
516 const struct xpcs_compat *compat)
520 ret = _xpcs_config_aneg_c73(xpcs, compat);
524 ret = xpcs_read(xpcs, MDIO_MMD_AN, MDIO_CTRL1);
528 ret |= MDIO_AN_CTRL1_ENABLE | MDIO_AN_CTRL1_RESTART;
530 return xpcs_write(xpcs, MDIO_MMD_AN, MDIO_CTRL1, ret);
533 static int xpcs_aneg_done_c73(struct mdio_xpcs_args *xpcs,
534 struct phylink_link_state *state,
535 const struct xpcs_compat *compat)
539 ret = xpcs_read(xpcs, MDIO_MMD_AN, MDIO_STAT1);
543 if (ret & MDIO_AN_STAT1_COMPLETE) {
544 ret = xpcs_read(xpcs, MDIO_MMD_AN, DW_SR_AN_LP_ABL1);
548 /* Check if Aneg outcome is valid */
549 if (!(ret & DW_C73_AN_ADV_SF)) {
550 xpcs_config_aneg_c73(xpcs, compat);
560 static int xpcs_read_lpa_c73(struct mdio_xpcs_args *xpcs,
561 struct phylink_link_state *state)
565 ret = xpcs_read(xpcs, MDIO_MMD_AN, MDIO_STAT1);
569 if (!(ret & MDIO_AN_STAT1_LPABLE)) {
570 phylink_clear(state->lp_advertising, Autoneg);
574 phylink_set(state->lp_advertising, Autoneg);
576 /* Clause 73 outcome */
577 ret = xpcs_read(xpcs, MDIO_MMD_AN, DW_SR_AN_LP_ABL3);
581 if (ret & DW_C73_2500KX)
582 phylink_set(state->lp_advertising, 2500baseX_Full);
584 ret = xpcs_read(xpcs, MDIO_MMD_AN, DW_SR_AN_LP_ABL2);
588 if (ret & DW_C73_1000KX)
589 phylink_set(state->lp_advertising, 1000baseKX_Full);
590 if (ret & DW_C73_10000KX4)
591 phylink_set(state->lp_advertising, 10000baseKX4_Full);
592 if (ret & DW_C73_10000KR)
593 phylink_set(state->lp_advertising, 10000baseKR_Full);
595 ret = xpcs_read(xpcs, MDIO_MMD_AN, DW_SR_AN_LP_ABL1);
599 if (ret & DW_C73_PAUSE)
600 phylink_set(state->lp_advertising, Pause);
601 if (ret & DW_C73_ASYM_PAUSE)
602 phylink_set(state->lp_advertising, Asym_Pause);
604 linkmode_and(state->lp_advertising, state->lp_advertising,
609 static void xpcs_resolve_lpa_c73(struct mdio_xpcs_args *xpcs,
610 struct phylink_link_state *state)
612 int max_speed = xpcs_get_max_usxgmii_speed(state->lp_advertising);
614 state->pause = MLO_PAUSE_TX | MLO_PAUSE_RX;
615 state->speed = max_speed;
616 state->duplex = DUPLEX_FULL;
619 static int xpcs_get_max_xlgmii_speed(struct mdio_xpcs_args *xpcs,
620 struct phylink_link_state *state)
622 unsigned long *adv = state->advertising;
623 int speed = SPEED_UNKNOWN;
626 for_each_set_bit(bit, adv, __ETHTOOL_LINK_MODE_MASK_NBITS) {
627 int new_speed = SPEED_UNKNOWN;
630 case ETHTOOL_LINK_MODE_25000baseCR_Full_BIT:
631 case ETHTOOL_LINK_MODE_25000baseKR_Full_BIT:
632 case ETHTOOL_LINK_MODE_25000baseSR_Full_BIT:
633 new_speed = SPEED_25000;
635 case ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT:
636 case ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT:
637 case ETHTOOL_LINK_MODE_40000baseSR4_Full_BIT:
638 case ETHTOOL_LINK_MODE_40000baseLR4_Full_BIT:
639 new_speed = SPEED_40000;
641 case ETHTOOL_LINK_MODE_50000baseCR2_Full_BIT:
642 case ETHTOOL_LINK_MODE_50000baseKR2_Full_BIT:
643 case ETHTOOL_LINK_MODE_50000baseSR2_Full_BIT:
644 case ETHTOOL_LINK_MODE_50000baseKR_Full_BIT:
645 case ETHTOOL_LINK_MODE_50000baseSR_Full_BIT:
646 case ETHTOOL_LINK_MODE_50000baseCR_Full_BIT:
647 case ETHTOOL_LINK_MODE_50000baseLR_ER_FR_Full_BIT:
648 case ETHTOOL_LINK_MODE_50000baseDR_Full_BIT:
649 new_speed = SPEED_50000;
651 case ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT:
652 case ETHTOOL_LINK_MODE_100000baseSR4_Full_BIT:
653 case ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT:
654 case ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT:
655 case ETHTOOL_LINK_MODE_100000baseKR2_Full_BIT:
656 case ETHTOOL_LINK_MODE_100000baseSR2_Full_BIT:
657 case ETHTOOL_LINK_MODE_100000baseCR2_Full_BIT:
658 case ETHTOOL_LINK_MODE_100000baseLR2_ER2_FR2_Full_BIT:
659 case ETHTOOL_LINK_MODE_100000baseDR2_Full_BIT:
660 new_speed = SPEED_100000;
666 if (new_speed > speed)
673 static void xpcs_resolve_pma(struct mdio_xpcs_args *xpcs,
674 struct phylink_link_state *state)
676 state->pause = MLO_PAUSE_TX | MLO_PAUSE_RX;
677 state->duplex = DUPLEX_FULL;
679 switch (state->interface) {
680 case PHY_INTERFACE_MODE_10GKR:
681 state->speed = SPEED_10000;
683 case PHY_INTERFACE_MODE_XLGMII:
684 state->speed = xpcs_get_max_xlgmii_speed(xpcs, state);
687 state->speed = SPEED_UNKNOWN;
692 void xpcs_validate(struct mdio_xpcs_args *xpcs, unsigned long *supported,
693 struct phylink_link_state *state)
695 __ETHTOOL_DECLARE_LINK_MODE_MASK(xpcs_supported);
696 const struct xpcs_compat *compat;
699 /* phylink expects us to report all supported modes with
700 * PHY_INTERFACE_MODE_NA, just don't limit the supported and
701 * advertising masks and exit.
703 if (state->interface == PHY_INTERFACE_MODE_NA)
706 bitmap_zero(xpcs_supported, __ETHTOOL_LINK_MODE_MASK_NBITS);
708 compat = xpcs_find_compat(xpcs->id, state->interface);
710 /* Populate the supported link modes for this
714 for (i = 0; compat->supported[i] != __ETHTOOL_LINK_MODE_MASK_NBITS; i++)
715 set_bit(compat->supported[i], xpcs_supported);
717 linkmode_and(supported, supported, xpcs_supported);
718 linkmode_and(state->advertising, state->advertising, xpcs_supported);
720 EXPORT_SYMBOL_GPL(xpcs_validate);
722 int xpcs_config_eee(struct mdio_xpcs_args *xpcs, int mult_fact_100ns,
729 ret = DW_VR_MII_EEE_LTX_EN | DW_VR_MII_EEE_LRX_EN |
730 DW_VR_MII_EEE_TX_QUIET_EN | DW_VR_MII_EEE_RX_QUIET_EN |
731 DW_VR_MII_EEE_TX_EN_CTRL | DW_VR_MII_EEE_RX_EN_CTRL |
732 mult_fact_100ns << DW_VR_MII_EEE_MULT_FACT_100NS_SHIFT;
734 ret = xpcs_read(xpcs, MDIO_MMD_VEND2, DW_VR_MII_EEE_MCTRL0);
737 ret &= ~(DW_VR_MII_EEE_LTX_EN | DW_VR_MII_EEE_LRX_EN |
738 DW_VR_MII_EEE_TX_QUIET_EN | DW_VR_MII_EEE_RX_QUIET_EN |
739 DW_VR_MII_EEE_TX_EN_CTRL | DW_VR_MII_EEE_RX_EN_CTRL |
740 DW_VR_MII_EEE_MULT_FACT_100NS);
743 ret = xpcs_write(xpcs, MDIO_MMD_VEND2, DW_VR_MII_EEE_MCTRL0, ret);
747 ret = xpcs_read(xpcs, MDIO_MMD_VEND2, DW_VR_MII_EEE_MCTRL1);
751 ret |= DW_VR_MII_EEE_TRN_LPI;
752 return xpcs_write(xpcs, MDIO_MMD_VEND2, DW_VR_MII_EEE_MCTRL1, ret);
754 EXPORT_SYMBOL_GPL(xpcs_config_eee);
756 static int xpcs_config_aneg_c37_sgmii(struct mdio_xpcs_args *xpcs)
760 /* For AN for C37 SGMII mode, the settings are :-
761 * 1) VR_MII_AN_CTRL Bit(2:1)[PCS_MODE] = 10b (SGMII AN)
762 * 2) VR_MII_AN_CTRL Bit(3) [TX_CONFIG] = 0b (MAC side SGMII)
763 * DW xPCS used with DW EQoS MAC is always MAC side SGMII.
764 * 3) VR_MII_DIG_CTRL1 Bit(9) [MAC_AUTO_SW] = 1b (Automatic
765 * speed/duplex mode change by HW after SGMII AN complete)
767 * Note: Since it is MAC side SGMII, there is no need to set
768 * SR_MII_AN_ADV. MAC side SGMII receives AN Tx Config from
769 * PHY about the link state change after C28 AN is completed
770 * between PHY and Link Partner. There is also no need to
771 * trigger AN restart for MAC-side SGMII.
773 ret = xpcs_read(xpcs, MDIO_MMD_VEND2, DW_VR_MII_AN_CTRL);
777 ret &= ~(DW_VR_MII_PCS_MODE_MASK | DW_VR_MII_TX_CONFIG_MASK);
778 ret |= (DW_VR_MII_PCS_MODE_C37_SGMII <<
779 DW_VR_MII_AN_CTRL_PCS_MODE_SHIFT &
780 DW_VR_MII_PCS_MODE_MASK);
781 ret |= (DW_VR_MII_TX_CONFIG_MAC_SIDE_SGMII <<
782 DW_VR_MII_AN_CTRL_TX_CONFIG_SHIFT &
783 DW_VR_MII_TX_CONFIG_MASK);
784 ret = xpcs_write(xpcs, MDIO_MMD_VEND2, DW_VR_MII_AN_CTRL, ret);
788 ret = xpcs_read(xpcs, MDIO_MMD_VEND2, DW_VR_MII_DIG_CTRL1);
792 ret |= DW_VR_MII_DIG_CTRL1_MAC_AUTO_SW;
794 return xpcs_write(xpcs, MDIO_MMD_VEND2, DW_VR_MII_DIG_CTRL1, ret);
797 static int xpcs_config(struct mdio_xpcs_args *xpcs,
798 const struct phylink_link_state *state)
800 const struct xpcs_compat *compat;
803 compat = xpcs_find_compat(xpcs->id, state->interface);
807 switch (compat->an_mode) {
809 if (state->an_enabled) {
810 ret = xpcs_config_aneg_c73(xpcs, compat);
815 case DW_AN_C37_SGMII:
816 ret = xpcs_config_aneg_c37_sgmii(xpcs);
827 static int xpcs_get_state_c73(struct mdio_xpcs_args *xpcs,
828 struct phylink_link_state *state,
829 const struct xpcs_compat *compat)
833 /* Link needs to be read first ... */
834 state->link = xpcs_read_link_c73(xpcs, state->an_enabled) > 0 ? 1 : 0;
836 /* ... and then we check the faults. */
837 ret = xpcs_read_fault_c73(xpcs, state);
839 ret = xpcs_soft_reset(xpcs, compat);
845 return xpcs_config(xpcs, state);
848 if (state->an_enabled && xpcs_aneg_done_c73(xpcs, state, compat)) {
849 state->an_complete = true;
850 xpcs_read_lpa_c73(xpcs, state);
851 xpcs_resolve_lpa_c73(xpcs, state);
852 } else if (state->an_enabled) {
854 } else if (state->link) {
855 xpcs_resolve_pma(xpcs, state);
861 static int xpcs_get_state_c37_sgmii(struct mdio_xpcs_args *xpcs,
862 struct phylink_link_state *state)
866 /* Reset link_state */
868 state->speed = SPEED_UNKNOWN;
869 state->duplex = DUPLEX_UNKNOWN;
872 /* For C37 SGMII mode, we check DW_VR_MII_AN_INTR_STS for link
873 * status, speed and duplex.
875 ret = xpcs_read(xpcs, MDIO_MMD_VEND2, DW_VR_MII_AN_INTR_STS);
879 if (ret & DW_VR_MII_C37_ANSGM_SP_LNKSTS) {
884 speed_value = (ret & DW_VR_MII_AN_STS_C37_ANSGM_SP) >>
885 DW_VR_MII_AN_STS_C37_ANSGM_SP_SHIFT;
886 if (speed_value == DW_VR_MII_C37_ANSGM_SP_1000)
887 state->speed = SPEED_1000;
888 else if (speed_value == DW_VR_MII_C37_ANSGM_SP_100)
889 state->speed = SPEED_100;
891 state->speed = SPEED_10;
893 if (ret & DW_VR_MII_AN_STS_C37_ANSGM_FD)
894 state->duplex = DUPLEX_FULL;
896 state->duplex = DUPLEX_HALF;
902 static int xpcs_get_state(struct mdio_xpcs_args *xpcs,
903 struct phylink_link_state *state)
905 const struct xpcs_compat *compat;
908 compat = xpcs_find_compat(xpcs->id, state->interface);
912 switch (compat->an_mode) {
914 ret = xpcs_get_state_c73(xpcs, state, compat);
918 case DW_AN_C37_SGMII:
919 ret = xpcs_get_state_c37_sgmii(xpcs, state);
930 static int xpcs_link_up(struct mdio_xpcs_args *xpcs, int speed,
931 phy_interface_t interface)
933 if (interface == PHY_INTERFACE_MODE_USXGMII)
934 return xpcs_config_usxgmii(xpcs, speed);
939 static u32 xpcs_get_id(struct mdio_xpcs_args *xpcs)
944 /* First, search C73 PCS using PCS MMD */
945 ret = xpcs_read(xpcs, MDIO_MMD_PCS, MII_PHYSID1);
951 ret = xpcs_read(xpcs, MDIO_MMD_PCS, MII_PHYSID2);
955 /* If Device IDs are not all zeros, we found C73 AN-type device */
959 /* Next, search C37 PCS using Vendor-Specific MII MMD */
960 ret = xpcs_read(xpcs, MDIO_MMD_VEND2, MII_PHYSID1);
966 ret = xpcs_read(xpcs, MDIO_MMD_VEND2, MII_PHYSID2);
970 /* If Device IDs are not all zeros, we found C37 AN-type device */
977 static const struct xpcs_compat synopsys_xpcs_compat[DW_XPCS_INTERFACE_MAX] = {
978 [DW_XPCS_USXGMII] = {
979 .supported = xpcs_usxgmii_features,
980 .interface = xpcs_usxgmii_interfaces,
981 .num_interfaces = ARRAY_SIZE(xpcs_usxgmii_interfaces),
982 .an_mode = DW_AN_C73,
985 .supported = xpcs_10gkr_features,
986 .interface = xpcs_10gkr_interfaces,
987 .num_interfaces = ARRAY_SIZE(xpcs_10gkr_interfaces),
988 .an_mode = DW_AN_C73,
991 .supported = xpcs_xlgmii_features,
992 .interface = xpcs_xlgmii_interfaces,
993 .num_interfaces = ARRAY_SIZE(xpcs_xlgmii_interfaces),
994 .an_mode = DW_AN_C73,
997 .supported = xpcs_sgmii_features,
998 .interface = xpcs_sgmii_interfaces,
999 .num_interfaces = ARRAY_SIZE(xpcs_sgmii_interfaces),
1000 .an_mode = DW_AN_C37_SGMII,
1004 static const struct xpcs_id xpcs_id_list[] = {
1006 .id = SYNOPSYS_XPCS_ID,
1007 .mask = SYNOPSYS_XPCS_MASK,
1008 .compat = synopsys_xpcs_compat,
1012 struct mdio_xpcs_args *xpcs_create(struct mdio_device *mdiodev,
1013 phy_interface_t interface)
1015 struct mdio_xpcs_args *xpcs;
1019 xpcs = kzalloc(sizeof(*xpcs), GFP_KERNEL);
1023 xpcs->mdiodev = mdiodev;
1025 xpcs_id = xpcs_get_id(xpcs);
1027 for (i = 0; i < ARRAY_SIZE(xpcs_id_list); i++) {
1028 const struct xpcs_id *entry = &xpcs_id_list[i];
1029 const struct xpcs_compat *compat;
1031 if ((xpcs_id & entry->mask) != entry->id)
1036 compat = xpcs_find_compat(entry, interface);
1042 ret = xpcs_soft_reset(xpcs, compat);
1054 return ERR_PTR(ret);
1056 EXPORT_SYMBOL_GPL(xpcs_create);
1058 void xpcs_destroy(struct mdio_xpcs_args *xpcs)
1062 EXPORT_SYMBOL_GPL(xpcs_destroy);
1064 static struct mdio_xpcs_ops xpcs_ops = {
1065 .config = xpcs_config,
1066 .get_state = xpcs_get_state,
1067 .link_up = xpcs_link_up,
1070 struct mdio_xpcs_ops *mdio_xpcs_get_ops(void)
1074 EXPORT_SYMBOL_GPL(mdio_xpcs_get_ops);
1076 MODULE_LICENSE("GPL v2");