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 = MII_ADDR_C45 | dev << 16 | reg;
245 return mdiobus_read(xpcs->bus, xpcs->addr, reg_addr);
248 static int xpcs_write(struct mdio_xpcs_args *xpcs, int dev, u32 reg, u16 val)
250 u32 reg_addr = MII_ADDR_C45 | dev << 16 | reg;
252 return mdiobus_write(xpcs->bus, xpcs->addr, reg_addr, val);
255 static int xpcs_read_vendor(struct mdio_xpcs_args *xpcs, int dev, u32 reg)
257 return xpcs_read(xpcs, dev, DW_VENDOR | reg);
260 static int xpcs_write_vendor(struct mdio_xpcs_args *xpcs, int dev, int reg,
263 return xpcs_write(xpcs, dev, DW_VENDOR | reg, val);
266 static int xpcs_read_vpcs(struct mdio_xpcs_args *xpcs, int reg)
268 return xpcs_read_vendor(xpcs, MDIO_MMD_PCS, reg);
271 static int xpcs_write_vpcs(struct mdio_xpcs_args *xpcs, int reg, u16 val)
273 return xpcs_write_vendor(xpcs, MDIO_MMD_PCS, reg, val);
276 static int xpcs_poll_reset(struct mdio_xpcs_args *xpcs, int dev)
278 /* Poll until the reset bit clears (50ms per retry == 0.6 sec) */
279 unsigned int retries = 12;
284 ret = xpcs_read(xpcs, dev, MDIO_CTRL1);
287 } while (ret & MDIO_CTRL1_RESET && --retries);
289 return (ret & MDIO_CTRL1_RESET) ? -ETIMEDOUT : 0;
292 static int xpcs_soft_reset(struct mdio_xpcs_args *xpcs,
293 const struct xpcs_compat *compat)
297 switch (compat->an_mode) {
301 case DW_AN_C37_SGMII:
302 dev = MDIO_MMD_VEND2;
308 ret = xpcs_write(xpcs, dev, MDIO_CTRL1, MDIO_CTRL1_RESET);
312 return xpcs_poll_reset(xpcs, dev);
315 #define xpcs_warn(__xpcs, __state, __args...) \
317 if ((__state)->link) \
318 dev_warn(&(__xpcs)->bus->dev, ##__args); \
321 static int xpcs_read_fault_c73(struct mdio_xpcs_args *xpcs,
322 struct phylink_link_state *state)
326 ret = xpcs_read(xpcs, MDIO_MMD_PCS, MDIO_STAT1);
330 if (ret & MDIO_STAT1_FAULT) {
331 xpcs_warn(xpcs, state, "Link fault condition detected!\n");
335 ret = xpcs_read(xpcs, MDIO_MMD_PCS, MDIO_STAT2);
339 if (ret & MDIO_STAT2_RXFAULT)
340 xpcs_warn(xpcs, state, "Receiver fault detected!\n");
341 if (ret & MDIO_STAT2_TXFAULT)
342 xpcs_warn(xpcs, state, "Transmitter fault detected!\n");
344 ret = xpcs_read_vendor(xpcs, MDIO_MMD_PCS, DW_VR_XS_PCS_DIG_STS);
348 if (ret & DW_RXFIFO_ERR) {
349 xpcs_warn(xpcs, state, "FIFO fault condition detected!\n");
353 ret = xpcs_read(xpcs, MDIO_MMD_PCS, MDIO_PCS_10GBRT_STAT1);
357 if (!(ret & MDIO_PCS_10GBRT_STAT1_BLKLK))
358 xpcs_warn(xpcs, state, "Link is not locked!\n");
360 ret = xpcs_read(xpcs, MDIO_MMD_PCS, MDIO_PCS_10GBRT_STAT2);
364 if (ret & MDIO_PCS_10GBRT_STAT2_ERR) {
365 xpcs_warn(xpcs, state, "Link has errors!\n");
372 static int xpcs_read_link_c73(struct mdio_xpcs_args *xpcs, bool an)
377 ret = xpcs_read(xpcs, MDIO_MMD_PCS, MDIO_STAT1);
381 if (!(ret & MDIO_STAT1_LSTATUS))
385 ret = xpcs_read(xpcs, MDIO_MMD_AN, MDIO_STAT1);
389 if (!(ret & MDIO_STAT1_LSTATUS))
396 static int xpcs_get_max_usxgmii_speed(const unsigned long *supported)
398 int max = SPEED_UNKNOWN;
400 if (phylink_test(supported, 1000baseKX_Full))
402 if (phylink_test(supported, 2500baseX_Full))
404 if (phylink_test(supported, 10000baseKX4_Full))
406 if (phylink_test(supported, 10000baseKR_Full))
412 static int xpcs_config_usxgmii(struct mdio_xpcs_args *xpcs, int speed)
418 speed_sel = DW_USXGMII_10;
421 speed_sel = DW_USXGMII_100;
424 speed_sel = DW_USXGMII_1000;
427 speed_sel = DW_USXGMII_2500;
430 speed_sel = DW_USXGMII_5000;
433 speed_sel = DW_USXGMII_10000;
436 /* Nothing to do here */
440 ret = xpcs_read_vpcs(xpcs, MDIO_CTRL1);
444 ret = xpcs_write_vpcs(xpcs, MDIO_CTRL1, ret | DW_USXGMII_EN);
448 ret = xpcs_read(xpcs, MDIO_MMD_VEND2, MDIO_CTRL1);
452 ret &= ~DW_USXGMII_SS_MASK;
453 ret |= speed_sel | DW_USXGMII_FULL;
455 ret = xpcs_write(xpcs, MDIO_MMD_VEND2, MDIO_CTRL1, ret);
459 ret = xpcs_read_vpcs(xpcs, MDIO_CTRL1);
463 return xpcs_write_vpcs(xpcs, MDIO_CTRL1, ret | DW_USXGMII_RST);
466 static int _xpcs_config_aneg_c73(struct mdio_xpcs_args *xpcs,
467 const struct xpcs_compat *compat)
471 /* By default, in USXGMII mode XPCS operates at 10G baud and
472 * replicates data to achieve lower speeds. Hereby, in this
473 * default configuration we need to advertise all supported
474 * modes and not only the ones we want to use.
479 if (xpcs_linkmode_supported(compat, 2500baseX_Full))
480 adv |= DW_C73_2500KX;
482 /* TODO: 5000baseKR */
484 ret = xpcs_write(xpcs, MDIO_MMD_AN, DW_SR_AN_ADV3, adv);
490 if (xpcs_linkmode_supported(compat, 1000baseKX_Full))
491 adv |= DW_C73_1000KX;
492 if (xpcs_linkmode_supported(compat, 10000baseKX4_Full))
493 adv |= DW_C73_10000KX4;
494 if (xpcs_linkmode_supported(compat, 10000baseKR_Full))
495 adv |= DW_C73_10000KR;
497 ret = xpcs_write(xpcs, MDIO_MMD_AN, DW_SR_AN_ADV2, adv);
502 adv = DW_C73_AN_ADV_SF;
503 if (xpcs_linkmode_supported(compat, Pause))
505 if (xpcs_linkmode_supported(compat, Asym_Pause))
506 adv |= DW_C73_ASYM_PAUSE;
508 return xpcs_write(xpcs, MDIO_MMD_AN, DW_SR_AN_ADV1, adv);
511 static int xpcs_config_aneg_c73(struct mdio_xpcs_args *xpcs,
512 const struct xpcs_compat *compat)
516 ret = _xpcs_config_aneg_c73(xpcs, compat);
520 ret = xpcs_read(xpcs, MDIO_MMD_AN, MDIO_CTRL1);
524 ret |= MDIO_AN_CTRL1_ENABLE | MDIO_AN_CTRL1_RESTART;
526 return xpcs_write(xpcs, MDIO_MMD_AN, MDIO_CTRL1, ret);
529 static int xpcs_aneg_done_c73(struct mdio_xpcs_args *xpcs,
530 struct phylink_link_state *state,
531 const struct xpcs_compat *compat)
535 ret = xpcs_read(xpcs, MDIO_MMD_AN, MDIO_STAT1);
539 if (ret & MDIO_AN_STAT1_COMPLETE) {
540 ret = xpcs_read(xpcs, MDIO_MMD_AN, DW_SR_AN_LP_ABL1);
544 /* Check if Aneg outcome is valid */
545 if (!(ret & DW_C73_AN_ADV_SF)) {
546 xpcs_config_aneg_c73(xpcs, compat);
556 static int xpcs_read_lpa_c73(struct mdio_xpcs_args *xpcs,
557 struct phylink_link_state *state)
561 ret = xpcs_read(xpcs, MDIO_MMD_AN, MDIO_STAT1);
565 if (!(ret & MDIO_AN_STAT1_LPABLE)) {
566 phylink_clear(state->lp_advertising, Autoneg);
570 phylink_set(state->lp_advertising, Autoneg);
572 /* Clause 73 outcome */
573 ret = xpcs_read(xpcs, MDIO_MMD_AN, DW_SR_AN_LP_ABL3);
577 if (ret & DW_C73_2500KX)
578 phylink_set(state->lp_advertising, 2500baseX_Full);
580 ret = xpcs_read(xpcs, MDIO_MMD_AN, DW_SR_AN_LP_ABL2);
584 if (ret & DW_C73_1000KX)
585 phylink_set(state->lp_advertising, 1000baseKX_Full);
586 if (ret & DW_C73_10000KX4)
587 phylink_set(state->lp_advertising, 10000baseKX4_Full);
588 if (ret & DW_C73_10000KR)
589 phylink_set(state->lp_advertising, 10000baseKR_Full);
591 ret = xpcs_read(xpcs, MDIO_MMD_AN, DW_SR_AN_LP_ABL1);
595 if (ret & DW_C73_PAUSE)
596 phylink_set(state->lp_advertising, Pause);
597 if (ret & DW_C73_ASYM_PAUSE)
598 phylink_set(state->lp_advertising, Asym_Pause);
600 linkmode_and(state->lp_advertising, state->lp_advertising,
605 static void xpcs_resolve_lpa_c73(struct mdio_xpcs_args *xpcs,
606 struct phylink_link_state *state)
608 int max_speed = xpcs_get_max_usxgmii_speed(state->lp_advertising);
610 state->pause = MLO_PAUSE_TX | MLO_PAUSE_RX;
611 state->speed = max_speed;
612 state->duplex = DUPLEX_FULL;
615 static int xpcs_get_max_xlgmii_speed(struct mdio_xpcs_args *xpcs,
616 struct phylink_link_state *state)
618 unsigned long *adv = state->advertising;
619 int speed = SPEED_UNKNOWN;
622 for_each_set_bit(bit, adv, __ETHTOOL_LINK_MODE_MASK_NBITS) {
623 int new_speed = SPEED_UNKNOWN;
626 case ETHTOOL_LINK_MODE_25000baseCR_Full_BIT:
627 case ETHTOOL_LINK_MODE_25000baseKR_Full_BIT:
628 case ETHTOOL_LINK_MODE_25000baseSR_Full_BIT:
629 new_speed = SPEED_25000;
631 case ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT:
632 case ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT:
633 case ETHTOOL_LINK_MODE_40000baseSR4_Full_BIT:
634 case ETHTOOL_LINK_MODE_40000baseLR4_Full_BIT:
635 new_speed = SPEED_40000;
637 case ETHTOOL_LINK_MODE_50000baseCR2_Full_BIT:
638 case ETHTOOL_LINK_MODE_50000baseKR2_Full_BIT:
639 case ETHTOOL_LINK_MODE_50000baseSR2_Full_BIT:
640 case ETHTOOL_LINK_MODE_50000baseKR_Full_BIT:
641 case ETHTOOL_LINK_MODE_50000baseSR_Full_BIT:
642 case ETHTOOL_LINK_MODE_50000baseCR_Full_BIT:
643 case ETHTOOL_LINK_MODE_50000baseLR_ER_FR_Full_BIT:
644 case ETHTOOL_LINK_MODE_50000baseDR_Full_BIT:
645 new_speed = SPEED_50000;
647 case ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT:
648 case ETHTOOL_LINK_MODE_100000baseSR4_Full_BIT:
649 case ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT:
650 case ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT:
651 case ETHTOOL_LINK_MODE_100000baseKR2_Full_BIT:
652 case ETHTOOL_LINK_MODE_100000baseSR2_Full_BIT:
653 case ETHTOOL_LINK_MODE_100000baseCR2_Full_BIT:
654 case ETHTOOL_LINK_MODE_100000baseLR2_ER2_FR2_Full_BIT:
655 case ETHTOOL_LINK_MODE_100000baseDR2_Full_BIT:
656 new_speed = SPEED_100000;
662 if (new_speed > speed)
669 static void xpcs_resolve_pma(struct mdio_xpcs_args *xpcs,
670 struct phylink_link_state *state)
672 state->pause = MLO_PAUSE_TX | MLO_PAUSE_RX;
673 state->duplex = DUPLEX_FULL;
675 switch (state->interface) {
676 case PHY_INTERFACE_MODE_10GKR:
677 state->speed = SPEED_10000;
679 case PHY_INTERFACE_MODE_XLGMII:
680 state->speed = xpcs_get_max_xlgmii_speed(xpcs, state);
683 state->speed = SPEED_UNKNOWN;
688 static int xpcs_validate(struct mdio_xpcs_args *xpcs,
689 unsigned long *supported,
690 struct phylink_link_state *state)
692 __ETHTOOL_DECLARE_LINK_MODE_MASK(xpcs_supported);
693 const struct xpcs_compat *compat;
696 /* phylink expects us to report all supported modes with
697 * PHY_INTERFACE_MODE_NA, just don't limit the supported and
698 * advertising masks and exit.
700 if (state->interface == PHY_INTERFACE_MODE_NA)
703 bitmap_zero(xpcs_supported, __ETHTOOL_LINK_MODE_MASK_NBITS);
705 compat = xpcs_find_compat(xpcs->id, state->interface);
707 /* Populate the supported link modes for this
711 for (i = 0; compat->supported[i] != __ETHTOOL_LINK_MODE_MASK_NBITS; i++)
712 set_bit(compat->supported[i], xpcs_supported);
714 linkmode_and(supported, supported, xpcs_supported);
715 linkmode_and(state->advertising, state->advertising, xpcs_supported);
720 static int xpcs_config_eee(struct mdio_xpcs_args *xpcs, int mult_fact_100ns,
727 ret = DW_VR_MII_EEE_LTX_EN | DW_VR_MII_EEE_LRX_EN |
728 DW_VR_MII_EEE_TX_QUIET_EN | DW_VR_MII_EEE_RX_QUIET_EN |
729 DW_VR_MII_EEE_TX_EN_CTRL | DW_VR_MII_EEE_RX_EN_CTRL |
730 mult_fact_100ns << DW_VR_MII_EEE_MULT_FACT_100NS_SHIFT;
732 ret = xpcs_read(xpcs, MDIO_MMD_VEND2, DW_VR_MII_EEE_MCTRL0);
735 ret &= ~(DW_VR_MII_EEE_LTX_EN | DW_VR_MII_EEE_LRX_EN |
736 DW_VR_MII_EEE_TX_QUIET_EN | DW_VR_MII_EEE_RX_QUIET_EN |
737 DW_VR_MII_EEE_TX_EN_CTRL | DW_VR_MII_EEE_RX_EN_CTRL |
738 DW_VR_MII_EEE_MULT_FACT_100NS);
741 ret = xpcs_write(xpcs, MDIO_MMD_VEND2, DW_VR_MII_EEE_MCTRL0, ret);
745 ret = xpcs_read(xpcs, MDIO_MMD_VEND2, DW_VR_MII_EEE_MCTRL1);
749 ret |= DW_VR_MII_EEE_TRN_LPI;
750 return xpcs_write(xpcs, MDIO_MMD_VEND2, DW_VR_MII_EEE_MCTRL1, ret);
753 static int xpcs_config_aneg_c37_sgmii(struct mdio_xpcs_args *xpcs)
757 /* For AN for C37 SGMII mode, the settings are :-
758 * 1) VR_MII_AN_CTRL Bit(2:1)[PCS_MODE] = 10b (SGMII AN)
759 * 2) VR_MII_AN_CTRL Bit(3) [TX_CONFIG] = 0b (MAC side SGMII)
760 * DW xPCS used with DW EQoS MAC is always MAC side SGMII.
761 * 3) VR_MII_DIG_CTRL1 Bit(9) [MAC_AUTO_SW] = 1b (Automatic
762 * speed/duplex mode change by HW after SGMII AN complete)
764 * Note: Since it is MAC side SGMII, there is no need to set
765 * SR_MII_AN_ADV. MAC side SGMII receives AN Tx Config from
766 * PHY about the link state change after C28 AN is completed
767 * between PHY and Link Partner. There is also no need to
768 * trigger AN restart for MAC-side SGMII.
770 ret = xpcs_read(xpcs, MDIO_MMD_VEND2, DW_VR_MII_AN_CTRL);
774 ret &= ~(DW_VR_MII_PCS_MODE_MASK | DW_VR_MII_TX_CONFIG_MASK);
775 ret |= (DW_VR_MII_PCS_MODE_C37_SGMII <<
776 DW_VR_MII_AN_CTRL_PCS_MODE_SHIFT &
777 DW_VR_MII_PCS_MODE_MASK);
778 ret |= (DW_VR_MII_TX_CONFIG_MAC_SIDE_SGMII <<
779 DW_VR_MII_AN_CTRL_TX_CONFIG_SHIFT &
780 DW_VR_MII_TX_CONFIG_MASK);
781 ret = xpcs_write(xpcs, MDIO_MMD_VEND2, DW_VR_MII_AN_CTRL, ret);
785 ret = xpcs_read(xpcs, MDIO_MMD_VEND2, DW_VR_MII_DIG_CTRL1);
789 ret |= DW_VR_MII_DIG_CTRL1_MAC_AUTO_SW;
791 return xpcs_write(xpcs, MDIO_MMD_VEND2, DW_VR_MII_DIG_CTRL1, ret);
794 static int xpcs_config(struct mdio_xpcs_args *xpcs,
795 const struct phylink_link_state *state)
797 const struct xpcs_compat *compat;
800 compat = xpcs_find_compat(xpcs->id, state->interface);
804 switch (compat->an_mode) {
806 if (state->an_enabled) {
807 ret = xpcs_config_aneg_c73(xpcs, compat);
812 case DW_AN_C37_SGMII:
813 ret = xpcs_config_aneg_c37_sgmii(xpcs);
824 static int xpcs_get_state_c73(struct mdio_xpcs_args *xpcs,
825 struct phylink_link_state *state,
826 const struct xpcs_compat *compat)
830 /* Link needs to be read first ... */
831 state->link = xpcs_read_link_c73(xpcs, state->an_enabled) > 0 ? 1 : 0;
833 /* ... and then we check the faults. */
834 ret = xpcs_read_fault_c73(xpcs, state);
836 ret = xpcs_soft_reset(xpcs, compat);
842 return xpcs_config(xpcs, state);
845 if (state->an_enabled && xpcs_aneg_done_c73(xpcs, state, compat)) {
846 state->an_complete = true;
847 xpcs_read_lpa_c73(xpcs, state);
848 xpcs_resolve_lpa_c73(xpcs, state);
849 } else if (state->an_enabled) {
851 } else if (state->link) {
852 xpcs_resolve_pma(xpcs, state);
858 static int xpcs_get_state_c37_sgmii(struct mdio_xpcs_args *xpcs,
859 struct phylink_link_state *state)
863 /* Reset link_state */
865 state->speed = SPEED_UNKNOWN;
866 state->duplex = DUPLEX_UNKNOWN;
869 /* For C37 SGMII mode, we check DW_VR_MII_AN_INTR_STS for link
870 * status, speed and duplex.
872 ret = xpcs_read(xpcs, MDIO_MMD_VEND2, DW_VR_MII_AN_INTR_STS);
876 if (ret & DW_VR_MII_C37_ANSGM_SP_LNKSTS) {
881 speed_value = (ret & DW_VR_MII_AN_STS_C37_ANSGM_SP) >>
882 DW_VR_MII_AN_STS_C37_ANSGM_SP_SHIFT;
883 if (speed_value == DW_VR_MII_C37_ANSGM_SP_1000)
884 state->speed = SPEED_1000;
885 else if (speed_value == DW_VR_MII_C37_ANSGM_SP_100)
886 state->speed = SPEED_100;
888 state->speed = SPEED_10;
890 if (ret & DW_VR_MII_AN_STS_C37_ANSGM_FD)
891 state->duplex = DUPLEX_FULL;
893 state->duplex = DUPLEX_HALF;
899 static int xpcs_get_state(struct mdio_xpcs_args *xpcs,
900 struct phylink_link_state *state)
902 const struct xpcs_compat *compat;
905 compat = xpcs_find_compat(xpcs->id, state->interface);
909 switch (compat->an_mode) {
911 ret = xpcs_get_state_c73(xpcs, state, compat);
915 case DW_AN_C37_SGMII:
916 ret = xpcs_get_state_c37_sgmii(xpcs, state);
927 static int xpcs_link_up(struct mdio_xpcs_args *xpcs, int speed,
928 phy_interface_t interface)
930 if (interface == PHY_INTERFACE_MODE_USXGMII)
931 return xpcs_config_usxgmii(xpcs, speed);
936 static u32 xpcs_get_id(struct mdio_xpcs_args *xpcs)
941 /* First, search C73 PCS using PCS MMD */
942 ret = xpcs_read(xpcs, MDIO_MMD_PCS, MII_PHYSID1);
948 ret = xpcs_read(xpcs, MDIO_MMD_PCS, MII_PHYSID2);
952 /* If Device IDs are not all zeros, we found C73 AN-type device */
956 /* Next, search C37 PCS using Vendor-Specific MII MMD */
957 ret = xpcs_read(xpcs, MDIO_MMD_VEND2, MII_PHYSID1);
963 ret = xpcs_read(xpcs, MDIO_MMD_VEND2, MII_PHYSID2);
967 /* If Device IDs are not all zeros, we found C37 AN-type device */
974 static const struct xpcs_compat synopsys_xpcs_compat[DW_XPCS_INTERFACE_MAX] = {
975 [DW_XPCS_USXGMII] = {
976 .supported = xpcs_usxgmii_features,
977 .interface = xpcs_usxgmii_interfaces,
978 .num_interfaces = ARRAY_SIZE(xpcs_usxgmii_interfaces),
979 .an_mode = DW_AN_C73,
982 .supported = xpcs_10gkr_features,
983 .interface = xpcs_10gkr_interfaces,
984 .num_interfaces = ARRAY_SIZE(xpcs_10gkr_interfaces),
985 .an_mode = DW_AN_C73,
988 .supported = xpcs_xlgmii_features,
989 .interface = xpcs_xlgmii_interfaces,
990 .num_interfaces = ARRAY_SIZE(xpcs_xlgmii_interfaces),
991 .an_mode = DW_AN_C73,
994 .supported = xpcs_sgmii_features,
995 .interface = xpcs_sgmii_interfaces,
996 .num_interfaces = ARRAY_SIZE(xpcs_sgmii_interfaces),
997 .an_mode = DW_AN_C37_SGMII,
1001 static const struct xpcs_id xpcs_id_list[] = {
1003 .id = SYNOPSYS_XPCS_ID,
1004 .mask = SYNOPSYS_XPCS_MASK,
1005 .compat = synopsys_xpcs_compat,
1009 static int xpcs_probe(struct mdio_xpcs_args *xpcs, phy_interface_t interface)
1011 u32 xpcs_id = xpcs_get_id(xpcs);
1014 for (i = 0; i < ARRAY_SIZE(xpcs_id_list); i++) {
1015 const struct xpcs_id *entry = &xpcs_id_list[i];
1016 const struct xpcs_compat *compat;
1018 if ((xpcs_id & entry->mask) != entry->id)
1023 compat = xpcs_find_compat(entry, interface);
1027 return xpcs_soft_reset(xpcs, compat);
1033 static struct mdio_xpcs_ops xpcs_ops = {
1034 .validate = xpcs_validate,
1035 .config = xpcs_config,
1036 .get_state = xpcs_get_state,
1037 .link_up = xpcs_link_up,
1038 .probe = xpcs_probe,
1039 .config_eee = xpcs_config_eee,
1042 struct mdio_xpcs_ops *mdio_xpcs_get_ops(void)
1046 EXPORT_SYMBOL_GPL(mdio_xpcs_get_ops);
1048 MODULE_LICENSE("GPL v2");