1 // SPDX-License-Identifier: GPL-2.0+
3 * Core PHY library, taken from phy.c
5 #include <linux/export.h>
10 * phy_speed_to_str - Return a string representing the PHY link speed
12 * @speed: Speed of the link
14 const char *phy_speed_to_str(int speed)
16 BUILD_BUG_ON_MSG(__ETHTOOL_LINK_MODE_MASK_NBITS != 103,
17 "Enum ethtool_link_mode_bit_indices and phylib are out of sync. "
18 "If a speed or mode has been added please update phy_speed_to_str "
19 "and the PHY settings array.\n");
57 return "Unsupported (update phy-core.c)";
60 EXPORT_SYMBOL_GPL(phy_speed_to_str);
63 * phy_duplex_to_str - Return string describing the duplex
65 * @duplex: Duplex setting to describe
67 const char *phy_duplex_to_str(unsigned int duplex)
69 if (duplex == DUPLEX_HALF)
71 if (duplex == DUPLEX_FULL)
73 if (duplex == DUPLEX_UNKNOWN)
75 return "Unsupported (update phy-core.c)";
77 EXPORT_SYMBOL_GPL(phy_duplex_to_str);
80 * phy_rate_matching_to_str - Return a string describing the rate matching
82 * @rate_matching: Type of rate matching to describe
84 const char *phy_rate_matching_to_str(int rate_matching)
86 switch (rate_matching) {
89 case RATE_MATCH_PAUSE:
93 case RATE_MATCH_OPEN_LOOP:
96 return "Unsupported (update phy-core.c)";
98 EXPORT_SYMBOL_GPL(phy_rate_matching_to_str);
101 * phy_interface_num_ports - Return the number of links that can be carried by
102 * a given MAC-PHY physical link. Returns 0 if this is
103 * unknown, the number of links else.
105 * @interface: The interface mode we want to get the number of ports
107 int phy_interface_num_ports(phy_interface_t interface)
110 case PHY_INTERFACE_MODE_NA:
112 case PHY_INTERFACE_MODE_INTERNAL:
113 case PHY_INTERFACE_MODE_MII:
114 case PHY_INTERFACE_MODE_GMII:
115 case PHY_INTERFACE_MODE_TBI:
116 case PHY_INTERFACE_MODE_REVMII:
117 case PHY_INTERFACE_MODE_RMII:
118 case PHY_INTERFACE_MODE_REVRMII:
119 case PHY_INTERFACE_MODE_RGMII:
120 case PHY_INTERFACE_MODE_RGMII_ID:
121 case PHY_INTERFACE_MODE_RGMII_RXID:
122 case PHY_INTERFACE_MODE_RGMII_TXID:
123 case PHY_INTERFACE_MODE_RTBI:
124 case PHY_INTERFACE_MODE_XGMII:
125 case PHY_INTERFACE_MODE_XLGMII:
126 case PHY_INTERFACE_MODE_MOCA:
127 case PHY_INTERFACE_MODE_TRGMII:
128 case PHY_INTERFACE_MODE_USXGMII:
129 case PHY_INTERFACE_MODE_SGMII:
130 case PHY_INTERFACE_MODE_SMII:
131 case PHY_INTERFACE_MODE_1000BASEX:
132 case PHY_INTERFACE_MODE_2500BASEX:
133 case PHY_INTERFACE_MODE_5GBASER:
134 case PHY_INTERFACE_MODE_10GBASER:
135 case PHY_INTERFACE_MODE_25GBASER:
136 case PHY_INTERFACE_MODE_10GKR:
137 case PHY_INTERFACE_MODE_100BASEX:
138 case PHY_INTERFACE_MODE_RXAUI:
139 case PHY_INTERFACE_MODE_XAUI:
140 case PHY_INTERFACE_MODE_1000BASEKX:
142 case PHY_INTERFACE_MODE_QSGMII:
143 case PHY_INTERFACE_MODE_QUSGMII:
144 case PHY_INTERFACE_MODE_10G_QXGMII:
146 case PHY_INTERFACE_MODE_PSGMII:
148 case PHY_INTERFACE_MODE_MAX:
149 WARN_ONCE(1, "PHY_INTERFACE_MODE_MAX isn't a valid interface mode");
154 EXPORT_SYMBOL_GPL(phy_interface_num_ports);
156 /* A mapping of all SUPPORTED settings to speed/duplex. This table
157 * must be grouped by speed and sorted in descending match priority
158 * - iow, descending speed.
161 #define PHY_SETTING(s, d, b) { .speed = SPEED_ ## s, .duplex = DUPLEX_ ## d, \
162 .bit = ETHTOOL_LINK_MODE_ ## b ## _BIT}
164 static const struct phy_setting settings[] = {
166 PHY_SETTING( 800000, FULL, 800000baseCR8_Full ),
167 PHY_SETTING( 800000, FULL, 800000baseKR8_Full ),
168 PHY_SETTING( 800000, FULL, 800000baseDR8_Full ),
169 PHY_SETTING( 800000, FULL, 800000baseDR8_2_Full ),
170 PHY_SETTING( 800000, FULL, 800000baseSR8_Full ),
171 PHY_SETTING( 800000, FULL, 800000baseVR8_Full ),
173 PHY_SETTING( 400000, FULL, 400000baseCR8_Full ),
174 PHY_SETTING( 400000, FULL, 400000baseKR8_Full ),
175 PHY_SETTING( 400000, FULL, 400000baseLR8_ER8_FR8_Full ),
176 PHY_SETTING( 400000, FULL, 400000baseDR8_Full ),
177 PHY_SETTING( 400000, FULL, 400000baseSR8_Full ),
178 PHY_SETTING( 400000, FULL, 400000baseCR4_Full ),
179 PHY_SETTING( 400000, FULL, 400000baseKR4_Full ),
180 PHY_SETTING( 400000, FULL, 400000baseLR4_ER4_FR4_Full ),
181 PHY_SETTING( 400000, FULL, 400000baseDR4_Full ),
182 PHY_SETTING( 400000, FULL, 400000baseSR4_Full ),
184 PHY_SETTING( 200000, FULL, 200000baseCR4_Full ),
185 PHY_SETTING( 200000, FULL, 200000baseKR4_Full ),
186 PHY_SETTING( 200000, FULL, 200000baseLR4_ER4_FR4_Full ),
187 PHY_SETTING( 200000, FULL, 200000baseDR4_Full ),
188 PHY_SETTING( 200000, FULL, 200000baseSR4_Full ),
189 PHY_SETTING( 200000, FULL, 200000baseCR2_Full ),
190 PHY_SETTING( 200000, FULL, 200000baseKR2_Full ),
191 PHY_SETTING( 200000, FULL, 200000baseLR2_ER2_FR2_Full ),
192 PHY_SETTING( 200000, FULL, 200000baseDR2_Full ),
193 PHY_SETTING( 200000, FULL, 200000baseSR2_Full ),
195 PHY_SETTING( 100000, FULL, 100000baseCR4_Full ),
196 PHY_SETTING( 100000, FULL, 100000baseKR4_Full ),
197 PHY_SETTING( 100000, FULL, 100000baseLR4_ER4_Full ),
198 PHY_SETTING( 100000, FULL, 100000baseSR4_Full ),
199 PHY_SETTING( 100000, FULL, 100000baseCR2_Full ),
200 PHY_SETTING( 100000, FULL, 100000baseKR2_Full ),
201 PHY_SETTING( 100000, FULL, 100000baseLR2_ER2_FR2_Full ),
202 PHY_SETTING( 100000, FULL, 100000baseDR2_Full ),
203 PHY_SETTING( 100000, FULL, 100000baseSR2_Full ),
204 PHY_SETTING( 100000, FULL, 100000baseCR_Full ),
205 PHY_SETTING( 100000, FULL, 100000baseKR_Full ),
206 PHY_SETTING( 100000, FULL, 100000baseLR_ER_FR_Full ),
207 PHY_SETTING( 100000, FULL, 100000baseDR_Full ),
208 PHY_SETTING( 100000, FULL, 100000baseSR_Full ),
210 PHY_SETTING( 56000, FULL, 56000baseCR4_Full ),
211 PHY_SETTING( 56000, FULL, 56000baseKR4_Full ),
212 PHY_SETTING( 56000, FULL, 56000baseLR4_Full ),
213 PHY_SETTING( 56000, FULL, 56000baseSR4_Full ),
215 PHY_SETTING( 50000, FULL, 50000baseCR2_Full ),
216 PHY_SETTING( 50000, FULL, 50000baseKR2_Full ),
217 PHY_SETTING( 50000, FULL, 50000baseSR2_Full ),
218 PHY_SETTING( 50000, FULL, 50000baseCR_Full ),
219 PHY_SETTING( 50000, FULL, 50000baseKR_Full ),
220 PHY_SETTING( 50000, FULL, 50000baseLR_ER_FR_Full ),
221 PHY_SETTING( 50000, FULL, 50000baseDR_Full ),
222 PHY_SETTING( 50000, FULL, 50000baseSR_Full ),
224 PHY_SETTING( 40000, FULL, 40000baseCR4_Full ),
225 PHY_SETTING( 40000, FULL, 40000baseKR4_Full ),
226 PHY_SETTING( 40000, FULL, 40000baseLR4_Full ),
227 PHY_SETTING( 40000, FULL, 40000baseSR4_Full ),
229 PHY_SETTING( 25000, FULL, 25000baseCR_Full ),
230 PHY_SETTING( 25000, FULL, 25000baseKR_Full ),
231 PHY_SETTING( 25000, FULL, 25000baseSR_Full ),
233 PHY_SETTING( 20000, FULL, 20000baseKR2_Full ),
234 PHY_SETTING( 20000, FULL, 20000baseMLD2_Full ),
236 PHY_SETTING( 10000, FULL, 10000baseCR_Full ),
237 PHY_SETTING( 10000, FULL, 10000baseER_Full ),
238 PHY_SETTING( 10000, FULL, 10000baseKR_Full ),
239 PHY_SETTING( 10000, FULL, 10000baseKX4_Full ),
240 PHY_SETTING( 10000, FULL, 10000baseLR_Full ),
241 PHY_SETTING( 10000, FULL, 10000baseLRM_Full ),
242 PHY_SETTING( 10000, FULL, 10000baseR_FEC ),
243 PHY_SETTING( 10000, FULL, 10000baseSR_Full ),
244 PHY_SETTING( 10000, FULL, 10000baseT_Full ),
246 PHY_SETTING( 5000, FULL, 5000baseT_Full ),
248 PHY_SETTING( 2500, FULL, 2500baseT_Full ),
249 PHY_SETTING( 2500, FULL, 2500baseX_Full ),
251 PHY_SETTING( 1000, FULL, 1000baseT_Full ),
252 PHY_SETTING( 1000, HALF, 1000baseT_Half ),
253 PHY_SETTING( 1000, FULL, 1000baseT1_Full ),
254 PHY_SETTING( 1000, FULL, 1000baseX_Full ),
255 PHY_SETTING( 1000, FULL, 1000baseKX_Full ),
257 PHY_SETTING( 100, FULL, 100baseT_Full ),
258 PHY_SETTING( 100, FULL, 100baseT1_Full ),
259 PHY_SETTING( 100, HALF, 100baseT_Half ),
260 PHY_SETTING( 100, HALF, 100baseFX_Half ),
261 PHY_SETTING( 100, FULL, 100baseFX_Full ),
263 PHY_SETTING( 10, FULL, 10baseT_Full ),
264 PHY_SETTING( 10, HALF, 10baseT_Half ),
265 PHY_SETTING( 10, FULL, 10baseT1L_Full ),
266 PHY_SETTING( 10, FULL, 10baseT1S_Full ),
267 PHY_SETTING( 10, HALF, 10baseT1S_Half ),
268 PHY_SETTING( 10, HALF, 10baseT1S_P2MP_Half ),
269 PHY_SETTING( 10, FULL, 10baseT1BRR_Full ),
274 * phy_lookup_setting - lookup a PHY setting
275 * @speed: speed to match
276 * @duplex: duplex to match
277 * @mask: allowed link modes
278 * @exact: an exact match is required
280 * Search the settings array for a setting that matches the speed and
281 * duplex, and which is supported.
283 * If @exact is unset, either an exact match or %NULL for no match will
286 * If @exact is set, an exact match, the fastest supported setting at
287 * or below the specified speed, the slowest supported setting, or if
288 * they all fail, %NULL will be returned.
290 const struct phy_setting *
291 phy_lookup_setting(int speed, int duplex, const unsigned long *mask, bool exact)
293 const struct phy_setting *p, *match = NULL, *last = NULL;
296 for (i = 0, p = settings; i < ARRAY_SIZE(settings); i++, p++) {
297 if (p->bit < __ETHTOOL_LINK_MODE_MASK_NBITS &&
298 test_bit(p->bit, mask)) {
300 if (p->speed == speed && p->duplex == duplex) {
301 /* Exact match for speed and duplex */
305 if (!match && p->speed <= speed)
309 if (p->speed < speed)
315 if (!match && !exact)
320 EXPORT_SYMBOL_GPL(phy_lookup_setting);
322 size_t phy_speeds(unsigned int *speeds, size_t size,
328 for (i = 0, count = 0; i < ARRAY_SIZE(settings) && count < size; i++)
329 if (settings[i].bit < __ETHTOOL_LINK_MODE_MASK_NBITS &&
330 test_bit(settings[i].bit, mask) &&
331 (count == 0 || speeds[count - 1] != settings[i].speed))
332 speeds[count++] = settings[i].speed;
337 static void __set_linkmode_max_speed(u32 max_speed, unsigned long *addr)
339 const struct phy_setting *p;
342 for (i = 0, p = settings; i < ARRAY_SIZE(settings); i++, p++) {
343 if (p->speed > max_speed)
344 linkmode_clear_bit(p->bit, addr);
350 static void __set_phy_supported(struct phy_device *phydev, u32 max_speed)
352 __set_linkmode_max_speed(max_speed, phydev->supported);
356 * phy_set_max_speed - Set the maximum speed the PHY should support
358 * @phydev: The phy_device struct
359 * @max_speed: Maximum speed
361 * The PHY might be more capable than the MAC. For example a Fast Ethernet
362 * is connected to a 1G PHY. This function allows the MAC to indicate its
363 * maximum speed, and so limit what the PHY will advertise.
365 void phy_set_max_speed(struct phy_device *phydev, u32 max_speed)
367 __set_phy_supported(phydev, max_speed);
369 phy_advertise_supported(phydev);
371 EXPORT_SYMBOL(phy_set_max_speed);
373 void of_set_phy_supported(struct phy_device *phydev)
375 struct device_node *node = phydev->mdio.dev.of_node;
378 if (!IS_ENABLED(CONFIG_OF_MDIO))
384 if (!of_property_read_u32(node, "max-speed", &max_speed))
385 __set_phy_supported(phydev, max_speed);
388 void of_set_phy_eee_broken(struct phy_device *phydev)
390 struct device_node *node = phydev->mdio.dev.of_node;
391 unsigned long *modes = phydev->eee_broken_modes;
393 if (!IS_ENABLED(CONFIG_OF_MDIO) || !node)
396 linkmode_zero(modes);
398 if (of_property_read_bool(node, "eee-broken-100tx"))
399 linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, modes);
400 if (of_property_read_bool(node, "eee-broken-1000t"))
401 linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, modes);
402 if (of_property_read_bool(node, "eee-broken-10gt"))
403 linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseT_Full_BIT, modes);
404 if (of_property_read_bool(node, "eee-broken-1000kx"))
405 linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseKX_Full_BIT, modes);
406 if (of_property_read_bool(node, "eee-broken-10gkx4"))
407 linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT, modes);
408 if (of_property_read_bool(node, "eee-broken-10gkr"))
409 linkmode_set_bit(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT, modes);
413 * of_set_phy_timing_role - Set the master/slave mode of the PHY
415 * @phydev: The phy_device struct
417 * Set master/slave configuration of the PHY based on the device tree.
419 void of_set_phy_timing_role(struct phy_device *phydev)
421 struct device_node *node = phydev->mdio.dev.of_node;
424 if (!IS_ENABLED(CONFIG_OF_MDIO))
430 if (of_property_read_string(node, "timing-role", &master))
433 if (strcmp(master, "forced-master") == 0)
434 phydev->master_slave_set = MASTER_SLAVE_CFG_MASTER_FORCE;
435 else if (strcmp(master, "forced-slave") == 0)
436 phydev->master_slave_set = MASTER_SLAVE_CFG_SLAVE_FORCE;
437 else if (strcmp(master, "preferred-master") == 0)
438 phydev->master_slave_set = MASTER_SLAVE_CFG_MASTER_PREFERRED;
439 else if (strcmp(master, "preferred-slave") == 0)
440 phydev->master_slave_set = MASTER_SLAVE_CFG_SLAVE_PREFERRED;
442 phydev_warn(phydev, "Unknown master-slave mode %s\n", master);
446 * phy_resolve_aneg_pause - Determine pause autoneg results
448 * @phydev: The phy_device struct
450 * Once autoneg has completed the local pause settings can be
451 * resolved. Determine if pause and asymmetric pause should be used
455 void phy_resolve_aneg_pause(struct phy_device *phydev)
457 if (phydev->duplex == DUPLEX_FULL) {
458 phydev->pause = linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT,
459 phydev->lp_advertising);
460 phydev->asym_pause = linkmode_test_bit(
461 ETHTOOL_LINK_MODE_Asym_Pause_BIT,
462 phydev->lp_advertising);
465 EXPORT_SYMBOL_GPL(phy_resolve_aneg_pause);
468 * phy_resolve_aneg_linkmode - resolve the advertisements into PHY settings
469 * @phydev: The phy_device struct
471 * Resolve our and the link partner advertisements into their corresponding
472 * speed and duplex. If full duplex was negotiated, extract the pause mode
473 * from the link partner mask.
475 void phy_resolve_aneg_linkmode(struct phy_device *phydev)
477 __ETHTOOL_DECLARE_LINK_MODE_MASK(common);
480 linkmode_and(common, phydev->lp_advertising, phydev->advertising);
482 for (i = 0; i < ARRAY_SIZE(settings); i++)
483 if (test_bit(settings[i].bit, common)) {
484 phydev->speed = settings[i].speed;
485 phydev->duplex = settings[i].duplex;
489 phy_resolve_aneg_pause(phydev);
491 EXPORT_SYMBOL_GPL(phy_resolve_aneg_linkmode);
494 * phy_check_downshift - check whether downshift occurred
495 * @phydev: The phy_device struct
497 * Check whether a downshift to a lower speed occurred. If this should be the
498 * case warn the user.
499 * Prerequisite for detecting downshift is that PHY driver implements the
500 * read_status callback and sets phydev->speed to the actual link speed.
502 void phy_check_downshift(struct phy_device *phydev)
504 __ETHTOOL_DECLARE_LINK_MODE_MASK(common);
505 int i, speed = SPEED_UNKNOWN;
507 phydev->downshifted_rate = 0;
509 if (phydev->autoneg == AUTONEG_DISABLE ||
510 phydev->speed == SPEED_UNKNOWN)
513 linkmode_and(common, phydev->lp_advertising, phydev->advertising);
515 for (i = 0; i < ARRAY_SIZE(settings); i++)
516 if (test_bit(settings[i].bit, common)) {
517 speed = settings[i].speed;
521 if (speed == SPEED_UNKNOWN || phydev->speed >= speed)
524 phydev_warn(phydev, "Downshift occurred from negotiated speed %s to actual speed %s, check cabling!\n",
525 phy_speed_to_str(speed), phy_speed_to_str(phydev->speed));
527 phydev->downshifted_rate = 1;
529 EXPORT_SYMBOL_GPL(phy_check_downshift);
531 static int phy_resolve_min_speed(struct phy_device *phydev, bool fdx_only)
533 __ETHTOOL_DECLARE_LINK_MODE_MASK(common);
534 int i = ARRAY_SIZE(settings);
536 linkmode_and(common, phydev->lp_advertising, phydev->advertising);
539 if (test_bit(settings[i].bit, common)) {
540 if (fdx_only && settings[i].duplex != DUPLEX_FULL)
542 return settings[i].speed;
546 return SPEED_UNKNOWN;
549 int phy_speed_down_core(struct phy_device *phydev)
551 int min_common_speed = phy_resolve_min_speed(phydev, true);
553 if (min_common_speed == SPEED_UNKNOWN)
556 __set_linkmode_max_speed(min_common_speed, phydev->advertising);
561 static void mmd_phy_indirect(struct mii_bus *bus, int phy_addr, int devad,
564 /* Write the desired MMD Devad */
565 __mdiobus_write(bus, phy_addr, MII_MMD_CTRL, devad);
567 /* Write the desired MMD register address */
568 __mdiobus_write(bus, phy_addr, MII_MMD_DATA, regnum);
570 /* Select the Function : DATA with no post increment */
571 __mdiobus_write(bus, phy_addr, MII_MMD_CTRL,
572 devad | MII_MMD_CTRL_NOINCR);
575 static int mmd_phy_read(struct mii_bus *bus, int phy_addr, bool is_c45,
576 int devad, u32 regnum)
579 return __mdiobus_c45_read(bus, phy_addr, devad, regnum);
581 mmd_phy_indirect(bus, phy_addr, devad, regnum);
582 /* Read the content of the MMD's selected register */
583 return __mdiobus_read(bus, phy_addr, MII_MMD_DATA);
586 static int mmd_phy_write(struct mii_bus *bus, int phy_addr, bool is_c45,
587 int devad, u32 regnum, u16 val)
590 return __mdiobus_c45_write(bus, phy_addr, devad, regnum, val);
592 mmd_phy_indirect(bus, phy_addr, devad, regnum);
593 /* Write the data into MMD's selected register */
594 return __mdiobus_write(bus, phy_addr, MII_MMD_DATA, val);
598 * __phy_read_mmd - Convenience function for reading a register
599 * from an MMD on a given PHY.
600 * @phydev: The phy_device struct
601 * @devad: The MMD to read from (0..31)
602 * @regnum: The register on the MMD to read (0..65535)
604 * Same rules as for __phy_read();
606 int __phy_read_mmd(struct phy_device *phydev, int devad, u32 regnum)
608 if (regnum > (u16)~0 || devad > 32)
611 if (phydev->drv && phydev->drv->read_mmd)
612 return phydev->drv->read_mmd(phydev, devad, regnum);
614 return mmd_phy_read(phydev->mdio.bus, phydev->mdio.addr,
615 phydev->is_c45, devad, regnum);
617 EXPORT_SYMBOL(__phy_read_mmd);
620 * phy_read_mmd - Convenience function for reading a register
621 * from an MMD on a given PHY.
622 * @phydev: The phy_device struct
623 * @devad: The MMD to read from
624 * @regnum: The register on the MMD to read
626 * Same rules as for phy_read();
628 int phy_read_mmd(struct phy_device *phydev, int devad, u32 regnum)
632 phy_lock_mdio_bus(phydev);
633 ret = __phy_read_mmd(phydev, devad, regnum);
634 phy_unlock_mdio_bus(phydev);
638 EXPORT_SYMBOL(phy_read_mmd);
641 * __phy_write_mmd - Convenience function for writing a register
642 * on an MMD on a given PHY.
643 * @phydev: The phy_device struct
644 * @devad: The MMD to read from
645 * @regnum: The register on the MMD to read
646 * @val: value to write to @regnum
648 * Same rules as for __phy_write();
650 int __phy_write_mmd(struct phy_device *phydev, int devad, u32 regnum, u16 val)
652 if (regnum > (u16)~0 || devad > 32)
655 if (phydev->drv && phydev->drv->write_mmd)
656 return phydev->drv->write_mmd(phydev, devad, regnum, val);
658 return mmd_phy_write(phydev->mdio.bus, phydev->mdio.addr,
659 phydev->is_c45, devad, regnum, val);
661 EXPORT_SYMBOL(__phy_write_mmd);
664 * phy_write_mmd - Convenience function for writing a register
665 * on an MMD on a given PHY.
666 * @phydev: The phy_device struct
667 * @devad: The MMD to read from
668 * @regnum: The register on the MMD to read
669 * @val: value to write to @regnum
671 * Same rules as for phy_write();
673 int phy_write_mmd(struct phy_device *phydev, int devad, u32 regnum, u16 val)
677 phy_lock_mdio_bus(phydev);
678 ret = __phy_write_mmd(phydev, devad, regnum, val);
679 phy_unlock_mdio_bus(phydev);
683 EXPORT_SYMBOL(phy_write_mmd);
686 * __phy_package_read_mmd - read MMD reg relative to PHY package base addr
687 * @phydev: The phy_device struct
688 * @addr_offset: The offset to be added to PHY package base_addr
689 * @devad: The MMD to read from
690 * @regnum: The register on the MMD to read
692 * Convenience helper for reading a register of an MMD on a given PHY
693 * using the PHY package base address. The base address is added to
694 * the addr_offset value.
696 * Same calling rules as for __phy_read();
698 * NOTE: It's assumed that the entire PHY package is either C22 or C45.
700 int __phy_package_read_mmd(struct phy_device *phydev,
701 unsigned int addr_offset, int devad,
704 int addr = phy_package_address(phydev, addr_offset);
709 if (regnum > (u16)~0 || devad > 32)
712 return mmd_phy_read(phydev->mdio.bus, addr, phydev->is_c45, devad,
715 EXPORT_SYMBOL(__phy_package_read_mmd);
718 * phy_package_read_mmd - read MMD reg relative to PHY package base addr
719 * @phydev: The phy_device struct
720 * @addr_offset: The offset to be added to PHY package base_addr
721 * @devad: The MMD to read from
722 * @regnum: The register on the MMD to read
724 * Convenience helper for reading a register of an MMD on a given PHY
725 * using the PHY package base address. The base address is added to
726 * the addr_offset value.
728 * Same calling rules as for phy_read();
730 * NOTE: It's assumed that the entire PHY package is either C22 or C45.
732 int phy_package_read_mmd(struct phy_device *phydev,
733 unsigned int addr_offset, int devad,
736 int addr = phy_package_address(phydev, addr_offset);
742 if (regnum > (u16)~0 || devad > 32)
745 phy_lock_mdio_bus(phydev);
746 val = mmd_phy_read(phydev->mdio.bus, addr, phydev->is_c45, devad,
748 phy_unlock_mdio_bus(phydev);
752 EXPORT_SYMBOL(phy_package_read_mmd);
755 * __phy_package_write_mmd - write MMD reg relative to PHY package base addr
756 * @phydev: The phy_device struct
757 * @addr_offset: The offset to be added to PHY package base_addr
758 * @devad: The MMD to write to
759 * @regnum: The register on the MMD to write
760 * @val: value to write to @regnum
762 * Convenience helper for writing a register of an MMD on a given PHY
763 * using the PHY package base address. The base address is added to
764 * the addr_offset value.
766 * Same calling rules as for __phy_write();
768 * NOTE: It's assumed that the entire PHY package is either C22 or C45.
770 int __phy_package_write_mmd(struct phy_device *phydev,
771 unsigned int addr_offset, int devad,
774 int addr = phy_package_address(phydev, addr_offset);
779 if (regnum > (u16)~0 || devad > 32)
782 return mmd_phy_write(phydev->mdio.bus, addr, phydev->is_c45, devad,
785 EXPORT_SYMBOL(__phy_package_write_mmd);
788 * phy_package_write_mmd - write MMD reg relative to PHY package base addr
789 * @phydev: The phy_device struct
790 * @addr_offset: The offset to be added to PHY package base_addr
791 * @devad: The MMD to write to
792 * @regnum: The register on the MMD to write
793 * @val: value to write to @regnum
795 * Convenience helper for writing a register of an MMD on a given PHY
796 * using the PHY package base address. The base address is added to
797 * the addr_offset value.
799 * Same calling rules as for phy_write();
801 * NOTE: It's assumed that the entire PHY package is either C22 or C45.
803 int phy_package_write_mmd(struct phy_device *phydev,
804 unsigned int addr_offset, int devad,
807 int addr = phy_package_address(phydev, addr_offset);
813 if (regnum > (u16)~0 || devad > 32)
816 phy_lock_mdio_bus(phydev);
817 ret = mmd_phy_write(phydev->mdio.bus, addr, phydev->is_c45, devad,
819 phy_unlock_mdio_bus(phydev);
823 EXPORT_SYMBOL(phy_package_write_mmd);
826 * phy_modify_changed - Function for modifying a PHY register
827 * @phydev: the phy_device struct
828 * @regnum: register number to modify
829 * @mask: bit mask of bits to clear
830 * @set: new value of bits set in mask to write to @regnum
832 * NOTE: MUST NOT be called from interrupt context,
833 * because the bus read/write functions may wait for an interrupt
834 * to conclude the operation.
836 * Returns negative errno, 0 if there was no change, and 1 in case of change
838 int phy_modify_changed(struct phy_device *phydev, u32 regnum, u16 mask, u16 set)
842 phy_lock_mdio_bus(phydev);
843 ret = __phy_modify_changed(phydev, regnum, mask, set);
844 phy_unlock_mdio_bus(phydev);
848 EXPORT_SYMBOL_GPL(phy_modify_changed);
851 * __phy_modify - Convenience function for modifying a PHY register
852 * @phydev: the phy_device struct
853 * @regnum: register number to modify
854 * @mask: bit mask of bits to clear
855 * @set: new value of bits set in mask to write to @regnum
857 * NOTE: MUST NOT be called from interrupt context,
858 * because the bus read/write functions may wait for an interrupt
859 * to conclude the operation.
861 int __phy_modify(struct phy_device *phydev, u32 regnum, u16 mask, u16 set)
865 ret = __phy_modify_changed(phydev, regnum, mask, set);
867 return ret < 0 ? ret : 0;
869 EXPORT_SYMBOL_GPL(__phy_modify);
872 * phy_modify - Convenience function for modifying a given PHY register
873 * @phydev: the phy_device struct
874 * @regnum: register number to write
875 * @mask: bit mask of bits to clear
876 * @set: new value of bits set in mask to write to @regnum
878 * NOTE: MUST NOT be called from interrupt context,
879 * because the bus read/write functions may wait for an interrupt
880 * to conclude the operation.
882 int phy_modify(struct phy_device *phydev, u32 regnum, u16 mask, u16 set)
886 phy_lock_mdio_bus(phydev);
887 ret = __phy_modify(phydev, regnum, mask, set);
888 phy_unlock_mdio_bus(phydev);
892 EXPORT_SYMBOL_GPL(phy_modify);
895 * __phy_modify_mmd_changed - Function for modifying a register on MMD
896 * @phydev: the phy_device struct
897 * @devad: the MMD containing register to modify
898 * @regnum: register number to modify
899 * @mask: bit mask of bits to clear
900 * @set: new value of bits set in mask to write to @regnum
902 * Unlocked helper function which allows a MMD register to be modified as
903 * new register value = (old register value & ~mask) | set
905 * Returns negative errno, 0 if there was no change, and 1 in case of change
907 int __phy_modify_mmd_changed(struct phy_device *phydev, int devad, u32 regnum,
912 ret = __phy_read_mmd(phydev, devad, regnum);
916 new = (ret & ~mask) | set;
920 ret = __phy_write_mmd(phydev, devad, regnum, new);
922 return ret < 0 ? ret : 1;
924 EXPORT_SYMBOL_GPL(__phy_modify_mmd_changed);
927 * phy_modify_mmd_changed - Function for modifying a register on MMD
928 * @phydev: the phy_device struct
929 * @devad: the MMD containing register to modify
930 * @regnum: register number to modify
931 * @mask: bit mask of bits to clear
932 * @set: new value of bits set in mask to write to @regnum
934 * NOTE: MUST NOT be called from interrupt context,
935 * because the bus read/write functions may wait for an interrupt
936 * to conclude the operation.
938 * Returns negative errno, 0 if there was no change, and 1 in case of change
940 int phy_modify_mmd_changed(struct phy_device *phydev, int devad, u32 regnum,
945 phy_lock_mdio_bus(phydev);
946 ret = __phy_modify_mmd_changed(phydev, devad, regnum, mask, set);
947 phy_unlock_mdio_bus(phydev);
951 EXPORT_SYMBOL_GPL(phy_modify_mmd_changed);
954 * __phy_modify_mmd - Convenience function for modifying a register on MMD
955 * @phydev: the phy_device struct
956 * @devad: the MMD containing register to modify
957 * @regnum: register number to modify
958 * @mask: bit mask of bits to clear
959 * @set: new value of bits set in mask to write to @regnum
961 * NOTE: MUST NOT be called from interrupt context,
962 * because the bus read/write functions may wait for an interrupt
963 * to conclude the operation.
965 int __phy_modify_mmd(struct phy_device *phydev, int devad, u32 regnum,
970 ret = __phy_modify_mmd_changed(phydev, devad, regnum, mask, set);
972 return ret < 0 ? ret : 0;
974 EXPORT_SYMBOL_GPL(__phy_modify_mmd);
977 * phy_modify_mmd - Convenience function for modifying a register on MMD
978 * @phydev: the phy_device struct
979 * @devad: the MMD containing register to modify
980 * @regnum: register number to modify
981 * @mask: bit mask of bits to clear
982 * @set: new value of bits set in mask to write to @regnum
984 * NOTE: MUST NOT be called from interrupt context,
985 * because the bus read/write functions may wait for an interrupt
986 * to conclude the operation.
988 int phy_modify_mmd(struct phy_device *phydev, int devad, u32 regnum,
993 phy_lock_mdio_bus(phydev);
994 ret = __phy_modify_mmd(phydev, devad, regnum, mask, set);
995 phy_unlock_mdio_bus(phydev);
999 EXPORT_SYMBOL_GPL(phy_modify_mmd);
1001 static int __phy_read_page(struct phy_device *phydev)
1003 if (WARN_ONCE(!phydev->drv->read_page, "read_page callback not available, PHY driver not loaded?\n"))
1006 return phydev->drv->read_page(phydev);
1009 static int __phy_write_page(struct phy_device *phydev, int page)
1011 if (WARN_ONCE(!phydev->drv->write_page, "write_page callback not available, PHY driver not loaded?\n"))
1014 return phydev->drv->write_page(phydev, page);
1018 * phy_save_page() - take the bus lock and save the current page
1019 * @phydev: a pointer to a &struct phy_device
1021 * Take the MDIO bus lock, and return the current page number. On error,
1022 * returns a negative errno. phy_restore_page() must always be called
1023 * after this, irrespective of success or failure of this call.
1025 int phy_save_page(struct phy_device *phydev)
1027 phy_lock_mdio_bus(phydev);
1028 return __phy_read_page(phydev);
1030 EXPORT_SYMBOL_GPL(phy_save_page);
1033 * phy_select_page() - take the bus lock, save the current page, and set a page
1034 * @phydev: a pointer to a &struct phy_device
1035 * @page: desired page
1037 * Take the MDIO bus lock to protect against concurrent access, save the
1038 * current PHY page, and set the current page. On error, returns a
1039 * negative errno, otherwise returns the previous page number.
1040 * phy_restore_page() must always be called after this, irrespective
1041 * of success or failure of this call.
1043 int phy_select_page(struct phy_device *phydev, int page)
1047 oldpage = ret = phy_save_page(phydev);
1051 if (oldpage != page) {
1052 ret = __phy_write_page(phydev, page);
1059 EXPORT_SYMBOL_GPL(phy_select_page);
1062 * phy_restore_page() - restore the page register and release the bus lock
1063 * @phydev: a pointer to a &struct phy_device
1064 * @oldpage: the old page, return value from phy_save_page() or phy_select_page()
1065 * @ret: operation's return code
1067 * Release the MDIO bus lock, restoring @oldpage if it is a valid page.
1068 * This function propagates the earliest error code from the group of
1072 * @oldpage if it was a negative value, otherwise
1073 * @ret if it was a negative errno value, otherwise
1074 * phy_write_page()'s negative value if it were in error, otherwise
1077 int phy_restore_page(struct phy_device *phydev, int oldpage, int ret)
1082 r = __phy_write_page(phydev, oldpage);
1084 /* Propagate the operation return code if the page write
1087 if (ret >= 0 && r < 0)
1090 /* Propagate the phy page selection error code */
1094 phy_unlock_mdio_bus(phydev);
1098 EXPORT_SYMBOL_GPL(phy_restore_page);
1101 * phy_read_paged() - Convenience function for reading a paged register
1102 * @phydev: a pointer to a &struct phy_device
1103 * @page: the page for the phy
1104 * @regnum: register number
1106 * Same rules as for phy_read().
1108 int phy_read_paged(struct phy_device *phydev, int page, u32 regnum)
1110 int ret = 0, oldpage;
1112 oldpage = phy_select_page(phydev, page);
1114 ret = __phy_read(phydev, regnum);
1116 return phy_restore_page(phydev, oldpage, ret);
1118 EXPORT_SYMBOL(phy_read_paged);
1121 * phy_write_paged() - Convenience function for writing a paged register
1122 * @phydev: a pointer to a &struct phy_device
1123 * @page: the page for the phy
1124 * @regnum: register number
1125 * @val: value to write
1127 * Same rules as for phy_write().
1129 int phy_write_paged(struct phy_device *phydev, int page, u32 regnum, u16 val)
1131 int ret = 0, oldpage;
1133 oldpage = phy_select_page(phydev, page);
1135 ret = __phy_write(phydev, regnum, val);
1137 return phy_restore_page(phydev, oldpage, ret);
1139 EXPORT_SYMBOL(phy_write_paged);
1142 * phy_modify_paged_changed() - Function for modifying a paged register
1143 * @phydev: a pointer to a &struct phy_device
1144 * @page: the page for the phy
1145 * @regnum: register number
1146 * @mask: bit mask of bits to clear
1147 * @set: bit mask of bits to set
1149 * Returns negative errno, 0 if there was no change, and 1 in case of change
1151 int phy_modify_paged_changed(struct phy_device *phydev, int page, u32 regnum,
1154 int ret = 0, oldpage;
1156 oldpage = phy_select_page(phydev, page);
1158 ret = __phy_modify_changed(phydev, regnum, mask, set);
1160 return phy_restore_page(phydev, oldpage, ret);
1162 EXPORT_SYMBOL(phy_modify_paged_changed);
1165 * phy_modify_paged() - Convenience function for modifying a paged register
1166 * @phydev: a pointer to a &struct phy_device
1167 * @page: the page for the phy
1168 * @regnum: register number
1169 * @mask: bit mask of bits to clear
1170 * @set: bit mask of bits to set
1172 * Same rules as for phy_read() and phy_write().
1174 int phy_modify_paged(struct phy_device *phydev, int page, u32 regnum,
1177 int ret = phy_modify_paged_changed(phydev, page, regnum, mask, set);
1179 return ret < 0 ? ret : 0;
1181 EXPORT_SYMBOL(phy_modify_paged);