]>
Commit | Line | Data |
---|---|---|
d2912cb1 | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
52c94dfa BH |
2 | /* |
3 | * linux/mdio.h: definitions for MDIO (clause 45) transceivers | |
4 | * Copyright 2006-2009 Solarflare Communications Inc. | |
52c94dfa | 5 | */ |
52c94dfa BH |
6 | #ifndef __LINUX_MDIO_H__ |
7 | #define __LINUX_MDIO_H__ | |
8 | ||
607ca46e | 9 | #include <uapi/linux/mdio.h> |
648ea013 | 10 | #include <linux/mod_devicetable.h> |
52c94dfa | 11 | |
90ce665c RK |
12 | /* Or MII_ADDR_C45 into regnum for read/write on mii_bus to enable the 21 bit |
13 | * IEEE 802.3ae clause 45 addressing mode used by 10GIGE phy chips. | |
14 | */ | |
15 | #define MII_ADDR_C45 (1<<30) | |
16 | #define MII_DEVADDR_C45_SHIFT 16 | |
17 | #define MII_REGADDR_C45_MASK GENMASK(15, 0) | |
18 | ||
bafbdd52 | 19 | struct gpio_desc; |
bac83c65 | 20 | struct mii_bus; |
33374098 | 21 | struct reset_control; |
9c717758 | 22 | |
9a6f2b01 AL |
23 | /* Multiple levels of nesting are possible. However typically this is |
24 | * limited to nested DSA like layer, a MUX layer, and the normal | |
25 | * user. Instead of trying to handle the general case, just define | |
26 | * these cases. | |
27 | */ | |
28 | enum mdio_mutex_lock_class { | |
29 | MDIO_MUTEX_NORMAL, | |
30 | MDIO_MUTEX_MUX, | |
31 | MDIO_MUTEX_NESTED, | |
32 | }; | |
33 | ||
e5a03bfd AL |
34 | struct mdio_device { |
35 | struct device dev; | |
a9049e0c | 36 | |
e5a03bfd | 37 | struct mii_bus *bus; |
648ea013 | 38 | char modalias[MDIO_NAME_SIZE]; |
711fdba3 | 39 | |
e76a4957 | 40 | int (*bus_match)(struct device *dev, struct device_driver *drv); |
711fdba3 AL |
41 | void (*device_free)(struct mdio_device *mdiodev); |
42 | void (*device_remove)(struct mdio_device *mdiodev); | |
43 | ||
e5a03bfd AL |
44 | /* Bus address of the MDIO device (0-31) */ |
45 | int addr; | |
7f854420 | 46 | int flags; |
6110ed2d | 47 | struct gpio_desc *reset_gpio; |
71dd6c0d | 48 | struct reset_control *reset_ctrl; |
04f629f7 RL |
49 | unsigned int reset_assert_delay; |
50 | unsigned int reset_deassert_delay; | |
e5a03bfd | 51 | }; |
7eab14de AL |
52 | |
53 | static inline struct mdio_device *to_mdio_device(const struct device *dev) | |
54 | { | |
55 | return container_of(dev, struct mdio_device, dev); | |
56 | } | |
e5a03bfd | 57 | |
a9049e0c AL |
58 | /* struct mdio_driver_common: Common to all MDIO drivers */ |
59 | struct mdio_driver_common { | |
60 | struct device_driver driver; | |
61 | int flags; | |
62 | }; | |
7f854420 | 63 | #define MDIO_DEVICE_FLAG_PHY 1 |
7eab14de AL |
64 | |
65 | static inline struct mdio_driver_common * | |
66 | to_mdio_common_driver(const struct device_driver *driver) | |
67 | { | |
68 | return container_of(driver, struct mdio_driver_common, driver); | |
69 | } | |
a9049e0c AL |
70 | |
71 | /* struct mdio_driver: Generic MDIO driver */ | |
72 | struct mdio_driver { | |
73 | struct mdio_driver_common mdiodrv; | |
74 | ||
75 | /* | |
76 | * Called during discovery. Used to set | |
77 | * up device-specific structures, if any | |
78 | */ | |
79 | int (*probe)(struct mdio_device *mdiodev); | |
80 | ||
81 | /* Clears up any memory if needed */ | |
82 | void (*remove)(struct mdio_device *mdiodev); | |
83 | }; | |
7eab14de AL |
84 | |
85 | static inline struct mdio_driver * | |
86 | to_mdio_driver(const struct device_driver *driver) | |
87 | { | |
88 | return container_of(to_mdio_common_driver(driver), struct mdio_driver, | |
89 | mdiodrv); | |
90 | } | |
a9049e0c | 91 | |
36b1a2fc HK |
92 | /* device driver data */ |
93 | static inline void mdiodev_set_drvdata(struct mdio_device *mdio, void *data) | |
94 | { | |
95 | dev_set_drvdata(&mdio->dev, data); | |
96 | } | |
97 | ||
98 | static inline void *mdiodev_get_drvdata(struct mdio_device *mdio) | |
99 | { | |
100 | return dev_get_drvdata(&mdio->dev); | |
101 | } | |
102 | ||
a9049e0c AL |
103 | void mdio_device_free(struct mdio_device *mdiodev); |
104 | struct mdio_device *mdio_device_create(struct mii_bus *bus, int addr); | |
105 | int mdio_device_register(struct mdio_device *mdiodev); | |
106 | void mdio_device_remove(struct mdio_device *mdiodev); | |
bafbdd52 | 107 | void mdio_device_reset(struct mdio_device *mdiodev, int value); |
a9049e0c AL |
108 | int mdio_driver_register(struct mdio_driver *drv); |
109 | void mdio_driver_unregister(struct mdio_driver *drv); | |
648ea013 | 110 | int mdio_device_bus_match(struct device *dev, struct device_driver *drv); |
7f854420 | 111 | |
52c94dfa BH |
112 | static inline bool mdio_phy_id_is_c45(int phy_id) |
113 | { | |
114 | return (phy_id & MDIO_PHY_ID_C45) && !(phy_id & ~MDIO_PHY_ID_C45_MASK); | |
115 | } | |
116 | ||
117 | static inline __u16 mdio_phy_id_prtad(int phy_id) | |
118 | { | |
119 | return (phy_id & MDIO_PHY_ID_PRTAD) >> 5; | |
120 | } | |
121 | ||
122 | static inline __u16 mdio_phy_id_devad(int phy_id) | |
123 | { | |
124 | return phy_id & MDIO_PHY_ID_DEVAD; | |
125 | } | |
126 | ||
1b1c2e95 BH |
127 | /** |
128 | * struct mdio_if_info - Ethernet controller MDIO interface | |
129 | * @prtad: PRTAD of the PHY (%MDIO_PRTAD_NONE if not present/unknown) | |
130 | * @mmds: Mask of MMDs expected to be present in the PHY. This must be | |
131 | * non-zero unless @prtad = %MDIO_PRTAD_NONE. | |
132 | * @mode_support: MDIO modes supported. If %MDIO_SUPPORTS_C22 is set then | |
133 | * MII register access will be passed through with @devad = | |
134 | * %MDIO_DEVAD_NONE. If %MDIO_EMULATE_C22 is set then access to | |
135 | * commonly used clause 22 registers will be translated into | |
136 | * clause 45 registers. | |
137 | * @dev: Net device structure | |
138 | * @mdio_read: Register read function; returns value or negative error code | |
139 | * @mdio_write: Register write function; returns 0 or negative error code | |
140 | */ | |
141 | struct mdio_if_info { | |
142 | int prtad; | |
23428e6b | 143 | u32 mmds; |
1b1c2e95 BH |
144 | unsigned mode_support; |
145 | ||
146 | struct net_device *dev; | |
147 | int (*mdio_read)(struct net_device *dev, int prtad, int devad, | |
148 | u16 addr); | |
149 | int (*mdio_write)(struct net_device *dev, int prtad, int devad, | |
150 | u16 addr, u16 val); | |
151 | }; | |
152 | ||
153 | #define MDIO_PRTAD_NONE (-1) | |
154 | #define MDIO_DEVAD_NONE (-1) | |
9c717758 BH |
155 | #define MDIO_SUPPORTS_C22 1 |
156 | #define MDIO_SUPPORTS_C45 2 | |
1b1c2e95 BH |
157 | #define MDIO_EMULATE_C22 4 |
158 | ||
159 | struct ethtool_cmd; | |
160 | struct ethtool_pauseparam; | |
161 | extern int mdio45_probe(struct mdio_if_info *mdio, int prtad); | |
162 | extern int mdio_set_flag(const struct mdio_if_info *mdio, | |
163 | int prtad, int devad, u16 addr, int mask, | |
164 | bool sense); | |
165 | extern int mdio45_links_ok(const struct mdio_if_info *mdio, u32 mmds); | |
166 | extern int mdio45_nway_restart(const struct mdio_if_info *mdio); | |
167 | extern void mdio45_ethtool_gset_npage(const struct mdio_if_info *mdio, | |
168 | struct ethtool_cmd *ecmd, | |
169 | u32 npage_adv, u32 npage_lpa); | |
8e4881aa PR |
170 | extern void |
171 | mdio45_ethtool_ksettings_get_npage(const struct mdio_if_info *mdio, | |
172 | struct ethtool_link_ksettings *cmd, | |
173 | u32 npage_adv, u32 npage_lpa); | |
1b1c2e95 BH |
174 | |
175 | /** | |
176 | * mdio45_ethtool_gset - get settings for ETHTOOL_GSET | |
177 | * @mdio: MDIO interface | |
178 | * @ecmd: Ethtool request structure | |
179 | * | |
180 | * Since the CSRs for auto-negotiation using next pages are not fully | |
181 | * standardised, this function does not attempt to decode them. Use | |
182 | * mdio45_ethtool_gset_npage() to specify advertisement bits from next | |
183 | * pages. | |
184 | */ | |
185 | static inline void mdio45_ethtool_gset(const struct mdio_if_info *mdio, | |
186 | struct ethtool_cmd *ecmd) | |
187 | { | |
188 | mdio45_ethtool_gset_npage(mdio, ecmd, 0, 0); | |
189 | } | |
190 | ||
8e4881aa PR |
191 | /** |
192 | * mdio45_ethtool_ksettings_get - get settings for ETHTOOL_GLINKSETTINGS | |
193 | * @mdio: MDIO interface | |
194 | * @cmd: Ethtool request structure | |
195 | * | |
196 | * Since the CSRs for auto-negotiation using next pages are not fully | |
197 | * standardised, this function does not attempt to decode them. Use | |
198 | * mdio45_ethtool_ksettings_get_npage() to specify advertisement bits | |
199 | * from next pages. | |
200 | */ | |
201 | static inline void | |
202 | mdio45_ethtool_ksettings_get(const struct mdio_if_info *mdio, | |
203 | struct ethtool_link_ksettings *cmd) | |
204 | { | |
205 | mdio45_ethtool_ksettings_get_npage(mdio, cmd, 0, 0); | |
206 | } | |
207 | ||
1b1c2e95 BH |
208 | extern int mdio_mii_ioctl(const struct mdio_if_info *mdio, |
209 | struct mii_ioctl_data *mii_data, int cmd); | |
210 | ||
b32607dd AB |
211 | /** |
212 | * mmd_eee_cap_to_ethtool_sup_t | |
213 | * @eee_cap: value of the MMD EEE Capability register | |
214 | * | |
215 | * A small helper function that translates MMD EEE Capability (3.20) bits | |
216 | * to ethtool supported settings. | |
217 | */ | |
218 | static inline u32 mmd_eee_cap_to_ethtool_sup_t(u16 eee_cap) | |
219 | { | |
220 | u32 supported = 0; | |
221 | ||
222 | if (eee_cap & MDIO_EEE_100TX) | |
223 | supported |= SUPPORTED_100baseT_Full; | |
224 | if (eee_cap & MDIO_EEE_1000T) | |
225 | supported |= SUPPORTED_1000baseT_Full; | |
226 | if (eee_cap & MDIO_EEE_10GT) | |
227 | supported |= SUPPORTED_10000baseT_Full; | |
228 | if (eee_cap & MDIO_EEE_1000KX) | |
229 | supported |= SUPPORTED_1000baseKX_Full; | |
230 | if (eee_cap & MDIO_EEE_10GKX4) | |
231 | supported |= SUPPORTED_10000baseKX4_Full; | |
232 | if (eee_cap & MDIO_EEE_10GKR) | |
233 | supported |= SUPPORTED_10000baseKR_Full; | |
234 | ||
235 | return supported; | |
236 | } | |
237 | ||
238 | /** | |
239 | * mmd_eee_adv_to_ethtool_adv_t | |
240 | * @eee_adv: value of the MMD EEE Advertisement/Link Partner Ability registers | |
241 | * | |
242 | * A small helper function that translates the MMD EEE Advertisment (7.60) | |
243 | * and MMD EEE Link Partner Ability (7.61) bits to ethtool advertisement | |
244 | * settings. | |
245 | */ | |
246 | static inline u32 mmd_eee_adv_to_ethtool_adv_t(u16 eee_adv) | |
247 | { | |
248 | u32 adv = 0; | |
249 | ||
250 | if (eee_adv & MDIO_EEE_100TX) | |
251 | adv |= ADVERTISED_100baseT_Full; | |
252 | if (eee_adv & MDIO_EEE_1000T) | |
253 | adv |= ADVERTISED_1000baseT_Full; | |
254 | if (eee_adv & MDIO_EEE_10GT) | |
255 | adv |= ADVERTISED_10000baseT_Full; | |
256 | if (eee_adv & MDIO_EEE_1000KX) | |
257 | adv |= ADVERTISED_1000baseKX_Full; | |
258 | if (eee_adv & MDIO_EEE_10GKX4) | |
259 | adv |= ADVERTISED_10000baseKX4_Full; | |
260 | if (eee_adv & MDIO_EEE_10GKR) | |
261 | adv |= ADVERTISED_10000baseKR_Full; | |
262 | ||
263 | return adv; | |
264 | } | |
265 | ||
266 | /** | |
267 | * ethtool_adv_to_mmd_eee_adv_t | |
268 | * @adv: the ethtool advertisement settings | |
269 | * | |
270 | * A small helper function that translates ethtool advertisement settings | |
271 | * to EEE advertisements for the MMD EEE Advertisement (7.60) and | |
272 | * MMD EEE Link Partner Ability (7.61) registers. | |
273 | */ | |
274 | static inline u16 ethtool_adv_to_mmd_eee_adv_t(u32 adv) | |
275 | { | |
276 | u16 reg = 0; | |
277 | ||
278 | if (adv & ADVERTISED_100baseT_Full) | |
279 | reg |= MDIO_EEE_100TX; | |
280 | if (adv & ADVERTISED_1000baseT_Full) | |
281 | reg |= MDIO_EEE_1000T; | |
282 | if (adv & ADVERTISED_10000baseT_Full) | |
283 | reg |= MDIO_EEE_10GT; | |
284 | if (adv & ADVERTISED_1000baseKX_Full) | |
285 | reg |= MDIO_EEE_1000KX; | |
286 | if (adv & ADVERTISED_10000baseKX4_Full) | |
287 | reg |= MDIO_EEE_10GKX4; | |
288 | if (adv & ADVERTISED_10000baseKR_Full) | |
289 | reg |= MDIO_EEE_10GKR; | |
290 | ||
291 | return reg; | |
292 | } | |
293 | ||
744e458a HK |
294 | /** |
295 | * linkmode_adv_to_mii_10gbt_adv_t | |
296 | * @advertising: the linkmode advertisement settings | |
297 | * | |
298 | * A small helper function that translates linkmode advertisement | |
299 | * settings to phy autonegotiation advertisements for the C45 | |
300 | * 10GBASE-T AN CONTROL (7.32) register. | |
301 | */ | |
302 | static inline u32 linkmode_adv_to_mii_10gbt_adv_t(unsigned long *advertising) | |
303 | { | |
304 | u32 result = 0; | |
305 | ||
306 | if (linkmode_test_bit(ETHTOOL_LINK_MODE_2500baseT_Full_BIT, | |
307 | advertising)) | |
308 | result |= MDIO_AN_10GBT_CTRL_ADV2_5G; | |
309 | if (linkmode_test_bit(ETHTOOL_LINK_MODE_5000baseT_Full_BIT, | |
310 | advertising)) | |
311 | result |= MDIO_AN_10GBT_CTRL_ADV5G; | |
312 | if (linkmode_test_bit(ETHTOOL_LINK_MODE_10000baseT_Full_BIT, | |
313 | advertising)) | |
314 | result |= MDIO_AN_10GBT_CTRL_ADV10G; | |
315 | ||
316 | return result; | |
317 | } | |
318 | ||
9004a14c HK |
319 | /** |
320 | * mii_10gbt_stat_mod_linkmode_lpa_t | |
321 | * @advertising: target the linkmode advertisement settings | |
39097ab6 | 322 | * @lpa: value of the C45 10GBASE-T AN STATUS register |
9004a14c HK |
323 | * |
324 | * A small helper function that translates C45 10GBASE-T AN STATUS register bits | |
325 | * to linkmode advertisement settings. Other bits in advertising aren't changed. | |
326 | */ | |
327 | static inline void mii_10gbt_stat_mod_linkmode_lpa_t(unsigned long *advertising, | |
328 | u32 lpa) | |
329 | { | |
330 | linkmode_mod_bit(ETHTOOL_LINK_MODE_2500baseT_Full_BIT, | |
331 | advertising, lpa & MDIO_AN_10GBT_STAT_LP2_5G); | |
332 | linkmode_mod_bit(ETHTOOL_LINK_MODE_5000baseT_Full_BIT, | |
333 | advertising, lpa & MDIO_AN_10GBT_STAT_LP5G); | |
334 | linkmode_mod_bit(ETHTOOL_LINK_MODE_10000baseT_Full_BIT, | |
335 | advertising, lpa & MDIO_AN_10GBT_STAT_LP10G); | |
336 | } | |
337 | ||
34dc08e4 RK |
338 | int __mdiobus_read(struct mii_bus *bus, int addr, u32 regnum); |
339 | int __mdiobus_write(struct mii_bus *bus, int addr, u32 regnum, u16 val); | |
6cc7cf81 RK |
340 | int __mdiobus_modify_changed(struct mii_bus *bus, int addr, u32 regnum, |
341 | u16 mask, u16 set); | |
34dc08e4 | 342 | |
bac83c65 AL |
343 | int mdiobus_read(struct mii_bus *bus, int addr, u32 regnum); |
344 | int mdiobus_read_nested(struct mii_bus *bus, int addr, u32 regnum); | |
345 | int mdiobus_write(struct mii_bus *bus, int addr, u32 regnum, u16 val); | |
346 | int mdiobus_write_nested(struct mii_bus *bus, int addr, u32 regnum, u16 val); | |
6cc7cf81 RK |
347 | int mdiobus_modify(struct mii_bus *bus, int addr, u32 regnum, u16 mask, |
348 | u16 set); | |
bac83c65 | 349 | |
90ce665c RK |
350 | static inline u32 mdiobus_c45_addr(int devad, u16 regnum) |
351 | { | |
352 | return MII_ADDR_C45 | devad << MII_DEVADDR_C45_SHIFT | regnum; | |
353 | } | |
354 | ||
355 | static inline int __mdiobus_c45_read(struct mii_bus *bus, int prtad, int devad, | |
356 | u16 regnum) | |
357 | { | |
358 | return __mdiobus_read(bus, prtad, mdiobus_c45_addr(devad, regnum)); | |
359 | } | |
360 | ||
361 | static inline int __mdiobus_c45_write(struct mii_bus *bus, int prtad, int devad, | |
362 | u16 regnum, u16 val) | |
363 | { | |
364 | return __mdiobus_write(bus, prtad, mdiobus_c45_addr(devad, regnum), | |
365 | val); | |
366 | } | |
367 | ||
368 | static inline int mdiobus_c45_read(struct mii_bus *bus, int prtad, int devad, | |
369 | u16 regnum) | |
370 | { | |
371 | return mdiobus_read(bus, prtad, mdiobus_c45_addr(devad, regnum)); | |
372 | } | |
373 | ||
2dab432c IC |
374 | static inline int mdiobus_c45_write(struct mii_bus *bus, int prtad, int devad, |
375 | u16 regnum, u16 val) | |
376 | { | |
377 | return mdiobus_write(bus, prtad, mdiobus_c45_addr(devad, regnum), val); | |
378 | } | |
379 | ||
7f854420 AL |
380 | int mdiobus_register_device(struct mdio_device *mdiodev); |
381 | int mdiobus_unregister_device(struct mdio_device *mdiodev); | |
382 | bool mdiobus_is_registered_device(struct mii_bus *bus, int addr); | |
383 | struct phy_device *mdiobus_get_phy(struct mii_bus *bus, int addr); | |
384 | ||
a9049e0c | 385 | /** |
b70f43a1 | 386 | * mdio_module_driver() - Helper macro for registering mdio drivers |
39097ab6 | 387 | * @_mdio_driver: driver to register |
a9049e0c AL |
388 | * |
389 | * Helper macro for MDIO drivers which do not do anything special in module | |
390 | * init/exit. Each module may only use this macro once, and calling it | |
391 | * replaces module_init() and module_exit(). | |
392 | */ | |
393 | #define mdio_module_driver(_mdio_driver) \ | |
394 | static int __init mdio_module_init(void) \ | |
395 | { \ | |
396 | return mdio_driver_register(&_mdio_driver); \ | |
397 | } \ | |
398 | module_init(mdio_module_init); \ | |
399 | static void __exit mdio_module_exit(void) \ | |
400 | { \ | |
401 | mdio_driver_unregister(&_mdio_driver); \ | |
402 | } \ | |
403 | module_exit(mdio_module_exit) | |
404 | ||
52c94dfa | 405 | #endif /* __LINUX_MDIO_H__ */ |