xref: /linux-6.15/include/linux/mdio.h (revision 71ccc212)
1 /*
2  * linux/mdio.h: definitions for MDIO (clause 45) transceivers
3  * Copyright 2006-2009 Solarflare Communications Inc.
4  *
5  * This program is free software; you can redistribute it and/or modify it
6  * under the terms of the GNU General Public License version 2 as published
7  * by the Free Software Foundation, incorporated herein by reference.
8  */
9 
10 #ifndef __LINUX_MDIO_H__
11 #define __LINUX_MDIO_H__
12 
13 #include <linux/mii.h>
14 
15 /* MDIO Manageable Devices (MMDs). */
16 #define MDIO_MMD_PMAPMD		1	/* Physical Medium Attachment/
17 					 * Physical Medium Dependent */
18 #define MDIO_MMD_WIS		2	/* WAN Interface Sublayer */
19 #define MDIO_MMD_PCS		3	/* Physical Coding Sublayer */
20 #define MDIO_MMD_PHYXS		4	/* PHY Extender Sublayer */
21 #define MDIO_MMD_DTEXS		5	/* DTE Extender Sublayer */
22 #define MDIO_MMD_TC		6	/* Transmission Convergence */
23 #define MDIO_MMD_AN		7	/* Auto-Negotiation */
24 #define MDIO_MMD_C22EXT		29	/* Clause 22 extension */
25 #define MDIO_MMD_VEND1		30	/* Vendor specific 1 */
26 #define MDIO_MMD_VEND2		31	/* Vendor specific 2 */
27 
28 /* Generic MDIO registers. */
29 #define MDIO_CTRL1		MII_BMCR
30 #define MDIO_STAT1		MII_BMSR
31 #define MDIO_DEVID1		MII_PHYSID1
32 #define MDIO_DEVID2		MII_PHYSID2
33 #define MDIO_SPEED		4	/* Speed ability */
34 #define MDIO_DEVS1		5	/* Devices in package */
35 #define MDIO_DEVS2		6
36 #define MDIO_CTRL2		7	/* 10G control 2 */
37 #define MDIO_STAT2		8	/* 10G status 2 */
38 #define MDIO_PMA_TXDIS		9	/* 10G PMA/PMD transmit disable */
39 #define MDIO_PMA_RXDET		10	/* 10G PMA/PMD receive signal detect */
40 #define MDIO_PMA_EXTABLE	11	/* 10G PMA/PMD extended ability */
41 #define MDIO_PKGID1		14	/* Package identifier */
42 #define MDIO_PKGID2		15
43 #define MDIO_AN_ADVERTISE	16	/* AN advertising (base page) */
44 #define MDIO_AN_LPA		19	/* AN LP abilities (base page) */
45 #define MDIO_PHYXS_LNSTAT	24	/* PHY XGXS lane state */
46 
47 /* Media-dependent registers. */
48 #define MDIO_PMA_10GBT_SWAPPOL	130	/* 10GBASE-T pair swap & polarity */
49 #define MDIO_PMA_10GBT_TXPWR	131	/* 10GBASE-T TX power control */
50 #define MDIO_PMA_10GBT_SNR	133	/* 10GBASE-T SNR margin, lane A.
51 					 * Lanes B-D are numbered 134-136. */
52 #define MDIO_PMA_10GBR_FECABLE	170	/* 10GBASE-R FEC ability */
53 #define MDIO_PCS_10GBX_STAT1	24	/* 10GBASE-X PCS status 1 */
54 #define MDIO_PCS_10GBRT_STAT1	32	/* 10GBASE-R/-T PCS status 1 */
55 #define MDIO_PCS_10GBRT_STAT2	33	/* 10GBASE-R/-T PCS status 2 */
56 #define MDIO_AN_10GBT_CTRL	32	/* 10GBASE-T auto-negotiation control */
57 #define MDIO_AN_10GBT_STAT	33	/* 10GBASE-T auto-negotiation status */
58 
59 /* LASI (Link Alarm Status Interrupt) registers, defined by XENPAK MSA. */
60 #define MDIO_PMA_LASI_RXCTRL	0x9000	/* RX_ALARM control */
61 #define MDIO_PMA_LASI_TXCTRL	0x9001	/* TX_ALARM control */
62 #define MDIO_PMA_LASI_CTRL	0x9002	/* LASI control */
63 #define MDIO_PMA_LASI_RXSTAT	0x9003	/* RX_ALARM status */
64 #define MDIO_PMA_LASI_TXSTAT	0x9004	/* TX_ALARM status */
65 #define MDIO_PMA_LASI_STAT	0x9005	/* LASI status */
66 
67 /* Control register 1. */
68 /* Enable extended speed selection */
69 #define MDIO_CTRL1_SPEEDSELEXT		(BMCR_SPEED1000 | BMCR_SPEED100)
70 /* All speed selection bits */
71 #define MDIO_CTRL1_SPEEDSEL		(MDIO_CTRL1_SPEEDSELEXT | 0x003c)
72 #define MDIO_CTRL1_FULLDPLX		BMCR_FULLDPLX
73 #define MDIO_CTRL1_LPOWER		BMCR_PDOWN
74 #define MDIO_CTRL1_RESET		BMCR_RESET
75 #define MDIO_PMA_CTRL1_LOOPBACK		0x0001
76 #define MDIO_PMA_CTRL1_SPEED1000	BMCR_SPEED1000
77 #define MDIO_PMA_CTRL1_SPEED100		BMCR_SPEED100
78 #define MDIO_PCS_CTRL1_LOOPBACK		BMCR_LOOPBACK
79 #define MDIO_PHYXS_CTRL1_LOOPBACK	BMCR_LOOPBACK
80 #define MDIO_AN_CTRL1_RESTART		BMCR_ANRESTART
81 #define MDIO_AN_CTRL1_ENABLE		BMCR_ANENABLE
82 #define MDIO_AN_CTRL1_XNP		0x2000	/* Enable extended next page */
83 
84 /* 10 Gb/s */
85 #define MDIO_CTRL1_SPEED10G		(MDIO_CTRL1_SPEEDSELEXT | 0x00)
86 /* 10PASS-TS/2BASE-TL */
87 #define MDIO_CTRL1_SPEED10P2B		(MDIO_CTRL1_SPEEDSELEXT | 0x04)
88 
89 /* Status register 1. */
90 #define MDIO_STAT1_LPOWERABLE		0x0002	/* Low-power ability */
91 #define MDIO_STAT1_LSTATUS		BMSR_LSTATUS
92 #define MDIO_STAT1_FAULT		0x0080	/* Fault */
93 #define MDIO_AN_STAT1_LPABLE		0x0001	/* Link partner AN ability */
94 #define MDIO_AN_STAT1_ABLE		BMSR_ANEGCAPABLE
95 #define MDIO_AN_STAT1_RFAULT		BMSR_RFAULT
96 #define MDIO_AN_STAT1_COMPLETE		BMSR_ANEGCOMPLETE
97 #define MDIO_AN_STAT1_PAGE		0x0040	/* Page received */
98 #define MDIO_AN_STAT1_XNP		0x0080	/* Extended next page status */
99 
100 /* Speed register. */
101 #define MDIO_SPEED_10G			0x0001	/* 10G capable */
102 #define MDIO_PMA_SPEED_2B		0x0002	/* 2BASE-TL capable */
103 #define MDIO_PMA_SPEED_10P		0x0004	/* 10PASS-TS capable */
104 #define MDIO_PMA_SPEED_1000		0x0010	/* 1000M capable */
105 #define MDIO_PMA_SPEED_100		0x0020	/* 100M capable */
106 #define MDIO_PMA_SPEED_10		0x0040	/* 10M capable */
107 #define MDIO_PCS_SPEED_10P2B		0x0002	/* 10PASS-TS/2BASE-TL capable */
108 
109 /* Device present registers. */
110 #define MDIO_DEVS_PRESENT(devad)	(1 << (devad))
111 #define MDIO_DEVS_PMAPMD		MDIO_DEVS_PRESENT(MDIO_MMD_PMAPMD)
112 #define MDIO_DEVS_WIS			MDIO_DEVS_PRESENT(MDIO_MMD_WIS)
113 #define MDIO_DEVS_PCS			MDIO_DEVS_PRESENT(MDIO_MMD_PCS)
114 #define MDIO_DEVS_PHYXS			MDIO_DEVS_PRESENT(MDIO_MMD_PHYXS)
115 #define MDIO_DEVS_DTEXS			MDIO_DEVS_PRESENT(MDIO_MMD_DTEXS)
116 #define MDIO_DEVS_TC			MDIO_DEVS_PRESENT(MDIO_MMD_TC)
117 #define MDIO_DEVS_AN			MDIO_DEVS_PRESENT(MDIO_MMD_AN)
118 #define MDIO_DEVS_C22EXT		MDIO_DEVS_PRESENT(MDIO_MMD_C22EXT)
119 
120 /* Control register 2. */
121 #define MDIO_PMA_CTRL2_TYPE		0x000f	/* PMA/PMD type selection */
122 #define MDIO_PMA_CTRL2_10GBCX4		0x0000	/* 10GBASE-CX4 type */
123 #define MDIO_PMA_CTRL2_10GBEW		0x0001	/* 10GBASE-EW type */
124 #define MDIO_PMA_CTRL2_10GBLW		0x0002	/* 10GBASE-LW type */
125 #define MDIO_PMA_CTRL2_10GBSW		0x0003	/* 10GBASE-SW type */
126 #define MDIO_PMA_CTRL2_10GBLX4		0x0004	/* 10GBASE-LX4 type */
127 #define MDIO_PMA_CTRL2_10GBER		0x0005	/* 10GBASE-ER type */
128 #define MDIO_PMA_CTRL2_10GBLR		0x0006	/* 10GBASE-LR type */
129 #define MDIO_PMA_CTRL2_10GBSR		0x0007	/* 10GBASE-SR type */
130 #define MDIO_PMA_CTRL2_10GBLRM		0x0008	/* 10GBASE-LRM type */
131 #define MDIO_PMA_CTRL2_10GBT		0x0009	/* 10GBASE-T type */
132 #define MDIO_PMA_CTRL2_10GBKX4		0x000a	/* 10GBASE-KX4 type */
133 #define MDIO_PMA_CTRL2_10GBKR		0x000b	/* 10GBASE-KR type */
134 #define MDIO_PMA_CTRL2_1000BT		0x000c	/* 1000BASE-T type */
135 #define MDIO_PMA_CTRL2_1000BKX		0x000d	/* 1000BASE-KX type */
136 #define MDIO_PMA_CTRL2_100BTX		0x000e	/* 100BASE-TX type */
137 #define MDIO_PMA_CTRL2_10BT		0x000f	/* 10BASE-T type */
138 #define MDIO_PCS_CTRL2_TYPE		0x0003	/* PCS type selection */
139 #define MDIO_PCS_CTRL2_10GBR		0x0000	/* 10GBASE-R type */
140 #define MDIO_PCS_CTRL2_10GBX		0x0001	/* 10GBASE-X type */
141 #define MDIO_PCS_CTRL2_10GBW		0x0002	/* 10GBASE-W type */
142 #define MDIO_PCS_CTRL2_10GBT		0x0003	/* 10GBASE-T type */
143 
144 /* Status register 2. */
145 #define MDIO_STAT2_RXFAULT		0x0400	/* Receive fault */
146 #define MDIO_STAT2_TXFAULT		0x0800	/* Transmit fault */
147 #define MDIO_STAT2_DEVPRST		0xc000	/* Device present */
148 #define MDIO_STAT2_DEVPRST_VAL		0x8000	/* Device present value */
149 #define MDIO_PMA_STAT2_LBABLE		0x0001	/* PMA loopback ability */
150 #define MDIO_PMA_STAT2_10GBEW		0x0002	/* 10GBASE-EW ability */
151 #define MDIO_PMA_STAT2_10GBLW		0x0004	/* 10GBASE-LW ability */
152 #define MDIO_PMA_STAT2_10GBSW		0x0008	/* 10GBASE-SW ability */
153 #define MDIO_PMA_STAT2_10GBLX4		0x0010	/* 10GBASE-LX4 ability */
154 #define MDIO_PMA_STAT2_10GBER		0x0020	/* 10GBASE-ER ability */
155 #define MDIO_PMA_STAT2_10GBLR		0x0040	/* 10GBASE-LR ability */
156 #define MDIO_PMA_STAT2_10GBSR		0x0080	/* 10GBASE-SR ability */
157 #define MDIO_PMD_STAT2_TXDISAB		0x0100	/* PMD TX disable ability */
158 #define MDIO_PMA_STAT2_EXTABLE		0x0200	/* Extended abilities */
159 #define MDIO_PMA_STAT2_RXFLTABLE	0x1000	/* Receive fault ability */
160 #define MDIO_PMA_STAT2_TXFLTABLE	0x2000	/* Transmit fault ability */
161 #define MDIO_PCS_STAT2_10GBR		0x0001	/* 10GBASE-R capable */
162 #define MDIO_PCS_STAT2_10GBX		0x0002	/* 10GBASE-X capable */
163 #define MDIO_PCS_STAT2_10GBW		0x0004	/* 10GBASE-W capable */
164 #define MDIO_PCS_STAT2_RXFLTABLE	0x1000	/* Receive fault ability */
165 #define MDIO_PCS_STAT2_TXFLTABLE	0x2000	/* Transmit fault ability */
166 
167 /* Transmit disable register. */
168 #define MDIO_PMD_TXDIS_GLOBAL		0x0001	/* Global PMD TX disable */
169 #define MDIO_PMD_TXDIS_0		0x0002	/* PMD TX disable 0 */
170 #define MDIO_PMD_TXDIS_1		0x0004	/* PMD TX disable 1 */
171 #define MDIO_PMD_TXDIS_2		0x0008	/* PMD TX disable 2 */
172 #define MDIO_PMD_TXDIS_3		0x0010	/* PMD TX disable 3 */
173 
174 /* Receive signal detect register. */
175 #define MDIO_PMD_RXDET_GLOBAL		0x0001	/* Global PMD RX signal detect */
176 #define MDIO_PMD_RXDET_0		0x0002	/* PMD RX signal detect 0 */
177 #define MDIO_PMD_RXDET_1		0x0004	/* PMD RX signal detect 1 */
178 #define MDIO_PMD_RXDET_2		0x0008	/* PMD RX signal detect 2 */
179 #define MDIO_PMD_RXDET_3		0x0010	/* PMD RX signal detect 3 */
180 
181 /* Extended abilities register. */
182 #define MDIO_PMA_EXTABLE_10GCX4		0x0001	/* 10GBASE-CX4 ability */
183 #define MDIO_PMA_EXTABLE_10GBLRM	0x0002	/* 10GBASE-LRM ability */
184 #define MDIO_PMA_EXTABLE_10GBT		0x0004	/* 10GBASE-T ability */
185 #define MDIO_PMA_EXTABLE_10GBKX4	0x0008	/* 10GBASE-KX4 ability */
186 #define MDIO_PMA_EXTABLE_10GBKR		0x0010	/* 10GBASE-KR ability */
187 #define MDIO_PMA_EXTABLE_1000BT		0x0020	/* 1000BASE-T ability */
188 #define MDIO_PMA_EXTABLE_1000BKX	0x0040	/* 1000BASE-KX ability */
189 #define MDIO_PMA_EXTABLE_100BTX		0x0080	/* 100BASE-TX ability */
190 #define MDIO_PMA_EXTABLE_10BT		0x0100	/* 10BASE-T ability */
191 
192 /* PHY XGXS lane state register. */
193 #define MDIO_PHYXS_LNSTAT_SYNC0		0x0001
194 #define MDIO_PHYXS_LNSTAT_SYNC1		0x0002
195 #define MDIO_PHYXS_LNSTAT_SYNC2		0x0004
196 #define MDIO_PHYXS_LNSTAT_SYNC3		0x0008
197 #define MDIO_PHYXS_LNSTAT_ALIGN		0x1000
198 
199 /* PMA 10GBASE-T pair swap & polarity */
200 #define MDIO_PMA_10GBT_SWAPPOL_ABNX	0x0001	/* Pair A/B uncrossed */
201 #define MDIO_PMA_10GBT_SWAPPOL_CDNX	0x0002	/* Pair C/D uncrossed */
202 #define MDIO_PMA_10GBT_SWAPPOL_AREV	0x0100	/* Pair A polarity reversed */
203 #define MDIO_PMA_10GBT_SWAPPOL_BREV	0x0200	/* Pair B polarity reversed */
204 #define MDIO_PMA_10GBT_SWAPPOL_CREV	0x0400	/* Pair C polarity reversed */
205 #define MDIO_PMA_10GBT_SWAPPOL_DREV	0x0800	/* Pair D polarity reversed */
206 
207 /* PMA 10GBASE-T TX power register. */
208 #define MDIO_PMA_10GBT_TXPWR_SHORT	0x0001	/* Short-reach mode */
209 
210 /* PMA 10GBASE-T SNR registers. */
211 /* Value is SNR margin in dB, clamped to range [-127, 127], plus 0x8000. */
212 #define MDIO_PMA_10GBT_SNR_BIAS		0x8000
213 #define MDIO_PMA_10GBT_SNR_MAX		127
214 
215 /* PMA 10GBASE-R FEC ability register. */
216 #define MDIO_PMA_10GBR_FECABLE_ABLE	0x0001	/* FEC ability */
217 #define MDIO_PMA_10GBR_FECABLE_ERRABLE	0x0002	/* FEC error indic. ability */
218 
219 /* PCS 10GBASE-R/-T status register 1. */
220 #define MDIO_PCS_10GBRT_STAT1_BLKLK	0x0001	/* Block lock attained */
221 
222 /* PCS 10GBASE-R/-T status register 2. */
223 #define MDIO_PCS_10GBRT_STAT2_ERR	0x00ff
224 #define MDIO_PCS_10GBRT_STAT2_BER	0x3f00
225 
226 /* AN 10GBASE-T control register. */
227 #define MDIO_AN_10GBT_CTRL_ADV10G	0x1000	/* Advertise 10GBASE-T */
228 
229 /* AN 10GBASE-T status register. */
230 #define MDIO_AN_10GBT_STAT_LPTRR	0x0200	/* LP training reset req. */
231 #define MDIO_AN_10GBT_STAT_LPLTABLE	0x0400	/* LP loop timing ability */
232 #define MDIO_AN_10GBT_STAT_LP10G	0x0800	/* LP is 10GBT capable */
233 #define MDIO_AN_10GBT_STAT_REMOK	0x1000	/* Remote OK */
234 #define MDIO_AN_10GBT_STAT_LOCOK	0x2000	/* Local OK */
235 #define MDIO_AN_10GBT_STAT_MS		0x4000	/* Master/slave config */
236 #define MDIO_AN_10GBT_STAT_MSFLT	0x8000	/* Master/slave config fault */
237 
238 /* LASI RX_ALARM control/status registers. */
239 #define MDIO_PMA_LASI_RX_PHYXSLFLT	0x0001	/* PHY XS RX local fault */
240 #define MDIO_PMA_LASI_RX_PCSLFLT	0x0008	/* PCS RX local fault */
241 #define MDIO_PMA_LASI_RX_PMALFLT	0x0010	/* PMA/PMD RX local fault */
242 #define MDIO_PMA_LASI_RX_OPTICPOWERFLT	0x0020	/* RX optical power fault */
243 #define MDIO_PMA_LASI_RX_WISLFLT	0x0200	/* WIS local fault */
244 
245 /* LASI TX_ALARM control/status registers. */
246 #define MDIO_PMA_LASI_TX_PHYXSLFLT	0x0001	/* PHY XS TX local fault */
247 #define MDIO_PMA_LASI_TX_PCSLFLT	0x0008	/* PCS TX local fault */
248 #define MDIO_PMA_LASI_TX_PMALFLT	0x0010	/* PMA/PMD TX local fault */
249 #define MDIO_PMA_LASI_TX_LASERPOWERFLT	0x0080	/* Laser output power fault */
250 #define MDIO_PMA_LASI_TX_LASERTEMPFLT	0x0100	/* Laser temperature fault */
251 #define MDIO_PMA_LASI_TX_LASERBICURRFLT	0x0200	/* Laser bias current fault */
252 
253 /* LASI control/status registers. */
254 #define MDIO_PMA_LASI_LSALARM		0x0001	/* LS_ALARM enable/status */
255 #define MDIO_PMA_LASI_TXALARM		0x0002	/* TX_ALARM enable/status */
256 #define MDIO_PMA_LASI_RXALARM		0x0004	/* RX_ALARM enable/status */
257 
258 /* Mapping between MDIO PRTAD/DEVAD and mii_ioctl_data::phy_id */
259 
260 #define MDIO_PHY_ID_C45			0x8000
261 #define MDIO_PHY_ID_PRTAD		0x03e0
262 #define MDIO_PHY_ID_DEVAD		0x001f
263 #define MDIO_PHY_ID_C45_MASK						\
264 	(MDIO_PHY_ID_C45 | MDIO_PHY_ID_PRTAD | MDIO_PHY_ID_DEVAD)
265 
266 static inline __u16 mdio_phy_id_c45(int prtad, int devad)
267 {
268 	return MDIO_PHY_ID_C45 | (prtad << 5) | devad;
269 }
270 
271 static inline bool mdio_phy_id_is_c45(int phy_id)
272 {
273 	return (phy_id & MDIO_PHY_ID_C45) && !(phy_id & ~MDIO_PHY_ID_C45_MASK);
274 }
275 
276 static inline __u16 mdio_phy_id_prtad(int phy_id)
277 {
278 	return (phy_id & MDIO_PHY_ID_PRTAD) >> 5;
279 }
280 
281 static inline __u16 mdio_phy_id_devad(int phy_id)
282 {
283 	return phy_id & MDIO_PHY_ID_DEVAD;
284 }
285 
286 #define MDIO_SUPPORTS_C22		1
287 #define MDIO_SUPPORTS_C45		2
288 
289 #ifdef __KERNEL__
290 
291 /**
292  * struct mdio_if_info - Ethernet controller MDIO interface
293  * @prtad: PRTAD of the PHY (%MDIO_PRTAD_NONE if not present/unknown)
294  * @mmds: Mask of MMDs expected to be present in the PHY.  This must be
295  *	non-zero unless @prtad = %MDIO_PRTAD_NONE.
296  * @mode_support: MDIO modes supported.  If %MDIO_SUPPORTS_C22 is set then
297  *	MII register access will be passed through with @devad =
298  *	%MDIO_DEVAD_NONE.  If %MDIO_EMULATE_C22 is set then access to
299  *	commonly used clause 22 registers will be translated into
300  *	clause 45 registers.
301  * @dev: Net device structure
302  * @mdio_read: Register read function; returns value or negative error code
303  * @mdio_write: Register write function; returns 0 or negative error code
304  */
305 struct mdio_if_info {
306 	int prtad;
307 	u32 mmds;
308 	unsigned mode_support;
309 
310 	struct net_device *dev;
311 	int (*mdio_read)(struct net_device *dev, int prtad, int devad,
312 			 u16 addr);
313 	int (*mdio_write)(struct net_device *dev, int prtad, int devad,
314 			  u16 addr, u16 val);
315 };
316 
317 #define MDIO_PRTAD_NONE			(-1)
318 #define MDIO_DEVAD_NONE			(-1)
319 #define MDIO_EMULATE_C22		4
320 
321 struct ethtool_cmd;
322 struct ethtool_pauseparam;
323 extern int mdio45_probe(struct mdio_if_info *mdio, int prtad);
324 extern int mdio_set_flag(const struct mdio_if_info *mdio,
325 			 int prtad, int devad, u16 addr, int mask,
326 			 bool sense);
327 extern int mdio45_links_ok(const struct mdio_if_info *mdio, u32 mmds);
328 extern int mdio45_nway_restart(const struct mdio_if_info *mdio);
329 extern void mdio45_ethtool_gset_npage(const struct mdio_if_info *mdio,
330 				      struct ethtool_cmd *ecmd,
331 				      u32 npage_adv, u32 npage_lpa);
332 extern void
333 mdio45_ethtool_spauseparam_an(const struct mdio_if_info *mdio,
334 			      const struct ethtool_pauseparam *ecmd);
335 
336 /**
337  * mdio45_ethtool_gset - get settings for ETHTOOL_GSET
338  * @mdio: MDIO interface
339  * @ecmd: Ethtool request structure
340  *
341  * Since the CSRs for auto-negotiation using next pages are not fully
342  * standardised, this function does not attempt to decode them.  Use
343  * mdio45_ethtool_gset_npage() to specify advertisement bits from next
344  * pages.
345  */
346 static inline void mdio45_ethtool_gset(const struct mdio_if_info *mdio,
347 				       struct ethtool_cmd *ecmd)
348 {
349 	mdio45_ethtool_gset_npage(mdio, ecmd, 0, 0);
350 }
351 
352 extern int mdio_mii_ioctl(const struct mdio_if_info *mdio,
353 			  struct mii_ioctl_data *mii_data, int cmd);
354 
355 #endif /* __KERNEL__ */
356 #endif /* __LINUX_MDIO_H__ */
357