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00db8189 AF |
1 | /* |
2 | * include/linux/phy.h | |
3 | * | |
4 | * Framework and drivers for configuring and reading different PHYs | |
5 | * Based on code in sungem_phy.c and gianfar_phy.c | |
6 | * | |
7 | * Author: Andy Fleming | |
8 | * | |
9 | * Copyright (c) 2004 Freescale Semiconductor, Inc. | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify it | |
12 | * under the terms of the GNU General Public License as published by the | |
13 | * Free Software Foundation; either version 2 of the License, or (at your | |
14 | * option) any later version. | |
15 | * | |
16 | */ | |
17 | ||
18 | #ifndef __PHY_H | |
19 | #define __PHY_H | |
20 | ||
21 | #include <linux/spinlock.h> | |
22 | #include <linux/device.h> | |
13df29f6 MR |
23 | #include <linux/ethtool.h> |
24 | #include <linux/mii.h> | |
25 | #include <linux/timer.h> | |
26 | #include <linux/workqueue.h> | |
00db8189 | 27 | |
0ac49527 MR |
28 | #include <asm/atomic.h> |
29 | ||
00db8189 AF |
30 | #define PHY_BASIC_FEATURES (SUPPORTED_10baseT_Half | \ |
31 | SUPPORTED_10baseT_Full | \ | |
32 | SUPPORTED_100baseT_Half | \ | |
33 | SUPPORTED_100baseT_Full | \ | |
34 | SUPPORTED_Autoneg | \ | |
35 | SUPPORTED_TP | \ | |
36 | SUPPORTED_MII) | |
37 | ||
38 | #define PHY_GBIT_FEATURES (PHY_BASIC_FEATURES | \ | |
39 | SUPPORTED_1000baseT_Half | \ | |
40 | SUPPORTED_1000baseT_Full) | |
41 | ||
c5e38a94 AF |
42 | /* |
43 | * Set phydev->irq to PHY_POLL if interrupts are not supported, | |
00db8189 AF |
44 | * or not desired for this PHY. Set to PHY_IGNORE_INTERRUPT if |
45 | * the attached driver handles the interrupt | |
46 | */ | |
47 | #define PHY_POLL -1 | |
48 | #define PHY_IGNORE_INTERRUPT -2 | |
49 | ||
50 | #define PHY_HAS_INTERRUPT 0x00000001 | |
51 | #define PHY_HAS_MAGICANEG 0x00000002 | |
52 | ||
e8a2b6a4 AF |
53 | /* Interface Mode definitions */ |
54 | typedef enum { | |
55 | PHY_INTERFACE_MODE_MII, | |
56 | PHY_INTERFACE_MODE_GMII, | |
57 | PHY_INTERFACE_MODE_SGMII, | |
58 | PHY_INTERFACE_MODE_TBI, | |
59 | PHY_INTERFACE_MODE_RMII, | |
60 | PHY_INTERFACE_MODE_RGMII, | |
a999589c | 61 | PHY_INTERFACE_MODE_RGMII_ID, |
7d400a4c KP |
62 | PHY_INTERFACE_MODE_RGMII_RXID, |
63 | PHY_INTERFACE_MODE_RGMII_TXID, | |
e8a2b6a4 AF |
64 | PHY_INTERFACE_MODE_RTBI |
65 | } phy_interface_t; | |
66 | ||
00db8189 | 67 | |
e8a2b6a4 | 68 | #define PHY_INIT_TIMEOUT 100000 |
00db8189 AF |
69 | #define PHY_STATE_TIME 1 |
70 | #define PHY_FORCE_TIMEOUT 10 | |
71 | #define PHY_AN_TIMEOUT 10 | |
72 | ||
e8a2b6a4 | 73 | #define PHY_MAX_ADDR 32 |
00db8189 | 74 | |
a4d00f17 | 75 | /* Used when trying to connect to a specific phy (mii bus id:phy device id) */ |
9d9326d3 AF |
76 | #define PHY_ID_FMT "%s:%02x" |
77 | ||
78 | /* | |
79 | * Need to be a little smaller than phydev->dev.bus_id to leave room | |
80 | * for the ":%02x" | |
81 | */ | |
82 | #define MII_BUS_ID_SIZE (BUS_ID_SIZE - 3) | |
a4d00f17 | 83 | |
c5e38a94 AF |
84 | /* |
85 | * The Bus class for PHYs. Devices which provide access to | |
86 | * PHYs should register using this structure | |
87 | */ | |
00db8189 AF |
88 | struct mii_bus { |
89 | const char *name; | |
9d9326d3 | 90 | char id[MII_BUS_ID_SIZE]; |
00db8189 AF |
91 | void *priv; |
92 | int (*read)(struct mii_bus *bus, int phy_id, int regnum); | |
93 | int (*write)(struct mii_bus *bus, int phy_id, int regnum, u16 val); | |
94 | int (*reset)(struct mii_bus *bus); | |
95 | ||
c5e38a94 AF |
96 | /* |
97 | * A lock to ensure that only one thing can read/write | |
98 | * the MDIO bus at a time | |
99 | */ | |
35b5f6b1 | 100 | struct mutex mdio_lock; |
00db8189 | 101 | |
18ee49dd | 102 | struct device *parent; |
46abc021 LB |
103 | enum { |
104 | MDIOBUS_ALLOCATED = 1, | |
105 | MDIOBUS_REGISTERED, | |
106 | MDIOBUS_UNREGISTERED, | |
107 | MDIOBUS_RELEASED, | |
108 | } state; | |
109 | struct device dev; | |
00db8189 AF |
110 | |
111 | /* list of all PHYs on bus */ | |
112 | struct phy_device *phy_map[PHY_MAX_ADDR]; | |
113 | ||
f896424c MP |
114 | /* Phy addresses to be ignored when probing */ |
115 | u32 phy_mask; | |
116 | ||
c5e38a94 AF |
117 | /* |
118 | * Pointer to an array of interrupts, each PHY's | |
119 | * interrupt at the index matching its address | |
120 | */ | |
00db8189 AF |
121 | int *irq; |
122 | }; | |
46abc021 | 123 | #define to_mii_bus(d) container_of(d, struct mii_bus, dev) |
00db8189 | 124 | |
e8a2b6a4 AF |
125 | #define PHY_INTERRUPT_DISABLED 0x0 |
126 | #define PHY_INTERRUPT_ENABLED 0x80000000 | |
00db8189 AF |
127 | |
128 | /* PHY state machine states: | |
129 | * | |
130 | * DOWN: PHY device and driver are not ready for anything. probe | |
131 | * should be called if and only if the PHY is in this state, | |
132 | * given that the PHY device exists. | |
133 | * - PHY driver probe function will, depending on the PHY, set | |
134 | * the state to STARTING or READY | |
135 | * | |
136 | * STARTING: PHY device is coming up, and the ethernet driver is | |
137 | * not ready. PHY drivers may set this in the probe function. | |
138 | * If they do, they are responsible for making sure the state is | |
139 | * eventually set to indicate whether the PHY is UP or READY, | |
140 | * depending on the state when the PHY is done starting up. | |
141 | * - PHY driver will set the state to READY | |
142 | * - start will set the state to PENDING | |
143 | * | |
144 | * READY: PHY is ready to send and receive packets, but the | |
145 | * controller is not. By default, PHYs which do not implement | |
146 | * probe will be set to this state by phy_probe(). If the PHY | |
147 | * driver knows the PHY is ready, and the PHY state is STARTING, | |
148 | * then it sets this STATE. | |
149 | * - start will set the state to UP | |
150 | * | |
151 | * PENDING: PHY device is coming up, but the ethernet driver is | |
152 | * ready. phy_start will set this state if the PHY state is | |
153 | * STARTING. | |
154 | * - PHY driver will set the state to UP when the PHY is ready | |
155 | * | |
156 | * UP: The PHY and attached device are ready to do work. | |
157 | * Interrupts should be started here. | |
158 | * - timer moves to AN | |
159 | * | |
160 | * AN: The PHY is currently negotiating the link state. Link is | |
161 | * therefore down for now. phy_timer will set this state when it | |
162 | * detects the state is UP. config_aneg will set this state | |
163 | * whenever called with phydev->autoneg set to AUTONEG_ENABLE. | |
164 | * - If autonegotiation finishes, but there's no link, it sets | |
165 | * the state to NOLINK. | |
166 | * - If aneg finishes with link, it sets the state to RUNNING, | |
167 | * and calls adjust_link | |
168 | * - If autonegotiation did not finish after an arbitrary amount | |
169 | * of time, autonegotiation should be tried again if the PHY | |
170 | * supports "magic" autonegotiation (back to AN) | |
171 | * - If it didn't finish, and no magic_aneg, move to FORCING. | |
172 | * | |
173 | * NOLINK: PHY is up, but not currently plugged in. | |
174 | * - If the timer notes that the link comes back, we move to RUNNING | |
175 | * - config_aneg moves to AN | |
176 | * - phy_stop moves to HALTED | |
177 | * | |
178 | * FORCING: PHY is being configured with forced settings | |
179 | * - if link is up, move to RUNNING | |
180 | * - If link is down, we drop to the next highest setting, and | |
181 | * retry (FORCING) after a timeout | |
182 | * - phy_stop moves to HALTED | |
183 | * | |
184 | * RUNNING: PHY is currently up, running, and possibly sending | |
185 | * and/or receiving packets | |
186 | * - timer will set CHANGELINK if we're polling (this ensures the | |
187 | * link state is polled every other cycle of this state machine, | |
188 | * which makes it every other second) | |
189 | * - irq will set CHANGELINK | |
190 | * - config_aneg will set AN | |
191 | * - phy_stop moves to HALTED | |
192 | * | |
193 | * CHANGELINK: PHY experienced a change in link state | |
194 | * - timer moves to RUNNING if link | |
195 | * - timer moves to NOLINK if the link is down | |
196 | * - phy_stop moves to HALTED | |
197 | * | |
198 | * HALTED: PHY is up, but no polling or interrupts are done. Or | |
199 | * PHY is in an error state. | |
200 | * | |
201 | * - phy_start moves to RESUMING | |
202 | * | |
203 | * RESUMING: PHY was halted, but now wants to run again. | |
204 | * - If we are forcing, or aneg is done, timer moves to RUNNING | |
205 | * - If aneg is not done, timer moves to AN | |
206 | * - phy_stop moves to HALTED | |
207 | */ | |
208 | enum phy_state { | |
209 | PHY_DOWN=0, | |
210 | PHY_STARTING, | |
211 | PHY_READY, | |
212 | PHY_PENDING, | |
213 | PHY_UP, | |
214 | PHY_AN, | |
215 | PHY_RUNNING, | |
216 | PHY_NOLINK, | |
217 | PHY_FORCING, | |
218 | PHY_CHANGELINK, | |
219 | PHY_HALTED, | |
220 | PHY_RESUMING | |
221 | }; | |
222 | ||
223 | /* phy_device: An instance of a PHY | |
224 | * | |
225 | * drv: Pointer to the driver for this PHY instance | |
226 | * bus: Pointer to the bus this PHY is on | |
227 | * dev: driver model device structure for this PHY | |
228 | * phy_id: UID for this device found during discovery | |
229 | * state: state of the PHY for management purposes | |
230 | * dev_flags: Device-specific flags used by the PHY driver. | |
231 | * addr: Bus address of PHY | |
232 | * link_timeout: The number of timer firings to wait before the | |
233 | * giving up on the current attempt at acquiring a link | |
234 | * irq: IRQ number of the PHY's interrupt (-1 if none) | |
235 | * phy_timer: The timer for handling the state machine | |
236 | * phy_queue: A work_queue for the interrupt | |
237 | * attached_dev: The attached enet driver's device instance ptr | |
238 | * adjust_link: Callback for the enet controller to respond to | |
239 | * changes in the link state. | |
240 | * adjust_state: Callback for the enet driver to respond to | |
241 | * changes in the state machine. | |
242 | * | |
243 | * speed, duplex, pause, supported, advertising, and | |
244 | * autoneg are used like in mii_if_info | |
245 | * | |
246 | * interrupts currently only supports enabled or disabled, | |
247 | * but could be changed in the future to support enabling | |
248 | * and disabling specific interrupts | |
249 | * | |
250 | * Contains some infrastructure for polling and interrupt | |
251 | * handling, as well as handling shifts in PHY hardware state | |
252 | */ | |
253 | struct phy_device { | |
254 | /* Information about the PHY type */ | |
255 | /* And management functions */ | |
256 | struct phy_driver *drv; | |
257 | ||
258 | struct mii_bus *bus; | |
259 | ||
260 | struct device dev; | |
261 | ||
262 | u32 phy_id; | |
263 | ||
264 | enum phy_state state; | |
265 | ||
266 | u32 dev_flags; | |
267 | ||
e8a2b6a4 AF |
268 | phy_interface_t interface; |
269 | ||
00db8189 AF |
270 | /* Bus address of the PHY (0-32) */ |
271 | int addr; | |
272 | ||
c5e38a94 AF |
273 | /* |
274 | * forced speed & duplex (no autoneg) | |
00db8189 AF |
275 | * partner speed & duplex & pause (autoneg) |
276 | */ | |
277 | int speed; | |
278 | int duplex; | |
279 | int pause; | |
280 | int asym_pause; | |
281 | ||
282 | /* The most recently read link state */ | |
283 | int link; | |
284 | ||
285 | /* Enabled Interrupts */ | |
286 | u32 interrupts; | |
287 | ||
288 | /* Union of PHY and Attached devices' supported modes */ | |
289 | /* See mii.h for more info */ | |
290 | u32 supported; | |
291 | u32 advertising; | |
292 | ||
293 | int autoneg; | |
294 | ||
295 | int link_timeout; | |
296 | ||
c5e38a94 AF |
297 | /* |
298 | * Interrupt number for this PHY | |
299 | * -1 means no interrupt | |
300 | */ | |
00db8189 AF |
301 | int irq; |
302 | ||
303 | /* private data pointer */ | |
304 | /* For use by PHYs to maintain extra state */ | |
305 | void *priv; | |
306 | ||
307 | /* Interrupt and Polling infrastructure */ | |
308 | struct work_struct phy_queue; | |
35b5f6b1 | 309 | struct work_struct state_queue; |
00db8189 | 310 | struct timer_list phy_timer; |
0ac49527 | 311 | atomic_t irq_disable; |
00db8189 | 312 | |
35b5f6b1 | 313 | struct mutex lock; |
00db8189 AF |
314 | |
315 | struct net_device *attached_dev; | |
316 | ||
317 | void (*adjust_link)(struct net_device *dev); | |
318 | ||
319 | void (*adjust_state)(struct net_device *dev); | |
320 | }; | |
321 | #define to_phy_device(d) container_of(d, struct phy_device, dev) | |
322 | ||
323 | /* struct phy_driver: Driver structure for a particular PHY type | |
324 | * | |
325 | * phy_id: The result of reading the UID registers of this PHY | |
326 | * type, and ANDing them with the phy_id_mask. This driver | |
327 | * only works for PHYs with IDs which match this field | |
328 | * name: The friendly name of this PHY type | |
329 | * phy_id_mask: Defines the important bits of the phy_id | |
330 | * features: A list of features (speed, duplex, etc) supported | |
331 | * by this PHY | |
332 | * flags: A bitfield defining certain other features this PHY | |
333 | * supports (like interrupts) | |
334 | * | |
335 | * The drivers must implement config_aneg and read_status. All | |
336 | * other functions are optional. Note that none of these | |
337 | * functions should be called from interrupt time. The goal is | |
338 | * for the bus read/write functions to be able to block when the | |
339 | * bus transaction is happening, and be freed up by an interrupt | |
340 | * (The MPC85xx has this ability, though it is not currently | |
341 | * supported in the driver). | |
342 | */ | |
343 | struct phy_driver { | |
344 | u32 phy_id; | |
345 | char *name; | |
346 | unsigned int phy_id_mask; | |
347 | u32 features; | |
348 | u32 flags; | |
349 | ||
c5e38a94 AF |
350 | /* |
351 | * Called to initialize the PHY, | |
352 | * including after a reset | |
353 | */ | |
00db8189 AF |
354 | int (*config_init)(struct phy_device *phydev); |
355 | ||
c5e38a94 AF |
356 | /* |
357 | * Called during discovery. Used to set | |
358 | * up device-specific structures, if any | |
359 | */ | |
00db8189 AF |
360 | int (*probe)(struct phy_device *phydev); |
361 | ||
362 | /* PHY Power Management */ | |
363 | int (*suspend)(struct phy_device *phydev); | |
364 | int (*resume)(struct phy_device *phydev); | |
365 | ||
c5e38a94 AF |
366 | /* |
367 | * Configures the advertisement and resets | |
00db8189 AF |
368 | * autonegotiation if phydev->autoneg is on, |
369 | * forces the speed to the current settings in phydev | |
c5e38a94 AF |
370 | * if phydev->autoneg is off |
371 | */ | |
00db8189 AF |
372 | int (*config_aneg)(struct phy_device *phydev); |
373 | ||
374 | /* Determines the negotiated speed and duplex */ | |
375 | int (*read_status)(struct phy_device *phydev); | |
376 | ||
377 | /* Clears any pending interrupts */ | |
378 | int (*ack_interrupt)(struct phy_device *phydev); | |
379 | ||
380 | /* Enables or disables interrupts */ | |
381 | int (*config_intr)(struct phy_device *phydev); | |
382 | ||
383 | /* Clears up any memory if needed */ | |
384 | void (*remove)(struct phy_device *phydev); | |
385 | ||
386 | struct device_driver driver; | |
387 | }; | |
388 | #define to_phy_driver(d) container_of(d, struct phy_driver, driver) | |
389 | ||
f62220d3 AF |
390 | #define PHY_ANY_ID "MATCH ANY PHY" |
391 | #define PHY_ANY_UID 0xffffffff | |
392 | ||
393 | /* A Structure for boards to register fixups with the PHY Lib */ | |
394 | struct phy_fixup { | |
395 | struct list_head list; | |
396 | char bus_id[BUS_ID_SIZE]; | |
397 | u32 phy_uid; | |
398 | u32 phy_uid_mask; | |
399 | int (*run)(struct phy_device *phydev); | |
400 | }; | |
401 | ||
00db8189 AF |
402 | int phy_read(struct phy_device *phydev, u16 regnum); |
403 | int phy_write(struct phy_device *phydev, u16 regnum, u16 val); | |
cac1f3c8 | 404 | int get_phy_id(struct mii_bus *bus, int addr, u32 *phy_id); |
00db8189 AF |
405 | struct phy_device* get_phy_device(struct mii_bus *bus, int addr); |
406 | int phy_clear_interrupt(struct phy_device *phydev); | |
407 | int phy_config_interrupt(struct phy_device *phydev, u32 interrupts); | |
e1393456 | 408 | struct phy_device * phy_attach(struct net_device *dev, |
f62220d3 AF |
409 | const char *bus_id, u32 flags, phy_interface_t interface); |
410 | struct phy_device * phy_connect(struct net_device *dev, const char *bus_id, | |
e8a2b6a4 AF |
411 | void (*handler)(struct net_device *), u32 flags, |
412 | phy_interface_t interface); | |
e1393456 AF |
413 | void phy_disconnect(struct phy_device *phydev); |
414 | void phy_detach(struct phy_device *phydev); | |
415 | void phy_start(struct phy_device *phydev); | |
416 | void phy_stop(struct phy_device *phydev); | |
417 | int phy_start_aneg(struct phy_device *phydev); | |
418 | ||
298cf9be | 419 | struct mii_bus *mdiobus_alloc(void); |
e1393456 AF |
420 | int mdiobus_register(struct mii_bus *bus); |
421 | void mdiobus_unregister(struct mii_bus *bus); | |
298cf9be | 422 | void mdiobus_free(struct mii_bus *bus); |
4fd5f812 LB |
423 | struct phy_device *mdiobus_scan(struct mii_bus *bus, int addr); |
424 | ||
e1393456 AF |
425 | void phy_sanitize_settings(struct phy_device *phydev); |
426 | int phy_stop_interrupts(struct phy_device *phydev); | |
9b9a8bfc AF |
427 | int phy_enable_interrupts(struct phy_device *phydev); |
428 | int phy_disable_interrupts(struct phy_device *phydev); | |
00db8189 AF |
429 | |
430 | static inline int phy_read_status(struct phy_device *phydev) { | |
431 | return phydev->drv->read_status(phydev); | |
432 | } | |
433 | ||
e1393456 | 434 | int genphy_config_advert(struct phy_device *phydev); |
00db8189 AF |
435 | int genphy_setup_forced(struct phy_device *phydev); |
436 | int genphy_restart_aneg(struct phy_device *phydev); | |
437 | int genphy_config_aneg(struct phy_device *phydev); | |
438 | int genphy_update_link(struct phy_device *phydev); | |
439 | int genphy_read_status(struct phy_device *phydev); | |
440 | void phy_driver_unregister(struct phy_driver *drv); | |
441 | int phy_driver_register(struct phy_driver *new_driver); | |
442 | void phy_prepare_link(struct phy_device *phydev, | |
443 | void (*adjust_link)(struct net_device *)); | |
444 | void phy_start_machine(struct phy_device *phydev, | |
445 | void (*handler)(struct net_device *)); | |
446 | void phy_stop_machine(struct phy_device *phydev); | |
447 | int phy_ethtool_sset(struct phy_device *phydev, struct ethtool_cmd *cmd); | |
448 | int phy_ethtool_gset(struct phy_device *phydev, struct ethtool_cmd *cmd); | |
449 | int phy_mii_ioctl(struct phy_device *phydev, | |
450 | struct mii_ioctl_data *mii_data, int cmd); | |
e1393456 AF |
451 | int phy_start_interrupts(struct phy_device *phydev); |
452 | void phy_print_status(struct phy_device *phydev); | |
11b0bacd | 453 | struct phy_device* phy_device_create(struct mii_bus *bus, int addr, int phy_id); |
6f4a7f41 | 454 | void phy_device_free(struct phy_device *phydev); |
00db8189 | 455 | |
f62220d3 AF |
456 | int phy_register_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask, |
457 | int (*run)(struct phy_device *)); | |
458 | int phy_register_fixup_for_id(const char *bus_id, | |
459 | int (*run)(struct phy_device *)); | |
460 | int phy_register_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask, | |
461 | int (*run)(struct phy_device *)); | |
462 | int phy_scan_fixups(struct phy_device *phydev); | |
463 | ||
9b9a8bfc AF |
464 | int __init mdio_bus_init(void); |
465 | void mdio_bus_exit(void); | |
466 | ||
00db8189 | 467 | extern struct bus_type mdio_bus_type; |
00db8189 | 468 | #endif /* __PHY_H */ |