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TOMOYO Linux Cross Reference
Linux/include/linux/phy.h

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  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/ethtool.h>
 23 #include <linux/mii.h>
 24 #include <linux/timer.h>
 25 #include <linux/workqueue.h>
 26 #include <linux/mod_devicetable.h>
 27 
 28 #include <linux/atomic.h>
 29 
 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 
 42 /*
 43  * Set phydev->irq to PHY_POLL if interrupts are not supported,
 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 #define PHY_IS_INTERNAL         0x00000004
 53 
 54 /* Interface Mode definitions */
 55 typedef enum {
 56         PHY_INTERFACE_MODE_NA,
 57         PHY_INTERFACE_MODE_MII,
 58         PHY_INTERFACE_MODE_GMII,
 59         PHY_INTERFACE_MODE_SGMII,
 60         PHY_INTERFACE_MODE_TBI,
 61         PHY_INTERFACE_MODE_REVMII,
 62         PHY_INTERFACE_MODE_RMII,
 63         PHY_INTERFACE_MODE_RGMII,
 64         PHY_INTERFACE_MODE_RGMII_ID,
 65         PHY_INTERFACE_MODE_RGMII_RXID,
 66         PHY_INTERFACE_MODE_RGMII_TXID,
 67         PHY_INTERFACE_MODE_RTBI,
 68         PHY_INTERFACE_MODE_SMII,
 69 } phy_interface_t;
 70 
 71 
 72 #define PHY_INIT_TIMEOUT        100000
 73 #define PHY_STATE_TIME          1
 74 #define PHY_FORCE_TIMEOUT       10
 75 #define PHY_AN_TIMEOUT          10
 76 
 77 #define PHY_MAX_ADDR    32
 78 
 79 /* Used when trying to connect to a specific phy (mii bus id:phy device id) */
 80 #define PHY_ID_FMT "%s:%02x"
 81 
 82 /*
 83  * Need to be a little smaller than phydev->dev.bus_id to leave room
 84  * for the ":%02x"
 85  */
 86 #define MII_BUS_ID_SIZE (20 - 3)
 87 
 88 /* Or MII_ADDR_C45 into regnum for read/write on mii_bus to enable the 21 bit
 89    IEEE 802.3ae clause 45 addressing mode used by 10GIGE phy chips. */
 90 #define MII_ADDR_C45 (1<<30)
 91 
 92 struct device;
 93 struct sk_buff;
 94 
 95 /*
 96  * The Bus class for PHYs.  Devices which provide access to
 97  * PHYs should register using this structure
 98  */
 99 struct mii_bus {
100         const char *name;
101         char id[MII_BUS_ID_SIZE];
102         void *priv;
103         int (*read)(struct mii_bus *bus, int phy_id, int regnum);
104         int (*write)(struct mii_bus *bus, int phy_id, int regnum, u16 val);
105         int (*reset)(struct mii_bus *bus);
106 
107         /*
108          * A lock to ensure that only one thing can read/write
109          * the MDIO bus at a time
110          */
111         struct mutex mdio_lock;
112 
113         struct device *parent;
114         enum {
115                 MDIOBUS_ALLOCATED = 1,
116                 MDIOBUS_REGISTERED,
117                 MDIOBUS_UNREGISTERED,
118                 MDIOBUS_RELEASED,
119         } state;
120         struct device dev;
121 
122         /* list of all PHYs on bus */
123         struct phy_device *phy_map[PHY_MAX_ADDR];
124 
125         /* PHY addresses to be ignored when probing */
126         u32 phy_mask;
127 
128         /*
129          * Pointer to an array of interrupts, each PHY's
130          * interrupt at the index matching its address
131          */
132         int *irq;
133 };
134 #define to_mii_bus(d) container_of(d, struct mii_bus, dev)
135 
136 struct mii_bus *mdiobus_alloc_size(size_t);
137 static inline struct mii_bus *mdiobus_alloc(void)
138 {
139         return mdiobus_alloc_size(0);
140 }
141 
142 int mdiobus_register(struct mii_bus *bus);
143 void mdiobus_unregister(struct mii_bus *bus);
144 void mdiobus_free(struct mii_bus *bus);
145 struct phy_device *mdiobus_scan(struct mii_bus *bus, int addr);
146 int mdiobus_read(struct mii_bus *bus, int addr, u32 regnum);
147 int mdiobus_write(struct mii_bus *bus, int addr, u32 regnum, u16 val);
148 
149 
150 #define PHY_INTERRUPT_DISABLED  0x0
151 #define PHY_INTERRUPT_ENABLED   0x80000000
152 
153 /* PHY state machine states:
154  *
155  * DOWN: PHY device and driver are not ready for anything.  probe
156  * should be called if and only if the PHY is in this state,
157  * given that the PHY device exists.
158  * - PHY driver probe function will, depending on the PHY, set
159  * the state to STARTING or READY
160  *
161  * STARTING:  PHY device is coming up, and the ethernet driver is
162  * not ready.  PHY drivers may set this in the probe function.
163  * If they do, they are responsible for making sure the state is
164  * eventually set to indicate whether the PHY is UP or READY,
165  * depending on the state when the PHY is done starting up.
166  * - PHY driver will set the state to READY
167  * - start will set the state to PENDING
168  *
169  * READY: PHY is ready to send and receive packets, but the
170  * controller is not.  By default, PHYs which do not implement
171  * probe will be set to this state by phy_probe().  If the PHY
172  * driver knows the PHY is ready, and the PHY state is STARTING,
173  * then it sets this STATE.
174  * - start will set the state to UP
175  *
176  * PENDING: PHY device is coming up, but the ethernet driver is
177  * ready.  phy_start will set this state if the PHY state is
178  * STARTING.
179  * - PHY driver will set the state to UP when the PHY is ready
180  *
181  * UP: The PHY and attached device are ready to do work.
182  * Interrupts should be started here.
183  * - timer moves to AN
184  *
185  * AN: The PHY is currently negotiating the link state.  Link is
186  * therefore down for now.  phy_timer will set this state when it
187  * detects the state is UP.  config_aneg will set this state
188  * whenever called with phydev->autoneg set to AUTONEG_ENABLE.
189  * - If autonegotiation finishes, but there's no link, it sets
190  *   the state to NOLINK.
191  * - If aneg finishes with link, it sets the state to RUNNING,
192  *   and calls adjust_link
193  * - If autonegotiation did not finish after an arbitrary amount
194  *   of time, autonegotiation should be tried again if the PHY
195  *   supports "magic" autonegotiation (back to AN)
196  * - If it didn't finish, and no magic_aneg, move to FORCING.
197  *
198  * NOLINK: PHY is up, but not currently plugged in.
199  * - If the timer notes that the link comes back, we move to RUNNING
200  * - config_aneg moves to AN
201  * - phy_stop moves to HALTED
202  *
203  * FORCING: PHY is being configured with forced settings
204  * - if link is up, move to RUNNING
205  * - If link is down, we drop to the next highest setting, and
206  *   retry (FORCING) after a timeout
207  * - phy_stop moves to HALTED
208  *
209  * RUNNING: PHY is currently up, running, and possibly sending
210  * and/or receiving packets
211  * - timer will set CHANGELINK if we're polling (this ensures the
212  *   link state is polled every other cycle of this state machine,
213  *   which makes it every other second)
214  * - irq will set CHANGELINK
215  * - config_aneg will set AN
216  * - phy_stop moves to HALTED
217  *
218  * CHANGELINK: PHY experienced a change in link state
219  * - timer moves to RUNNING if link
220  * - timer moves to NOLINK if the link is down
221  * - phy_stop moves to HALTED
222  *
223  * HALTED: PHY is up, but no polling or interrupts are done. Or
224  * PHY is in an error state.
225  *
226  * - phy_start moves to RESUMING
227  *
228  * RESUMING: PHY was halted, but now wants to run again.
229  * - If we are forcing, or aneg is done, timer moves to RUNNING
230  * - If aneg is not done, timer moves to AN
231  * - phy_stop moves to HALTED
232  */
233 enum phy_state {
234         PHY_DOWN=0,
235         PHY_STARTING,
236         PHY_READY,
237         PHY_PENDING,
238         PHY_UP,
239         PHY_AN,
240         PHY_RUNNING,
241         PHY_NOLINK,
242         PHY_FORCING,
243         PHY_CHANGELINK,
244         PHY_HALTED,
245         PHY_RESUMING
246 };
247 
248 /**
249  * struct phy_c45_device_ids - 802.3-c45 Device Identifiers
250  * @devices_in_package: Bit vector of devices present.
251  * @device_ids: The device identifer for each present device.
252  */
253 struct phy_c45_device_ids {
254         u32 devices_in_package;
255         u32 device_ids[8];
256 };
257 
258 /* phy_device: An instance of a PHY
259  *
260  * drv: Pointer to the driver for this PHY instance
261  * bus: Pointer to the bus this PHY is on
262  * dev: driver model device structure for this PHY
263  * phy_id: UID for this device found during discovery
264  * c45_ids: 802.3-c45 Device Identifers if is_c45.
265  * is_c45:  Set to true if this phy uses clause 45 addressing.
266  * is_internal: Set to true if this phy is internal to a MAC.
267  * state: state of the PHY for management purposes
268  * dev_flags: Device-specific flags used by the PHY driver.
269  * addr: Bus address of PHY
270  * link_timeout: The number of timer firings to wait before the
271  * giving up on the current attempt at acquiring a link
272  * irq: IRQ number of the PHY's interrupt (-1 if none)
273  * phy_timer: The timer for handling the state machine
274  * phy_queue: A work_queue for the interrupt
275  * attached_dev: The attached enet driver's device instance ptr
276  * adjust_link: Callback for the enet controller to respond to
277  * changes in the link state.
278  * adjust_state: Callback for the enet driver to respond to
279  * changes in the state machine.
280  *
281  * speed, duplex, pause, supported, advertising, and
282  * autoneg are used like in mii_if_info
283  *
284  * interrupts currently only supports enabled or disabled,
285  * but could be changed in the future to support enabling
286  * and disabling specific interrupts
287  *
288  * Contains some infrastructure for polling and interrupt
289  * handling, as well as handling shifts in PHY hardware state
290  */
291 struct phy_device {
292         /* Information about the PHY type */
293         /* And management functions */
294         struct phy_driver *drv;
295 
296         struct mii_bus *bus;
297 
298         struct device dev;
299 
300         u32 phy_id;
301 
302         struct phy_c45_device_ids c45_ids;
303         bool is_c45;
304         bool is_internal;
305 
306         enum phy_state state;
307 
308         u32 dev_flags;
309 
310         phy_interface_t interface;
311 
312         /* Bus address of the PHY (0-31) */
313         int addr;
314 
315         /*
316          * forced speed & duplex (no autoneg)
317          * partner speed & duplex & pause (autoneg)
318          */
319         int speed;
320         int duplex;
321         int pause;
322         int asym_pause;
323 
324         /* The most recently read link state */
325         int link;
326 
327         /* Enabled Interrupts */
328         u32 interrupts;
329 
330         /* Union of PHY and Attached devices' supported modes */
331         /* See mii.h for more info */
332         u32 supported;
333         u32 advertising;
334 
335         int autoneg;
336 
337         int link_timeout;
338 
339         /*
340          * Interrupt number for this PHY
341          * -1 means no interrupt
342          */
343         int irq;
344 
345         /* private data pointer */
346         /* For use by PHYs to maintain extra state */
347         void *priv;
348 
349         /* Interrupt and Polling infrastructure */
350         struct work_struct phy_queue;
351         struct delayed_work state_queue;
352         atomic_t irq_disable;
353 
354         struct mutex lock;
355 
356         struct net_device *attached_dev;
357 
358         void (*adjust_link)(struct net_device *dev);
359 
360         void (*adjust_state)(struct net_device *dev);
361 };
362 #define to_phy_device(d) container_of(d, struct phy_device, dev)
363 
364 /* struct phy_driver: Driver structure for a particular PHY type
365  *
366  * phy_id: The result of reading the UID registers of this PHY
367  *   type, and ANDing them with the phy_id_mask.  This driver
368  *   only works for PHYs with IDs which match this field
369  * name: The friendly name of this PHY type
370  * phy_id_mask: Defines the important bits of the phy_id
371  * features: A list of features (speed, duplex, etc) supported
372  *   by this PHY
373  * flags: A bitfield defining certain other features this PHY
374  *   supports (like interrupts)
375  *
376  * The drivers must implement config_aneg and read_status.  All
377  * other functions are optional. Note that none of these
378  * functions should be called from interrupt time.  The goal is
379  * for the bus read/write functions to be able to block when the
380  * bus transaction is happening, and be freed up by an interrupt
381  * (The MPC85xx has this ability, though it is not currently
382  * supported in the driver).
383  */
384 struct phy_driver {
385         u32 phy_id;
386         char *name;
387         unsigned int phy_id_mask;
388         u32 features;
389         u32 flags;
390 
391         /*
392          * Called to initialize the PHY,
393          * including after a reset
394          */
395         int (*config_init)(struct phy_device *phydev);
396 
397         /*
398          * Called during discovery.  Used to set
399          * up device-specific structures, if any
400          */
401         int (*probe)(struct phy_device *phydev);
402 
403         /* PHY Power Management */
404         int (*suspend)(struct phy_device *phydev);
405         int (*resume)(struct phy_device *phydev);
406 
407         /*
408          * Configures the advertisement and resets
409          * autonegotiation if phydev->autoneg is on,
410          * forces the speed to the current settings in phydev
411          * if phydev->autoneg is off
412          */
413         int (*config_aneg)(struct phy_device *phydev);
414 
415         /* Determines the negotiated speed and duplex */
416         int (*read_status)(struct phy_device *phydev);
417 
418         /* Clears any pending interrupts */
419         int (*ack_interrupt)(struct phy_device *phydev);
420 
421         /* Enables or disables interrupts */
422         int (*config_intr)(struct phy_device *phydev);
423 
424         /*
425          * Checks if the PHY generated an interrupt.
426          * For multi-PHY devices with shared PHY interrupt pin
427          */
428         int (*did_interrupt)(struct phy_device *phydev);
429 
430         /* Clears up any memory if needed */
431         void (*remove)(struct phy_device *phydev);
432 
433         /* Returns true if this is a suitable driver for the given
434          * phydev.  If NULL, matching is based on phy_id and
435          * phy_id_mask.
436          */
437         int (*match_phy_device)(struct phy_device *phydev);
438 
439         /* Handles ethtool queries for hardware time stamping. */
440         int (*ts_info)(struct phy_device *phydev, struct ethtool_ts_info *ti);
441 
442         /* Handles SIOCSHWTSTAMP ioctl for hardware time stamping. */
443         int  (*hwtstamp)(struct phy_device *phydev, struct ifreq *ifr);
444 
445         /*
446          * Requests a Rx timestamp for 'skb'. If the skb is accepted,
447          * the phy driver promises to deliver it using netif_rx() as
448          * soon as a timestamp becomes available. One of the
449          * PTP_CLASS_ values is passed in 'type'. The function must
450          * return true if the skb is accepted for delivery.
451          */
452         bool (*rxtstamp)(struct phy_device *dev, struct sk_buff *skb, int type);
453 
454         /*
455          * Requests a Tx timestamp for 'skb'. The phy driver promises
456          * to deliver it using skb_complete_tx_timestamp() as soon as a
457          * timestamp becomes available. One of the PTP_CLASS_ values
458          * is passed in 'type'.
459          */
460         void (*txtstamp)(struct phy_device *dev, struct sk_buff *skb, int type);
461 
462         /* Some devices (e.g. qnap TS-119P II) require PHY register changes to
463          * enable Wake on LAN, so set_wol is provided to be called in the
464          * ethernet driver's set_wol function. */
465         int (*set_wol)(struct phy_device *dev, struct ethtool_wolinfo *wol);
466 
467         /* See set_wol, but for checking whether Wake on LAN is enabled. */
468         void (*get_wol)(struct phy_device *dev, struct ethtool_wolinfo *wol);
469 
470         struct device_driver driver;
471 };
472 #define to_phy_driver(d) container_of(d, struct phy_driver, driver)
473 
474 #define PHY_ANY_ID "MATCH ANY PHY"
475 #define PHY_ANY_UID 0xffffffff
476 
477 /* A Structure for boards to register fixups with the PHY Lib */
478 struct phy_fixup {
479         struct list_head list;
480         char bus_id[20];
481         u32 phy_uid;
482         u32 phy_uid_mask;
483         int (*run)(struct phy_device *phydev);
484 };
485 
486 /**
487  * phy_read - Convenience function for reading a given PHY register
488  * @phydev: the phy_device struct
489  * @regnum: register number to read
490  *
491  * NOTE: MUST NOT be called from interrupt context,
492  * because the bus read/write functions may wait for an interrupt
493  * to conclude the operation.
494  */
495 static inline int phy_read(struct phy_device *phydev, u32 regnum)
496 {
497         return mdiobus_read(phydev->bus, phydev->addr, regnum);
498 }
499 
500 /**
501  * phy_write - Convenience function for writing a given PHY register
502  * @phydev: the phy_device struct
503  * @regnum: register number to write
504  * @val: value to write to @regnum
505  *
506  * NOTE: MUST NOT be called from interrupt context,
507  * because the bus read/write functions may wait for an interrupt
508  * to conclude the operation.
509  */
510 static inline int phy_write(struct phy_device *phydev, u32 regnum, u16 val)
511 {
512         return mdiobus_write(phydev->bus, phydev->addr, regnum, val);
513 }
514 
515 /**
516  * phy_interrupt_is_valid - Convenience function for testing a given PHY irq
517  * @phydev: the phy_device struct
518  *
519  * NOTE: must be kept in sync with addition/removal of PHY_POLL and
520  * PHY_IGNORE_INTERRUPT
521  */
522 static inline bool phy_interrupt_is_valid(struct phy_device *phydev)
523 {
524         return phydev->irq != PHY_POLL && phydev->irq != PHY_IGNORE_INTERRUPT;
525 }
526 
527 /**
528  * phy_is_internal - Convenience function for testing if a PHY is internal
529  * @phydev: the phy_device struct
530  */
531 static inline bool phy_is_internal(struct phy_device *phydev)
532 {
533         return phydev->is_internal;
534 }
535 
536 struct phy_device *phy_device_create(struct mii_bus *bus, int addr, int phy_id,
537                 bool is_c45, struct phy_c45_device_ids *c45_ids);
538 struct phy_device *get_phy_device(struct mii_bus *bus, int addr, bool is_c45);
539 int phy_device_register(struct phy_device *phy);
540 int phy_init_hw(struct phy_device *phydev);
541 struct phy_device * phy_attach(struct net_device *dev,
542                 const char *bus_id, phy_interface_t interface);
543 struct phy_device *phy_find_first(struct mii_bus *bus);
544 int phy_connect_direct(struct net_device *dev, struct phy_device *phydev,
545                 void (*handler)(struct net_device *),
546                 phy_interface_t interface);
547 struct phy_device * phy_connect(struct net_device *dev, const char *bus_id,
548                 void (*handler)(struct net_device *),
549                 phy_interface_t interface);
550 void phy_disconnect(struct phy_device *phydev);
551 void phy_detach(struct phy_device *phydev);
552 void phy_start(struct phy_device *phydev);
553 void phy_stop(struct phy_device *phydev);
554 int phy_start_aneg(struct phy_device *phydev);
555 
556 int phy_stop_interrupts(struct phy_device *phydev);
557 
558 static inline int phy_read_status(struct phy_device *phydev) {
559         return phydev->drv->read_status(phydev);
560 }
561 
562 int genphy_restart_aneg(struct phy_device *phydev);
563 int genphy_config_aneg(struct phy_device *phydev);
564 int genphy_update_link(struct phy_device *phydev);
565 int genphy_read_status(struct phy_device *phydev);
566 int genphy_suspend(struct phy_device *phydev);
567 int genphy_resume(struct phy_device *phydev);
568 void phy_driver_unregister(struct phy_driver *drv);
569 void phy_drivers_unregister(struct phy_driver *drv, int n);
570 int phy_driver_register(struct phy_driver *new_driver);
571 int phy_drivers_register(struct phy_driver *new_driver, int n);
572 void phy_state_machine(struct work_struct *work);
573 void phy_change(struct work_struct *work);
574 void phy_mac_interrupt(struct phy_device *phydev, int new_link);
575 void phy_start_machine(struct phy_device *phydev,
576                 void (*handler)(struct net_device *));
577 void phy_stop_machine(struct phy_device *phydev);
578 int phy_ethtool_sset(struct phy_device *phydev, struct ethtool_cmd *cmd);
579 int phy_ethtool_gset(struct phy_device *phydev, struct ethtool_cmd *cmd);
580 int phy_mii_ioctl(struct phy_device *phydev,
581                 struct ifreq *ifr, int cmd);
582 int phy_start_interrupts(struct phy_device *phydev);
583 void phy_print_status(struct phy_device *phydev);
584 void phy_device_free(struct phy_device *phydev);
585 
586 int phy_register_fixup(const char *bus_id, u32 phy_uid, u32 phy_uid_mask,
587                 int (*run)(struct phy_device *));
588 int phy_register_fixup_for_id(const char *bus_id,
589                 int (*run)(struct phy_device *));
590 int phy_register_fixup_for_uid(u32 phy_uid, u32 phy_uid_mask,
591                 int (*run)(struct phy_device *));
592 int phy_scan_fixups(struct phy_device *phydev);
593 
594 int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable);
595 int phy_get_eee_err(struct phy_device *phydev);
596 int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data);
597 int phy_ethtool_get_eee(struct phy_device *phydev, struct ethtool_eee *data);
598 int phy_ethtool_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol);
599 void phy_ethtool_get_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol);
600 
601 int __init mdio_bus_init(void);
602 void mdio_bus_exit(void);
603 
604 extern struct bus_type mdio_bus_type;
605 #endif /* __PHY_H */
606 

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