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1da177e4 LT |
1 | /* |
2 | * Any part of this program may be used in documents licensed under | |
3 | * the GNU Free Documentation License, Version 1.1 or any later version | |
4 | * published by the Free Software Foundation. | |
5 | */ | |
1da177e4 LT |
6 | #ifndef _PARPORT_H_ |
7 | #define _PARPORT_H_ | |
8 | ||
1da177e4 | 9 | |
1da177e4 LT |
10 | #include <linux/jiffies.h> |
11 | #include <linux/proc_fs.h> | |
12 | #include <linux/spinlock.h> | |
13 | #include <linux/wait.h> | |
3f2e40df | 14 | #include <linux/irqreturn.h> |
6188e10d | 15 | #include <linux/semaphore.h> |
6fa45a22 | 16 | #include <linux/device.h> |
1da177e4 | 17 | #include <asm/ptrace.h> |
607ca46e | 18 | #include <uapi/linux/parport.h> |
1da177e4 LT |
19 | |
20 | /* Define this later. */ | |
21 | struct parport; | |
22 | struct pardevice; | |
23 | ||
24 | struct pc_parport_state { | |
25 | unsigned int ctr; | |
26 | unsigned int ecr; | |
27 | }; | |
28 | ||
29 | struct ax_parport_state { | |
30 | unsigned int ctr; | |
31 | unsigned int ecr; | |
32 | unsigned int dcsr; | |
33 | }; | |
34 | ||
35 | /* used by both parport_amiga and parport_mfc3 */ | |
36 | struct amiga_parport_state { | |
37 | unsigned char data; /* ciaa.prb */ | |
38 | unsigned char datadir; /* ciaa.ddrb */ | |
39 | unsigned char status; /* ciab.pra & 7 */ | |
40 | unsigned char statusdir;/* ciab.ddrb & 7 */ | |
41 | }; | |
42 | ||
ad4063b0 BD |
43 | struct ax88796_parport_state { |
44 | unsigned char cpr; | |
45 | }; | |
46 | ||
8e75f744 AG |
47 | struct ip32_parport_state { |
48 | unsigned int dcr; | |
49 | unsigned int ecr; | |
50 | }; | |
51 | ||
1da177e4 LT |
52 | struct parport_state { |
53 | union { | |
54 | struct pc_parport_state pc; | |
55 | /* ARC has no state. */ | |
56 | struct ax_parport_state ax; | |
57 | struct amiga_parport_state amiga; | |
ad4063b0 | 58 | struct ax88796_parport_state ax88796; |
1da177e4 | 59 | /* Atari has not state. */ |
8e75f744 | 60 | struct ip32_parport_state ip32; |
1da177e4 LT |
61 | void *misc; |
62 | } u; | |
63 | }; | |
64 | ||
65 | struct parport_operations { | |
66 | /* IBM PC-style virtual registers. */ | |
67 | void (*write_data)(struct parport *, unsigned char); | |
68 | unsigned char (*read_data)(struct parport *); | |
69 | ||
70 | void (*write_control)(struct parport *, unsigned char); | |
71 | unsigned char (*read_control)(struct parport *); | |
72 | unsigned char (*frob_control)(struct parport *, unsigned char mask, | |
73 | unsigned char val); | |
74 | ||
75 | unsigned char (*read_status)(struct parport *); | |
76 | ||
77 | /* IRQs. */ | |
78 | void (*enable_irq)(struct parport *); | |
79 | void (*disable_irq)(struct parport *); | |
80 | ||
81 | /* Data direction. */ | |
82 | void (*data_forward) (struct parport *); | |
83 | void (*data_reverse) (struct parport *); | |
84 | ||
85 | /* For core parport code. */ | |
86 | void (*init_state)(struct pardevice *, struct parport_state *); | |
87 | void (*save_state)(struct parport *, struct parport_state *); | |
88 | void (*restore_state)(struct parport *, struct parport_state *); | |
89 | ||
90 | /* Block read/write */ | |
91 | size_t (*epp_write_data) (struct parport *port, const void *buf, | |
92 | size_t len, int flags); | |
93 | size_t (*epp_read_data) (struct parport *port, void *buf, size_t len, | |
94 | int flags); | |
95 | size_t (*epp_write_addr) (struct parport *port, const void *buf, | |
96 | size_t len, int flags); | |
97 | size_t (*epp_read_addr) (struct parport *port, void *buf, size_t len, | |
98 | int flags); | |
99 | ||
100 | size_t (*ecp_write_data) (struct parport *port, const void *buf, | |
101 | size_t len, int flags); | |
102 | size_t (*ecp_read_data) (struct parport *port, void *buf, size_t len, | |
103 | int flags); | |
104 | size_t (*ecp_write_addr) (struct parport *port, const void *buf, | |
105 | size_t len, int flags); | |
106 | ||
107 | size_t (*compat_write_data) (struct parport *port, const void *buf, | |
108 | size_t len, int flags); | |
109 | size_t (*nibble_read_data) (struct parport *port, void *buf, | |
110 | size_t len, int flags); | |
111 | size_t (*byte_read_data) (struct parport *port, void *buf, | |
112 | size_t len, int flags); | |
113 | struct module *owner; | |
114 | }; | |
115 | ||
116 | struct parport_device_info { | |
117 | parport_device_class class; | |
118 | const char *class_name; | |
119 | const char *mfr; | |
120 | const char *model; | |
121 | const char *cmdset; | |
122 | const char *description; | |
123 | }; | |
124 | ||
125 | /* Each device can have two callback functions: | |
126 | * 1) a preemption function, called by the resource manager to request | |
127 | * that the driver relinquish control of the port. The driver should | |
128 | * return zero if it agrees to release the port, and nonzero if it | |
129 | * refuses. Do not call parport_release() - the kernel will do this | |
130 | * implicitly. | |
131 | * | |
132 | * 2) a wake-up function, called by the resource manager to tell drivers | |
133 | * that the port is available to be claimed. If a driver wants to use | |
134 | * the port, it should call parport_claim() here. | |
135 | */ | |
136 | ||
137 | /* A parallel port device */ | |
138 | struct pardevice { | |
139 | const char *name; | |
140 | struct parport *port; | |
141 | int daisy; | |
142 | int (*preempt)(void *); | |
143 | void (*wakeup)(void *); | |
144 | void *private; | |
5712cb3d | 145 | void (*irq_func)(void *); |
1da177e4 LT |
146 | unsigned int flags; |
147 | struct pardevice *next; | |
148 | struct pardevice *prev; | |
6fa45a22 SM |
149 | struct device dev; |
150 | bool devmodel; | |
1da177e4 LT |
151 | struct parport_state *state; /* saved status over preemption */ |
152 | wait_queue_head_t wait_q; | |
153 | unsigned long int time; | |
154 | unsigned long int timeslice; | |
155 | volatile long int timeout; | |
156 | unsigned long waiting; /* long req'd for set_bit --RR */ | |
157 | struct pardevice *waitprev; | |
158 | struct pardevice *waitnext; | |
159 | void * sysctl_table; | |
160 | }; | |
161 | ||
6fa45a22 SM |
162 | #define to_pardevice(n) container_of(n, struct pardevice, dev) |
163 | ||
1da177e4 LT |
164 | /* IEEE1284 information */ |
165 | ||
d8a33496 MK |
166 | /* IEEE1284 phases. These are exposed to userland through ppdev IOCTL |
167 | * PP[GS]ETPHASE, so do not change existing values. */ | |
1da177e4 LT |
168 | enum ieee1284_phase { |
169 | IEEE1284_PH_FWD_DATA, | |
170 | IEEE1284_PH_FWD_IDLE, | |
171 | IEEE1284_PH_TERMINATE, | |
172 | IEEE1284_PH_NEGOTIATION, | |
d8a33496 | 173 | IEEE1284_PH_HBUSY_DNA, |
1da177e4 LT |
174 | IEEE1284_PH_REV_IDLE, |
175 | IEEE1284_PH_HBUSY_DAVAIL, | |
176 | IEEE1284_PH_REV_DATA, | |
177 | IEEE1284_PH_ECP_SETUP, | |
178 | IEEE1284_PH_ECP_FWD_TO_REV, | |
179 | IEEE1284_PH_ECP_REV_TO_FWD, | |
180 | IEEE1284_PH_ECP_DIR_UNKNOWN, | |
181 | }; | |
182 | struct ieee1284_info { | |
183 | int mode; | |
184 | volatile enum ieee1284_phase phase; | |
185 | struct semaphore irq; | |
186 | }; | |
187 | ||
188 | /* A parallel port */ | |
189 | struct parport { | |
190 | unsigned long base; /* base address */ | |
191 | unsigned long base_hi; /* base address (hi - ECR) */ | |
192 | unsigned int size; /* IO extent */ | |
193 | const char *name; | |
194 | unsigned int modes; | |
195 | int irq; /* interrupt (or -1 for none) */ | |
196 | int dma; | |
197 | int muxport; /* which muxport (if any) this is */ | |
198 | int portnum; /* which physical parallel port (not mux) */ | |
c15a3837 DB |
199 | struct device *dev; /* Physical device associated with IO/DMA. |
200 | * This may unfortulately be null if the | |
201 | * port has a legacy driver. | |
202 | */ | |
6fa45a22 | 203 | struct device bus_dev; /* to link with the bus */ |
1da177e4 LT |
204 | struct parport *physport; |
205 | /* If this is a non-default mux | |
206 | parport, i.e. we're a clone of a real | |
207 | physical port, this is a pointer to that | |
208 | port. The locking is only done in the | |
209 | real port. For a clone port, the | |
210 | following structure members are | |
211 | meaningless: devices, cad, muxsel, | |
212 | waithead, waittail, flags, pdir, | |
c15a3837 | 213 | dev, ieee1284, *_lock. |
1da177e4 LT |
214 | |
215 | It this is a default mux parport, or | |
216 | there is no mux involved, this points to | |
217 | ourself. */ | |
218 | ||
219 | struct pardevice *devices; | |
220 | struct pardevice *cad; /* port owner */ | |
221 | int daisy; /* currently selected daisy addr */ | |
222 | int muxsel; /* currently selected mux port */ | |
223 | ||
224 | struct pardevice *waithead; | |
225 | struct pardevice *waittail; | |
c15a3837 | 226 | |
1da177e4 LT |
227 | struct list_head list; |
228 | unsigned int flags; | |
229 | ||
230 | void *sysctl_table; | |
231 | struct parport_device_info probe_info[5]; /* 0-3 + non-IEEE1284.3 */ | |
232 | struct ieee1284_info ieee1284; | |
233 | ||
234 | struct parport_operations *ops; | |
235 | void *private_data; /* for lowlevel driver */ | |
236 | ||
237 | int number; /* port index - the `n' in `parportn' */ | |
238 | spinlock_t pardevice_lock; | |
239 | spinlock_t waitlist_lock; | |
240 | rwlock_t cad_lock; | |
241 | ||
242 | int spintime; | |
243 | atomic_t ref_count; | |
244 | ||
05ad709d AC |
245 | unsigned long devflags; |
246 | #define PARPORT_DEVPROC_REGISTERED 0 | |
247 | struct pardevice *proc_device; /* Currently register proc device */ | |
248 | ||
1da177e4 LT |
249 | struct list_head full_list; |
250 | struct parport *slaves[3]; | |
251 | }; | |
252 | ||
6fa45a22 SM |
253 | #define to_parport_dev(n) container_of(n, struct parport, bus_dev) |
254 | ||
1da177e4 LT |
255 | #define DEFAULT_SPIN_TIME 500 /* us */ |
256 | ||
257 | struct parport_driver { | |
258 | const char *name; | |
259 | void (*attach) (struct parport *); | |
260 | void (*detach) (struct parport *); | |
6fa45a22 SM |
261 | void (*match_port)(struct parport *); |
262 | int (*probe)(struct pardevice *); | |
263 | struct device_driver driver; | |
264 | bool devmodel; | |
1da177e4 LT |
265 | struct list_head list; |
266 | }; | |
267 | ||
6fa45a22 SM |
268 | #define to_parport_driver(n) container_of(n, struct parport_driver, driver) |
269 | ||
270 | int parport_bus_init(void); | |
271 | void parport_bus_exit(void); | |
272 | ||
1da177e4 LT |
273 | /* parport_register_port registers a new parallel port at the given |
274 | address (if one does not already exist) and returns a pointer to it. | |
275 | This entails claiming the I/O region, IRQ and DMA. NULL is returned | |
276 | if initialisation fails. */ | |
277 | struct parport *parport_register_port(unsigned long base, int irq, int dma, | |
278 | struct parport_operations *ops); | |
279 | ||
280 | /* Once a registered port is ready for high-level drivers to use, the | |
281 | low-level driver that registered it should announce it. This will | |
282 | call the high-level drivers' attach() functions (after things like | |
283 | determining the IEEE 1284.3 topology of the port and collecting | |
284 | DeviceIDs). */ | |
285 | void parport_announce_port (struct parport *port); | |
286 | ||
287 | /* Unregister a port. */ | |
288 | extern void parport_remove_port(struct parport *port); | |
289 | ||
290 | /* Register a new high-level driver. */ | |
6fa45a22 SM |
291 | |
292 | int __must_check __parport_register_driver(struct parport_driver *, | |
293 | struct module *, | |
294 | const char *mod_name); | |
295 | /* | |
296 | * parport_register_driver must be a macro so that KBUILD_MODNAME can | |
297 | * be expanded | |
298 | */ | |
299 | #define parport_register_driver(driver) \ | |
300 | __parport_register_driver(driver, THIS_MODULE, KBUILD_MODNAME) | |
1da177e4 LT |
301 | |
302 | /* Unregister a high-level driver. */ | |
303 | extern void parport_unregister_driver (struct parport_driver *); | |
6fa45a22 | 304 | void parport_unregister_driver(struct parport_driver *); |
1da177e4 LT |
305 | |
306 | /* If parport_register_driver doesn't fit your needs, perhaps | |
307 | * parport_find_xxx does. */ | |
308 | extern struct parport *parport_find_number (int); | |
309 | extern struct parport *parport_find_base (unsigned long); | |
310 | ||
3f2e40df JG |
311 | /* generic irq handler, if it suits your needs */ |
312 | extern irqreturn_t parport_irq_handler(int irq, void *dev_id); | |
313 | ||
1da177e4 LT |
314 | /* Reference counting for ports. */ |
315 | extern struct parport *parport_get_port (struct parport *); | |
316 | extern void parport_put_port (struct parport *); | |
6fa45a22 SM |
317 | void parport_del_port(struct parport *); |
318 | ||
319 | struct pardev_cb { | |
320 | int (*preempt)(void *); | |
321 | void (*wakeup)(void *); | |
322 | void *private; | |
323 | void (*irq_func)(void *); | |
324 | unsigned int flags; | |
325 | }; | |
1da177e4 LT |
326 | |
327 | /* parport_register_device declares that a device is connected to a | |
328 | port, and tells the kernel all it needs to know. | |
329 | - pf is the preemption function (may be NULL for no callback) | |
330 | - kf is the wake-up function (may be NULL for no callback) | |
331 | - irq_func is the interrupt handler (may be NULL for no interrupts) | |
332 | - handle is a user pointer that gets handed to callback functions. */ | |
333 | struct pardevice *parport_register_device(struct parport *port, | |
334 | const char *name, | |
335 | int (*pf)(void *), void (*kf)(void *), | |
5712cb3d | 336 | void (*irq_func)(void *), |
1da177e4 LT |
337 | int flags, void *handle); |
338 | ||
6fa45a22 SM |
339 | struct pardevice * |
340 | parport_register_dev_model(struct parport *port, const char *name, | |
341 | const struct pardev_cb *par_dev_cb, int cnt); | |
342 | ||
1da177e4 LT |
343 | /* parport_unregister unlinks a device from the chain. */ |
344 | extern void parport_unregister_device(struct pardevice *dev); | |
345 | ||
346 | /* parport_claim tries to gain ownership of the port for a particular | |
347 | driver. This may fail (return non-zero) if another driver is busy. | |
348 | If this driver has registered an interrupt handler, it will be | |
349 | enabled. */ | |
350 | extern int parport_claim(struct pardevice *dev); | |
351 | ||
352 | /* parport_claim_or_block is the same, but sleeps if the port cannot | |
353 | be claimed. Return value is 1 if it slept, 0 normally and -errno | |
354 | on error. */ | |
355 | extern int parport_claim_or_block(struct pardevice *dev); | |
356 | ||
357 | /* parport_release reverses a previous parport_claim. This can never | |
358 | fail, though the effects are undefined (except that they are bad) | |
359 | if you didn't previously own the port. Once you have released the | |
360 | port you should make sure that neither your code nor the hardware | |
361 | on the port tries to initiate any communication without first | |
362 | re-claiming the port. If you mess with the port state (enabling | |
363 | ECP for example) you should clean up before releasing the port. */ | |
364 | ||
365 | extern void parport_release(struct pardevice *dev); | |
366 | ||
367 | /** | |
368 | * parport_yield - relinquish a parallel port temporarily | |
369 | * @dev: a device on the parallel port | |
370 | * | |
371 | * This function relinquishes the port if it would be helpful to other | |
372 | * drivers to do so. Afterwards it tries to reclaim the port using | |
373 | * parport_claim(), and the return value is the same as for | |
374 | * parport_claim(). If it fails, the port is left unclaimed and it is | |
375 | * the driver's responsibility to reclaim the port. | |
376 | * | |
377 | * The parport_yield() and parport_yield_blocking() functions are for | |
378 | * marking points in the driver at which other drivers may claim the | |
379 | * port and use their devices. Yielding the port is similar to | |
380 | * releasing it and reclaiming it, but is more efficient because no | |
381 | * action is taken if there are no other devices needing the port. In | |
382 | * fact, nothing is done even if there are other devices waiting but | |
383 | * the current device is still within its "timeslice". The default | |
384 | * timeslice is half a second, but it can be adjusted via the /proc | |
385 | * interface. | |
386 | **/ | |
387 | static __inline__ int parport_yield(struct pardevice *dev) | |
388 | { | |
389 | unsigned long int timeslip = (jiffies - dev->time); | |
390 | if ((dev->port->waithead == NULL) || (timeslip < dev->timeslice)) | |
391 | return 0; | |
392 | parport_release(dev); | |
393 | return parport_claim(dev); | |
394 | } | |
395 | ||
396 | /** | |
397 | * parport_yield_blocking - relinquish a parallel port temporarily | |
398 | * @dev: a device on the parallel port | |
399 | * | |
400 | * This function relinquishes the port if it would be helpful to other | |
401 | * drivers to do so. Afterwards it tries to reclaim the port using | |
402 | * parport_claim_or_block(), and the return value is the same as for | |
403 | * parport_claim_or_block(). | |
404 | **/ | |
405 | static __inline__ int parport_yield_blocking(struct pardevice *dev) | |
406 | { | |
407 | unsigned long int timeslip = (jiffies - dev->time); | |
408 | if ((dev->port->waithead == NULL) || (timeslip < dev->timeslice)) | |
409 | return 0; | |
410 | parport_release(dev); | |
411 | return parport_claim_or_block(dev); | |
412 | } | |
413 | ||
414 | /* Flags used to identify what a device does. */ | |
415 | #define PARPORT_DEV_TRAN 0 /* WARNING !! DEPRECATED !! */ | |
416 | #define PARPORT_DEV_LURK (1<<0) /* WARNING !! DEPRECATED !! */ | |
417 | #define PARPORT_DEV_EXCL (1<<1) /* Need exclusive access. */ | |
418 | ||
419 | #define PARPORT_FLAG_EXCL (1<<1) /* EXCL driver registered. */ | |
420 | ||
421 | /* IEEE1284 functions */ | |
f230d101 | 422 | extern void parport_ieee1284_interrupt (void *); |
1da177e4 LT |
423 | extern int parport_negotiate (struct parport *, int mode); |
424 | extern ssize_t parport_write (struct parport *, const void *buf, size_t len); | |
425 | extern ssize_t parport_read (struct parport *, void *buf, size_t len); | |
426 | ||
427 | #define PARPORT_INACTIVITY_O_NONBLOCK 1 | |
428 | extern long parport_set_timeout (struct pardevice *, long inactivity); | |
429 | ||
430 | extern int parport_wait_event (struct parport *, long timeout); | |
431 | extern int parport_wait_peripheral (struct parport *port, | |
432 | unsigned char mask, | |
433 | unsigned char val); | |
434 | extern int parport_poll_peripheral (struct parport *port, | |
435 | unsigned char mask, | |
436 | unsigned char val, | |
437 | int usec); | |
438 | ||
439 | /* For architectural drivers */ | |
440 | extern size_t parport_ieee1284_write_compat (struct parport *, | |
441 | const void *, size_t, int); | |
442 | extern size_t parport_ieee1284_read_nibble (struct parport *, | |
443 | void *, size_t, int); | |
444 | extern size_t parport_ieee1284_read_byte (struct parport *, | |
445 | void *, size_t, int); | |
446 | extern size_t parport_ieee1284_ecp_read_data (struct parport *, | |
447 | void *, size_t, int); | |
448 | extern size_t parport_ieee1284_ecp_write_data (struct parport *, | |
449 | const void *, size_t, int); | |
450 | extern size_t parport_ieee1284_ecp_write_addr (struct parport *, | |
451 | const void *, size_t, int); | |
452 | extern size_t parport_ieee1284_epp_write_data (struct parport *, | |
453 | const void *, size_t, int); | |
454 | extern size_t parport_ieee1284_epp_read_data (struct parport *, | |
455 | void *, size_t, int); | |
456 | extern size_t parport_ieee1284_epp_write_addr (struct parport *, | |
457 | const void *, size_t, int); | |
458 | extern size_t parport_ieee1284_epp_read_addr (struct parport *, | |
459 | void *, size_t, int); | |
460 | ||
461 | /* IEEE1284.3 functions */ | |
462 | extern int parport_daisy_init (struct parport *port); | |
463 | extern void parport_daisy_fini (struct parport *port); | |
5712cb3d | 464 | extern struct pardevice *parport_open (int devnum, const char *name); |
1da177e4 LT |
465 | extern void parport_close (struct pardevice *dev); |
466 | extern ssize_t parport_device_id (int devnum, char *buffer, size_t len); | |
1da177e4 LT |
467 | extern void parport_daisy_deselect_all (struct parport *port); |
468 | extern int parport_daisy_select (struct parport *port, int daisy, int mode); | |
469 | ||
470 | /* Lowlevel drivers _can_ call this support function to handle irqs. */ | |
f230d101 | 471 | static inline void parport_generic_irq(struct parport *port) |
1da177e4 | 472 | { |
f230d101 | 473 | parport_ieee1284_interrupt (port); |
1da177e4 LT |
474 | read_lock(&port->cad_lock); |
475 | if (port->cad && port->cad->irq_func) | |
5712cb3d | 476 | port->cad->irq_func(port->cad->private); |
1da177e4 LT |
477 | read_unlock(&port->cad_lock); |
478 | } | |
479 | ||
480 | /* Prototypes from parport_procfs */ | |
481 | extern int parport_proc_register(struct parport *pp); | |
482 | extern int parport_proc_unregister(struct parport *pp); | |
483 | extern int parport_device_proc_register(struct pardevice *device); | |
484 | extern int parport_device_proc_unregister(struct pardevice *device); | |
485 | ||
486 | /* If PC hardware is the only type supported, we can optimise a bit. */ | |
487 | #if !defined(CONFIG_PARPORT_NOT_PC) | |
488 | ||
489 | #include <linux/parport_pc.h> | |
490 | #define parport_write_data(p,x) parport_pc_write_data(p,x) | |
491 | #define parport_read_data(p) parport_pc_read_data(p) | |
492 | #define parport_write_control(p,x) parport_pc_write_control(p,x) | |
493 | #define parport_read_control(p) parport_pc_read_control(p) | |
494 | #define parport_frob_control(p,m,v) parport_pc_frob_control(p,m,v) | |
495 | #define parport_read_status(p) parport_pc_read_status(p) | |
496 | #define parport_enable_irq(p) parport_pc_enable_irq(p) | |
497 | #define parport_disable_irq(p) parport_pc_disable_irq(p) | |
498 | #define parport_data_forward(p) parport_pc_data_forward(p) | |
499 | #define parport_data_reverse(p) parport_pc_data_reverse(p) | |
500 | ||
501 | #else /* !CONFIG_PARPORT_NOT_PC */ | |
502 | ||
503 | /* Generic operations vector through the dispatch table. */ | |
504 | #define parport_write_data(p,x) (p)->ops->write_data(p,x) | |
505 | #define parport_read_data(p) (p)->ops->read_data(p) | |
506 | #define parport_write_control(p,x) (p)->ops->write_control(p,x) | |
507 | #define parport_read_control(p) (p)->ops->read_control(p) | |
508 | #define parport_frob_control(p,m,v) (p)->ops->frob_control(p,m,v) | |
509 | #define parport_read_status(p) (p)->ops->read_status(p) | |
510 | #define parport_enable_irq(p) (p)->ops->enable_irq(p) | |
511 | #define parport_disable_irq(p) (p)->ops->disable_irq(p) | |
512 | #define parport_data_forward(p) (p)->ops->data_forward(p) | |
513 | #define parport_data_reverse(p) (p)->ops->data_reverse(p) | |
514 | ||
515 | #endif /* !CONFIG_PARPORT_NOT_PC */ | |
516 | ||
929dfb24 AB |
517 | extern unsigned long parport_default_timeslice; |
518 | extern int parport_default_spintime; | |
519 | ||
1da177e4 | 520 | #endif /* _PARPORT_H_ */ |