1 /* $Id: parport.h,v 1.1 1998/05/17 10:57:52 andrea Exp andrea $ */
2
3 /*
4 * Any part of this program may be used in documents licensed under
5 * the GNU Free Documentation License, Version 1.1 or any later version
6 * published by the Free Software Foundation.
7 */
8
9 #ifndef _PARPORT_H_
10 #define _PARPORT_H_
11
12 /* Start off with user-visible constants */
13
14 /* Maximum of 16 ports per machine */
15 #define PARPORT_MAX 16
16
17 /* Magic numbers */
18 #define PARPORT_IRQ_NONE -1
19 #define PARPORT_DMA_NONE -1
20 #define PARPORT_IRQ_AUTO -2
21 #define PARPORT_DMA_AUTO -2
22 #define PARPORT_DMA_NOFIFO -3
23 #define PARPORT_DISABLE -2
24 #define PARPORT_IRQ_PROBEONLY -3
25 #define PARPORT_IOHI_AUTO -1
26
27 #define PARPORT_CONTROL_STROBE 0x1
28 #define PARPORT_CONTROL_AUTOFD 0x2
29 #define PARPORT_CONTROL_INIT 0x4
30 #define PARPORT_CONTROL_SELECT 0x8
31
32 #define PARPORT_STATUS_ERROR 0x8
33 #define PARPORT_STATUS_SELECT 0x10
34 #define PARPORT_STATUS_PAPEROUT 0x20
35 #define PARPORT_STATUS_ACK 0x40
36 #define PARPORT_STATUS_BUSY 0x80
37
38 /* Type classes for Plug-and-Play probe. */
39 typedef enum {
40 PARPORT_CLASS_LEGACY = 0, /* Non-IEEE1284 device */
41 PARPORT_CLASS_PRINTER,
42 PARPORT_CLASS_MODEM,
43 PARPORT_CLASS_NET,
44 PARPORT_CLASS_HDC, /* Hard disk controller */
45 PARPORT_CLASS_PCMCIA,
46 PARPORT_CLASS_MEDIA, /* Multimedia device */
47 PARPORT_CLASS_FDC, /* Floppy disk controller */
48 PARPORT_CLASS_PORTS,
49 PARPORT_CLASS_SCANNER,
50 PARPORT_CLASS_DIGCAM,
51 PARPORT_CLASS_OTHER, /* Anything else */
52 PARPORT_CLASS_UNSPEC, /* No CLS field in ID */
53 PARPORT_CLASS_SCSIADAPTER
54 } parport_device_class;
55
56 /* The "modes" entry in parport is a bit field representing the
57 capabilities of the hardware. */
58 #define PARPORT_MODE_PCSPP (1<<0) /* IBM PC registers available. */
59 #define PARPORT_MODE_TRISTATE (1<<1) /* Can tristate. */
60 #define PARPORT_MODE_EPP (1<<2) /* Hardware EPP. */
61 #define PARPORT_MODE_ECP (1<<3) /* Hardware ECP. */
62 #define PARPORT_MODE_COMPAT (1<<4) /* Hardware 'printer protocol'. */
63 #define PARPORT_MODE_DMA (1<<5) /* Hardware can DMA. */
64 #define PARPORT_MODE_SAFEININT (1<<6) /* SPP registers accessible in IRQ. */
65
66 /* IEEE1284 modes:
67 Nibble mode, byte mode, ECP, ECPRLE and EPP are their own
68 'extensibility request' values. Others are special.
69 'Real' ECP modes must have the IEEE1284_MODE_ECP bit set. */
70 #define IEEE1284_MODE_NIBBLE 0
71 #define IEEE1284_MODE_BYTE (1<<0)
72 #define IEEE1284_MODE_COMPAT (1<<8)
73 #define IEEE1284_MODE_BECP (1<<9) /* Bounded ECP mode */
74 #define IEEE1284_MODE_ECP (1<<4)
75 #define IEEE1284_MODE_ECPRLE (IEEE1284_MODE_ECP | (1<<5))
76 #define IEEE1284_MODE_ECPSWE (1<<10) /* Software-emulated */
77 #define IEEE1284_MODE_EPP (1<<6)
78 #define IEEE1284_MODE_EPPSL (1<<11) /* EPP 1.7 */
79 #define IEEE1284_MODE_EPPSWE (1<<12) /* Software-emulated */
80 #define IEEE1284_DEVICEID (1<<2) /* This is a flag */
81 #define IEEE1284_EXT_LINK (1<<14) /* This flag causes the
82 * extensibility link to
83 * be requested, using
84 * bits 0-6. */
85
86 /* For the benefit of parport_read/write, you can use these with
87 * parport_negotiate to use address operations. They have no effect
88 * other than to make parport_read/write use address transfers. */
89 #define IEEE1284_ADDR (1<<13) /* This is a flag */
90 #define IEEE1284_DATA 0 /* So is this */
91
92 /* Flags for block transfer operations. */
93 #define PARPORT_EPP_FAST (1<<0) /* Unreliable counts. */
94 #define PARPORT_W91284PIC (1<<1) /* have a Warp9 w91284pic in the device */
95
96 /* The rest is for the kernel only */
97 #ifdef __KERNEL__
98
99 #include <linux/wait.h>
100 #include <linux/spinlock.h>
101 #include <asm/system.h>
102 #include <asm/ptrace.h>
103 #include <asm/semaphore.h>
104 #include <linux/proc_fs.h>
105 #include <linux/config.h>
106
107 #define PARPORT_NEED_GENERIC_OPS
108
109 /* Define this later. */
110 struct parport;
111 struct pardevice;
112
113 struct pc_parport_state {
114 unsigned int ctr;
115 unsigned int ecr;
116 };
117
118 struct ax_parport_state {
119 unsigned int ctr;
120 unsigned int ecr;
121 unsigned int dcsr;
122 };
123
124 /* used by both parport_amiga and parport_mfc3 */
125 struct amiga_parport_state {
126 unsigned char data; /* ciaa.prb */
127 unsigned char datadir; /* ciaa.ddrb */
128 unsigned char status; /* ciab.pra & 7 */
129 unsigned char statusdir;/* ciab.ddrb & 7 */
130 };
131
132 struct parport_state {
133 union {
134 struct pc_parport_state pc;
135 /* ARC has no state. */
136 struct ax_parport_state ax;
137 struct amiga_parport_state amiga;
138 /* Atari has not state. */
139 void *misc;
140 } u;
141 };
142
143 struct parport_operations {
144 /* IBM PC-style virtual registers. */
145 void (*write_data)(struct parport *, unsigned char);
146 unsigned char (*read_data)(struct parport *);
147
148 void (*write_control)(struct parport *, unsigned char);
149 unsigned char (*read_control)(struct parport *);
150 unsigned char (*frob_control)(struct parport *, unsigned char mask,
151 unsigned char val);
152
153 unsigned char (*read_status)(struct parport *);
154
155 /* IRQs. */
156 void (*enable_irq)(struct parport *);
157 void (*disable_irq)(struct parport *);
158
159 /* Data direction. */
160 void (*data_forward) (struct parport *);
161 void (*data_reverse) (struct parport *);
162
163 /* For core parport code. */
164 void (*init_state)(struct pardevice *, struct parport_state *);
165 void (*save_state)(struct parport *, struct parport_state *);
166 void (*restore_state)(struct parport *, struct parport_state *);
167
168 void (*inc_use_count)(void);
169 void (*dec_use_count)(void);
170
171 /* Block read/write */
172 size_t (*epp_write_data) (struct parport *port, const void *buf,
173 size_t len, int flags);
174 size_t (*epp_read_data) (struct parport *port, void *buf, size_t len,
175 int flags);
176 size_t (*epp_write_addr) (struct parport *port, const void *buf,
177 size_t len, int flags);
178 size_t (*epp_read_addr) (struct parport *port, void *buf, size_t len,
179 int flags);
180
181 size_t (*ecp_write_data) (struct parport *port, const void *buf,
182 size_t len, int flags);
183 size_t (*ecp_read_data) (struct parport *port, void *buf, size_t len,
184 int flags);
185 size_t (*ecp_write_addr) (struct parport *port, const void *buf,
186 size_t len, int flags);
187
188 size_t (*compat_write_data) (struct parport *port, const void *buf,
189 size_t len, int flags);
190 size_t (*nibble_read_data) (struct parport *port, void *buf,
191 size_t len, int flags);
192 size_t (*byte_read_data) (struct parport *port, void *buf,
193 size_t len, int flags);
194 };
195
196 struct parport_device_info {
197 parport_device_class class;
198 const char *class_name;
199 const char *mfr;
200 const char *model;
201 const char *cmdset;
202 const char *description;
203 };
204
205 /* Each device can have two callback functions:
206 * 1) a preemption function, called by the resource manager to request
207 * that the driver relinquish control of the port. The driver should
208 * return zero if it agrees to release the port, and nonzero if it
209 * refuses. Do not call parport_release() - the kernel will do this
210 * implicitly.
211 *
212 * 2) a wake-up function, called by the resource manager to tell drivers
213 * that the port is available to be claimed. If a driver wants to use
214 * the port, it should call parport_claim() here.
215 */
216
217 /* A parallel port device */
218 struct pardevice {
219 const char *name;
220 struct parport *port;
221 int daisy;
222 int (*preempt)(void *);
223 void (*wakeup)(void *);
224 void *private;
225 void (*irq_func)(int, void *, struct pt_regs *);
226 unsigned int flags;
227 struct pardevice *next;
228 struct pardevice *prev;
229 struct parport_state *state; /* saved status over preemption */
230 wait_queue_head_t wait_q;
231 unsigned long int time;
232 unsigned long int timeslice;
233 volatile long int timeout;
234 unsigned long waiting; /* long req'd for set_bit --RR */
235 struct pardevice *waitprev;
236 struct pardevice *waitnext;
237 void * sysctl_table;
238 };
239
240 /* IEEE1284 information */
241
242 /* IEEE1284 phases */
243 enum ieee1284_phase {
244 IEEE1284_PH_FWD_DATA,
245 IEEE1284_PH_FWD_IDLE,
246 IEEE1284_PH_TERMINATE,
247 IEEE1284_PH_NEGOTIATION,
248 IEEE1284_PH_HBUSY_DNA,
249 IEEE1284_PH_REV_IDLE,
250 IEEE1284_PH_HBUSY_DAVAIL,
251 IEEE1284_PH_REV_DATA,
252 IEEE1284_PH_ECP_SETUP,
253 IEEE1284_PH_ECP_FWD_TO_REV,
254 IEEE1284_PH_ECP_REV_TO_FWD,
255 IEEE1284_PH_ECP_DIR_UNKNOWN,
256 };
257 struct ieee1284_info {
258 int mode;
259 volatile enum ieee1284_phase phase;
260 struct semaphore irq;
261 };
262
263 /* A parallel port */
264 struct parport {
265 unsigned long base; /* base address */
266 unsigned long base_hi; /* base address (hi - ECR) */
267 unsigned int size; /* IO extent */
268 const char *name;
269 unsigned int modes;
270 int irq; /* interrupt (or -1 for none) */
271 int dma;
272 int muxport; /* which muxport (if any) this is */
273 int portnum; /* which physical parallel port (not mux) */
274
275 struct parport *physport;
276 /* If this is a non-default mux
277 parport, i.e. we're a clone of a real
278 physical port, this is a pointer to that
279 port. The locking is only done in the
280 real port. For a clone port, the
281 following structure members are
282 meaningless: devices, cad, muxsel,
283 waithead, waittail, flags, pdir,
284 ieee1284, *_lock.
285
286 It this is a default mux parport, or
287 there is no mux involved, this points to
288 ourself. */
289
290 struct pardevice *devices;
291 struct pardevice *cad; /* port owner */
292 int daisy; /* currently selected daisy addr */
293 int muxsel; /* currently selected mux port */
294
295 struct pardevice *waithead;
296 struct pardevice *waittail;
297
298 struct parport *next;
299 unsigned int flags;
300
301 void *sysctl_table;
302 struct parport_device_info probe_info[5]; /* 0-3 + non-IEEE1284.3 */
303 struct ieee1284_info ieee1284;
304
305 struct parport_operations *ops;
306 void *private_data; /* for lowlevel driver */
307
308 int number; /* port index - the `n' in `parportn' */
309 spinlock_t pardevice_lock;
310 spinlock_t waitlist_lock;
311 rwlock_t cad_lock;
312
313 int spintime;
314 atomic_t ref_count;
315 };
316
317 #define DEFAULT_SPIN_TIME 500 /* us */
318
319 struct parport_driver {
320 const char *name;
321 void (*attach) (struct parport *);
322 void (*detach) (struct parport *);
323 struct parport_driver *next;
324 };
325
326 /* parport_register_port registers a new parallel port at the given
327 address (if one does not already exist) and returns a pointer to it.
328 This entails claiming the I/O region, IRQ and DMA. NULL is returned
329 if initialisation fails. */
330 struct parport *parport_register_port(unsigned long base, int irq, int dma,
331 struct parport_operations *ops);
332
333 /* Once a registered port is ready for high-level drivers to use, the
334 low-level driver that registered it should announce it. This will
335 call the high-level drivers' attach() functions (after things like
336 determining the IEEE 1284.3 topology of the port and collecting
337 DeviceIDs). */
338 void parport_announce_port (struct parport *port);
339
340 /* Unregister a port. */
341 extern void parport_unregister_port(struct parport *port);
342
343 /* parport_enumerate returns a pointer to the linked list of all the
344 ports in this machine. DON'T USE THIS. Use
345 parport_register_driver instead. */
346 struct parport *parport_enumerate(void);
347
348 /* Register a new high-level driver. */
349 extern int parport_register_driver (struct parport_driver *);
350
351 /* Unregister a high-level driver. */
352 extern void parport_unregister_driver (struct parport_driver *);
353
354 /* If parport_register_driver doesn't fit your needs, perhaps
355 * parport_find_xxx does. */
356 extern struct parport *parport_find_number (int);
357 extern struct parport *parport_find_base (unsigned long);
358
359 /* Reference counting for ports. */
360 extern struct parport *parport_get_port (struct parport *);
361 extern void parport_put_port (struct parport *);
362
363 /* parport_register_device declares that a device is connected to a
364 port, and tells the kernel all it needs to know.
365 - pf is the preemption function (may be NULL for no callback)
366 - kf is the wake-up function (may be NULL for no callback)
367 - irq_func is the interrupt handler (may be NULL for no interrupts)
368 - handle is a user pointer that gets handed to callback functions. */
369 struct pardevice *parport_register_device(struct parport *port,
370 const char *name,
371 int (*pf)(void *), void (*kf)(void *),
372 void (*irq_func)(int, void *, struct pt_regs *),
373 int flags, void *handle);
374
375 /* parport_unregister unlinks a device from the chain. */
376 extern void parport_unregister_device(struct pardevice *dev);
377
378 /* parport_claim tries to gain ownership of the port for a particular
379 driver. This may fail (return non-zero) if another driver is busy.
380 If this driver has registered an interrupt handler, it will be
381 enabled. */
382 extern int parport_claim(struct pardevice *dev);
383
384 /* parport_claim_or_block is the same, but sleeps if the port cannot
385 be claimed. Return value is 1 if it slept, 0 normally and -errno
386 on error. */
387 extern int parport_claim_or_block(struct pardevice *dev);
388
389 /* parport_release reverses a previous parport_claim. This can never
390 fail, though the effects are undefined (except that they are bad)
391 if you didn't previously own the port. Once you have released the
392 port you should make sure that neither your code nor the hardware
393 on the port tries to initiate any communication without first
394 re-claiming the port. If you mess with the port state (enabling
395 ECP for example) you should clean up before releasing the port. */
396
397 extern void parport_release(struct pardevice *dev);
398
399 /**
400 * parport_yield - relinquish a parallel port temporarily
401 * @dev: a device on the parallel port
402 *
403 * This function relinquishes the port if it would be helpful to other
404 * drivers to do so. Afterwards it tries to reclaim the port using
405 * parport_claim(), and the return value is the same as for
406 * parport_claim(). If it fails, the port is left unclaimed and it is
407 * the driver's responsibility to reclaim the port.
408 *
409 * The parport_yield() and parport_yield_blocking() functions are for
410 * marking points in the driver at which other drivers may claim the
411 * port and use their devices. Yielding the port is similar to
412 * releasing it and reclaiming it, but is more efficient because no
413 * action is taken if there are no other devices needing the port. In
414 * fact, nothing is done even if there are other devices waiting but
415 * the current device is still within its "timeslice". The default
416 * timeslice is half a second, but it can be adjusted via the /proc
417 * interface.
418 **/
parport_yield(struct pardevice * dev)419 static __inline__ int parport_yield(struct pardevice *dev)
420 {
421 unsigned long int timeslip = (jiffies - dev->time);
422 if ((dev->port->waithead == NULL) || (timeslip < dev->timeslice))
423 return 0;
424 parport_release(dev);
425 return parport_claim(dev);
426 }
427
428 /**
429 * parport_yield_blocking - relinquish a parallel port temporarily
430 * @dev: a device on the parallel port
431 *
432 * This function relinquishes the port if it would be helpful to other
433 * drivers to do so. Afterwards it tries to reclaim the port using
434 * parport_claim_or_block(), and the return value is the same as for
435 * parport_claim_or_block().
436 **/
parport_yield_blocking(struct pardevice * dev)437 static __inline__ int parport_yield_blocking(struct pardevice *dev)
438 {
439 unsigned long int timeslip = (jiffies - dev->time);
440 if ((dev->port->waithead == NULL) || (timeslip < dev->timeslice))
441 return 0;
442 parport_release(dev);
443 return parport_claim_or_block(dev);
444 }
445
446 /* Flags used to identify what a device does. */
447 #define PARPORT_DEV_TRAN 0 /* WARNING !! DEPRECATED !! */
448 #define PARPORT_DEV_LURK (1<<0) /* WARNING !! DEPRECATED !! */
449 #define PARPORT_DEV_EXCL (1<<1) /* Need exclusive access. */
450
451 #define PARPORT_FLAG_EXCL (1<<1) /* EXCL driver registered. */
452
453 extern int parport_parse_irqs(int, const char *[], int irqval[]);
454 extern int parport_parse_dmas(int, const char *[], int dmaval[]);
455
456 /* IEEE1284 functions */
457 extern void parport_ieee1284_interrupt (int, void *, struct pt_regs *);
458 extern int parport_negotiate (struct parport *, int mode);
459 extern ssize_t parport_write (struct parport *, const void *buf, size_t len);
460 extern ssize_t parport_read (struct parport *, void *buf, size_t len);
461
462 #define PARPORT_INACTIVITY_O_NONBLOCK 1
463 extern long parport_set_timeout (struct pardevice *, long inactivity);
464
465 extern int parport_wait_event (struct parport *, long timeout);
466 extern int parport_wait_peripheral (struct parport *port,
467 unsigned char mask,
468 unsigned char val);
469 extern int parport_poll_peripheral (struct parport *port,
470 unsigned char mask,
471 unsigned char val,
472 int usec);
473
474 /* For architectural drivers */
475 extern void parport_ieee1284_wakeup (struct parport *port);
476 extern size_t parport_ieee1284_write_compat (struct parport *,
477 const void *, size_t, int);
478 extern size_t parport_ieee1284_read_nibble (struct parport *,
479 void *, size_t, int);
480 extern size_t parport_ieee1284_read_byte (struct parport *,
481 void *, size_t, int);
482 extern size_t parport_ieee1284_ecp_read_data (struct parport *,
483 void *, size_t, int);
484 extern size_t parport_ieee1284_ecp_write_data (struct parport *,
485 const void *, size_t, int);
486 extern size_t parport_ieee1284_ecp_write_addr (struct parport *,
487 const void *, size_t, int);
488 extern size_t parport_ieee1284_epp_write_data (struct parport *,
489 const void *, size_t, int);
490 extern size_t parport_ieee1284_epp_read_data (struct parport *,
491 void *, size_t, int);
492 extern size_t parport_ieee1284_epp_write_addr (struct parport *,
493 const void *, size_t, int);
494 extern size_t parport_ieee1284_epp_read_addr (struct parport *,
495 void *, size_t, int);
496
497 /* IEEE1284.3 functions */
498 extern int parport_daisy_init (struct parport *port);
499 extern void parport_daisy_fini (struct parport *port);
500 extern struct pardevice *parport_open (int devnum, const char *name,
501 int (*pf) (void *),
502 void (*kf) (void *),
503 void (*irqf) (int, void *,
504 struct pt_regs *),
505 int flags, void *handle);
506 extern void parport_close (struct pardevice *dev);
507 extern ssize_t parport_device_id (int devnum, char *buffer, size_t len);
508 extern int parport_device_num (int parport, int mux, int daisy);
509 extern int parport_device_coords (int devnum, int *parport, int *mux,
510 int *daisy);
511 extern void parport_daisy_deselect_all (struct parport *port);
512 extern int parport_daisy_select (struct parport *port, int daisy, int mode);
513
514 /* For finding devices based on their device ID. Example usage:
515 int devnum = -1;
516 while ((devnum = parport_find_class (PARPORT_CLASS_DIGCAM, devnum)) != -1) {
517 struct pardevice *dev = parport_open (devnum, ...);
518 ...
519 }
520 */
521 extern int parport_find_device (const char *mfg, const char *mdl, int from);
522 extern int parport_find_class (parport_device_class cls, int from);
523
524 /* Lowlevel drivers _can_ call this support function to handle irqs. */
parport_generic_irq(int irq,struct parport * port,struct pt_regs * regs)525 static __inline__ void parport_generic_irq(int irq, struct parport *port,
526 struct pt_regs *regs)
527 {
528 parport_ieee1284_interrupt (irq, port, regs);
529 read_lock(&port->cad_lock);
530 if (port->cad && port->cad->irq_func)
531 port->cad->irq_func(irq, port->cad->private, regs);
532 read_unlock(&port->cad_lock);
533 }
534
535 /* Prototypes from parport_procfs */
536 extern int parport_proc_register(struct parport *pp);
537 extern int parport_proc_unregister(struct parport *pp);
538 extern int parport_device_proc_register(struct pardevice *device);
539 extern int parport_device_proc_unregister(struct pardevice *device);
540 extern int parport_default_proc_register(void);
541 extern int parport_default_proc_unregister(void);
542
543 extern void dec_parport_count(void);
544 extern void inc_parport_count(void);
545
546 /* If PC hardware is the only type supported, we can optimise a bit. */
547 #if (defined(CONFIG_PARPORT_PC) || defined(CONFIG_PARPORT_PC_MODULE)) && !(defined(CONFIG_PARPORT_ARC) || defined(CONFIG_PARPORT_ARC_MODULE)) && !(defined(CONFIG_PARPORT_AMIGA) || defined(CONFIG_PARPORT_AMIGA_MODULE)) && !(defined(CONFIG_PARPORT_MFC3) || defined(CONFIG_PARPORT_MFC3_MODULE)) && !(defined(CONFIG_PARPORT_ATARI) || defined(CONFIG_PARPORT_ATARI_MODULE)) && !(defined(CONFIG_USB_USS720) || defined(CONFIG_USB_USS720_MODULE)) && !(defined(CONFIG_PARPORT_SUNBPP) || defined(CONFIG_PARPORT_SUNBPP_MODULE)) && !(defined(CONFIG_PARPORT_GSC) || defined(CONFIG_PARPORT_GSC_MODULE)) && !defined(CONFIG_PARPORT_OTHER)
548
549 #undef PARPORT_NEED_GENERIC_OPS
550 #include <linux/parport_pc.h>
551 #define parport_write_data(p,x) parport_pc_write_data(p,x)
552 #define parport_read_data(p) parport_pc_read_data(p)
553 #define parport_write_control(p,x) parport_pc_write_control(p,x)
554 #define parport_read_control(p) parport_pc_read_control(p)
555 #define parport_frob_control(p,m,v) parport_pc_frob_control(p,m,v)
556 #define parport_read_status(p) parport_pc_read_status(p)
557 #define parport_enable_irq(p) parport_pc_enable_irq(p)
558 #define parport_disable_irq(p) parport_pc_disable_irq(p)
559 #define parport_data_forward(p) parport_pc_data_forward(p)
560 #define parport_data_reverse(p) parport_pc_data_reverse(p)
561 #endif
562
563 #ifdef PARPORT_NEED_GENERIC_OPS
564 /* Generic operations vector through the dispatch table. */
565 #define parport_write_data(p,x) (p)->ops->write_data(p,x)
566 #define parport_read_data(p) (p)->ops->read_data(p)
567 #define parport_write_control(p,x) (p)->ops->write_control(p,x)
568 #define parport_read_control(p) (p)->ops->read_control(p)
569 #define parport_frob_control(p,m,v) (p)->ops->frob_control(p,m,v)
570 #define parport_read_status(p) (p)->ops->read_status(p)
571 #define parport_enable_irq(p) (p)->ops->enable_irq(p)
572 #define parport_disable_irq(p) (p)->ops->disable_irq(p)
573 #define parport_data_forward(p) (p)->ops->data_forward(p)
574 #define parport_data_reverse(p) (p)->ops->data_reverse(p)
575 #endif
576
577 #endif /* __KERNEL__ */
578 #endif /* _PARPORT_H_ */
579