include/linux/parport.h

   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/jiffies.h>
 100 #include <linux/proc_fs.h>
 101 #include <linux/spinlock.h>
 102 #include <linux/wait.h>
 103 #include <asm/system.h>
 104 #include <asm/ptrace.h>
 105 #include <asm/semaphore.h>
 106
 107 /* Define this later. */
 108 struct parport;
 109 struct pardevice;
 110
 111 struct pc_parport_state {
 112         unsigned int ctr;
 113         unsigned int ecr;
 114 };
 115
 116 struct ax_parport_state {
 117         unsigned int ctr;
 118         unsigned int ecr;
 119         unsigned int dcsr;
 120 };
 121
 122 /* used by both parport_amiga and parport_mfc3 */
 123 struct amiga_parport_state {
 124        unsigned char data;     /* ciaa.prb */
 125        unsigned char datadir;  /* ciaa.ddrb */
 126        unsigned char status;   /* ciab.pra & 7 */
 127        unsigned char statusdir;/* ciab.ddrb & 7 */
 128 };
 129
 130 struct ax88796_parport_state {
 131         unsigned char cpr;
 132 };
 133
 134 struct ip32_parport_state {
 135         unsigned int dcr;
 136         unsigned int ecr;
 137 };
 138
 139 struct parport_state {
 140         union {
 141                 struct pc_parport_state pc;
 142                 /* ARC has no state. */
 143                 struct ax_parport_state ax;
 144                 struct amiga_parport_state amiga;
 145                 struct ax88796_parport_state ax88796;
 146                 /* Atari has not state. */
 147                 struct ip32_parport_state ip32;
 148                 void *misc;
 149         } u;
 150 };
 151
 152 struct parport_operations {
 153         /* IBM PC-style virtual registers. */
 154         void (*write_data)(struct parport *, unsigned char);
 155         unsigned char (*read_data)(struct parport *);
 156
 157         void (*write_control)(struct parport *, unsigned char);
 158         unsigned char (*read_control)(struct parport *);
 159         unsigned char (*frob_control)(struct parport *, unsigned char mask,
 160                                       unsigned char val);
 161
 162         unsigned char (*read_status)(struct parport *);
 163
 164         /* IRQs. */
 165         void (*enable_irq)(struct parport *);
 166         void (*disable_irq)(struct parport *);
 167
 168         /* Data direction. */
 169         void (*data_forward) (struct parport *);
 170         void (*data_reverse) (struct parport *);
 171
 172         /* For core parport code. */
 173         void (*init_state)(struct pardevice *, struct parport_state *);
 174         void (*save_state)(struct parport *, struct parport_state *);
 175         void (*restore_state)(struct parport *, struct parport_state *);
 176
 177         /* Block read/write */
 178         size_t (*epp_write_data) (struct parport *port, const void *buf,
 179                                   size_t len, int flags);
 180         size_t (*epp_read_data) (struct parport *port, void *buf, size_t len,
 181                                  int flags);
 182         size_t (*epp_write_addr) (struct parport *port, const void *buf,
 183                                   size_t len, int flags);
 184         size_t (*epp_read_addr) (struct parport *port, void *buf, size_t len,
 185                                  int flags);
 186
 187         size_t (*ecp_write_data) (struct parport *port, const void *buf,
 188                                   size_t len, int flags);
 189         size_t (*ecp_read_data) (struct parport *port, void *buf, size_t len,
 190                                  int flags);
 191         size_t (*ecp_write_addr) (struct parport *port, const void *buf,
 192                                   size_t len, int flags);
 193
 194         size_t (*compat_write_data) (struct parport *port, const void *buf,
 195                                      size_t len, int flags);
 196         size_t (*nibble_read_data) (struct parport *port, void *buf,
 197                                     size_t len, int flags);
 198         size_t (*byte_read_data) (struct parport *port, void *buf,
 199                                   size_t len, int flags);
 200         struct module *owner;
 201 };
 202
 203 struct parport_device_info {
 204         parport_device_class class;
 205         const char *class_name;
 206         const char *mfr;
 207         const char *model;
 208         const char *cmdset;
 209         const char *description;
 210 };
 211
 212 /* Each device can have two callback functions:
 213  *  1) a preemption function, called by the resource manager to request
 214  *     that the driver relinquish control of the port.  The driver should
 215  *     return zero if it agrees to release the port, and nonzero if it
 216  *     refuses.  Do not call parport_release() - the kernel will do this
 217  *     implicitly.
 218  *
 219  *  2) a wake-up function, called by the resource manager to tell drivers
 220  *     that the port is available to be claimed.  If a driver wants to use
 221  *     the port, it should call parport_claim() here.
 222  */
 223
 224 /* A parallel port device */
 225 struct pardevice {
 226         const char *name;
 227         struct parport *port;
 228         int daisy;
 229         int (*preempt)(void *);
 230         void (*wakeup)(void *);
 231         void *private;
 232         void (*irq_func)(int, void *);
 233         unsigned int flags;
 234         struct pardevice *next;
 235         struct pardevice *prev;
 236         struct parport_state *state;     /* saved status over preemption */
 237         wait_queue_head_t wait_q;
 238         unsigned long int time;
 239         unsigned long int timeslice;
 240         volatile long int timeout;
 241         unsigned long waiting;           /* long req'd for set_bit --RR */
 242         struct pardevice *waitprev;
 243         struct pardevice *waitnext;
 244         void * sysctl_table;
 245 };
 246
 247 /* IEEE1284 information */
 248
 249 /* IEEE1284 phases. These are exposed to userland through ppdev IOCTL
 250  * PP[GS]ETPHASE, so do not change existing values. */
 251 enum ieee1284_phase {
 252         IEEE1284_PH_FWD_DATA,
 253         IEEE1284_PH_FWD_IDLE,
 254         IEEE1284_PH_TERMINATE,
 255         IEEE1284_PH_NEGOTIATION,
 256         IEEE1284_PH_HBUSY_DNA,
 257         IEEE1284_PH_REV_IDLE,
 258         IEEE1284_PH_HBUSY_DAVAIL,
 259         IEEE1284_PH_REV_DATA,
 260         IEEE1284_PH_ECP_SETUP,
 261         IEEE1284_PH_ECP_FWD_TO_REV,
 262         IEEE1284_PH_ECP_REV_TO_FWD,
 263         IEEE1284_PH_ECP_DIR_UNKNOWN,
 264 };
 265 struct ieee1284_info {
 266         int mode;
 267         volatile enum ieee1284_phase phase;
 268         struct semaphore irq;
 269 };
 270
 271 /* A parallel port */
 272 struct parport {
 273         unsigned long base;     /* base address */
 274         unsigned long base_hi;  /* base address (hi - ECR) */
 275         unsigned int size;      /* IO extent */
 276         const char *name;
 277         unsigned int modes;
 278         int irq;                /* interrupt (or -1 for none) */
 279         int dma;
 280         int muxport;            /* which muxport (if any) this is */
 281         int portnum;            /* which physical parallel port (not mux) */
 282         struct device *dev;     /* Physical device associated with IO/DMA.
 283                                  * This may unfortulately be null if the
 284                                  * port has a legacy driver.
 285                                  */
 286
 287         struct parport *physport;
 288                                 /* If this is a non-default mux
 289                                    parport, i.e. we're a clone of a real
 290                                    physical port, this is a pointer to that
 291                                    port. The locking is only done in the
 292                                    real port.  For a clone port, the
 293                                    following structure members are
 294                                    meaningless: devices, cad, muxsel,
 295                                    waithead, waittail, flags, pdir,
 296                                    dev, ieee1284, *_lock.
 297
 298                                    It this is a default mux parport, or
 299                                    there is no mux involved, this points to
 300                                    ourself. */
 301
 302         struct pardevice *devices;
 303         struct pardevice *cad;  /* port owner */
 304         int daisy;              /* currently selected daisy addr */
 305         int muxsel;             /* currently selected mux port */
 306
 307         struct pardevice *waithead;
 308         struct pardevice *waittail;
 309
 310         struct list_head list;
 311         unsigned int flags;
 312
 313         void *sysctl_table;
 314         struct parport_device_info probe_info[5]; /* 0-3 + non-IEEE1284.3 */
 315         struct ieee1284_info ieee1284;
 316
 317         struct parport_operations *ops;
 318         void *private_data;     /* for lowlevel driver */
 319
 320         int number;             /* port index - the `n' in `parportn' */
 321         spinlock_t pardevice_lock;
 322         spinlock_t waitlist_lock;
 323         rwlock_t cad_lock;
 324
 325         int spintime;
 326         atomic_t ref_count;
 327
 328         struct list_head full_list;
 329         struct parport *slaves[3];
 330 };
 331
 332 #define DEFAULT_SPIN_TIME 500 /* us */
 333
 334 struct parport_driver {
 335         const char *name;
 336         void (*attach) (struct parport *);
 337         void (*detach) (struct parport *);
 338         struct list_head list;
 339 };
 340
 341 /* parport_register_port registers a new parallel port at the given
 342    address (if one does not already exist) and returns a pointer to it.
 343    This entails claiming the I/O region, IRQ and DMA.  NULL is returned
 344    if initialisation fails. */
 345 struct parport *parport_register_port(unsigned long base, int irq, int dma,
 346                                       struct parport_operations *ops);
 347
 348 /* Once a registered port is ready for high-level drivers to use, the
 349    low-level driver that registered it should announce it.  This will
 350    call the high-level drivers' attach() functions (after things like
 351    determining the IEEE 1284.3 topology of the port and collecting
 352    DeviceIDs). */
 353 void parport_announce_port (struct parport *port);
 354
 355 /* Unregister a port. */
 356 extern void parport_remove_port(struct parport *port);
 357
 358 /* Register a new high-level driver. */
 359 extern int parport_register_driver (struct parport_driver *);
 360
 361 /* Unregister a high-level driver. */
 362 extern void parport_unregister_driver (struct parport_driver *);
 363
 364 /* If parport_register_driver doesn't fit your needs, perhaps
 365  * parport_find_xxx does. */
 366 extern struct parport *parport_find_number (int);
 367 extern struct parport *parport_find_base (unsigned long);
 368
 369 /* Reference counting for ports. */
 370 extern struct parport *parport_get_port (struct parport *);
 371 extern void parport_put_port (struct parport *);
 372
 373 /* parport_register_device declares that a device is connected to a
 374    port, and tells the kernel all it needs to know.
 375    - pf is the preemption function (may be NULL for no callback)
 376    - kf is the wake-up function (may be NULL for no callback)
 377    - irq_func is the interrupt handler (may be NULL for no interrupts)
 378    - handle is a user pointer that gets handed to callback functions.  */
 379 struct pardevice *parport_register_device(struct parport *port,
 380                           const char *name,
 381                           int (*pf)(void *), void (*kf)(void *),
 382                           void (*irq_func)(int, void *),
 383                           int flags, void *handle);
 384
 385 /* parport_unregister unlinks a device from the chain. */
 386 extern void parport_unregister_device(struct pardevice *dev);
 387
 388 /* parport_claim tries to gain ownership of the port for a particular
 389    driver.  This may fail (return non-zero) if another driver is busy.
 390    If this driver has registered an interrupt handler, it will be
 391    enabled.  */
 392 extern int parport_claim(struct pardevice *dev);
 393
 394 /* parport_claim_or_block is the same, but sleeps if the port cannot
 395    be claimed.  Return value is 1 if it slept, 0 normally and -errno
 396    on error.  */
 397 extern int parport_claim_or_block(struct pardevice *dev);
 398
 399 /* parport_release reverses a previous parport_claim.  This can never
 400    fail, though the effects are undefined (except that they are bad)
 401    if you didn't previously own the port.  Once you have released the
 402    port you should make sure that neither your code nor the hardware
 403    on the port tries to initiate any communication without first
 404    re-claiming the port.  If you mess with the port state (enabling
 405    ECP for example) you should clean up before releasing the port. */
 406
 407 extern void parport_release(struct pardevice *dev);
 408
 409 /**
 410  * parport_yield - relinquish a parallel port temporarily
 411  * @dev: a device on the parallel port
 412  *
 413  * This function relinquishes the port if it would be helpful to other
 414  * drivers to do so.  Afterwards it tries to reclaim the port using
 415  * parport_claim(), and the return value is the same as for
 416  * parport_claim().  If it fails, the port is left unclaimed and it is
 417  * the driver's responsibility to reclaim the port.
 418  *
 419  * The parport_yield() and parport_yield_blocking() functions are for
 420  * marking points in the driver at which other drivers may claim the
 421  * port and use their devices.  Yielding the port is similar to
 422  * releasing it and reclaiming it, but is more efficient because no
 423  * action is taken if there are no other devices needing the port.  In
 424  * fact, nothing is done even if there are other devices waiting but
 425  * the current device is still within its "timeslice".  The default
 426  * timeslice is half a second, but it can be adjusted via the /proc
 427  * interface.
 428  **/
 429 static __inline__ int parport_yield(struct pardevice *dev)
 430 {
 431         unsigned long int timeslip = (jiffies - dev->time);
 432         if ((dev->port->waithead == NULL) || (timeslip < dev->timeslice))
 433                 return 0;
 434         parport_release(dev);
 435         return parport_claim(dev);
 436 }
 437
 438 /**
 439  * parport_yield_blocking - relinquish a parallel port temporarily
 440  * @dev: a device on the parallel port
 441  *
 442  * This function relinquishes the port if it would be helpful to other
 443  * drivers to do so.  Afterwards it tries to reclaim the port using
 444  * parport_claim_or_block(), and the return value is the same as for
 445  * parport_claim_or_block().
 446  **/
 447 static __inline__ int parport_yield_blocking(struct pardevice *dev)
 448 {
 449         unsigned long int timeslip = (jiffies - dev->time);
 450         if ((dev->port->waithead == NULL) || (timeslip < dev->timeslice))
 451                 return 0;
 452         parport_release(dev);
 453         return parport_claim_or_block(dev);
 454 }
 455
 456 /* Flags used to identify what a device does. */
 457 #define PARPORT_DEV_TRAN                0       /* WARNING !! DEPRECATED !! */
 458 #define PARPORT_DEV_LURK                (1<<0)  /* WARNING !! DEPRECATED !! */
 459 #define PARPORT_DEV_EXCL                (1<<1)  /* Need exclusive access. */
 460
 461 #define PARPORT_FLAG_EXCL               (1<<1)  /* EXCL driver registered. */
 462
 463 /* IEEE1284 functions */
 464 extern void parport_ieee1284_interrupt (int, void *);
 465 extern int parport_negotiate (struct parport *, int mode);
 466 extern ssize_t parport_write (struct parport *, const void *buf, size_t len);
 467 extern ssize_t parport_read (struct parport *, void *buf, size_t len);
 468
 469 #define PARPORT_INACTIVITY_O_NONBLOCK 1
 470 extern long parport_set_timeout (struct pardevice *, long inactivity);
 471
 472 extern int parport_wait_event (struct parport *, long timeout);
 473 extern int parport_wait_peripheral (struct parport *port,
 474                                     unsigned char mask,
 475                                     unsigned char val);
 476 extern int parport_poll_peripheral (struct parport *port,
 477                                     unsigned char mask,
 478                                     unsigned char val,
 479                                     int usec);
 480
 481 /* For architectural drivers */
 482 extern size_t parport_ieee1284_write_compat (struct parport *,
 483                                              const void *, size_t, int);
 484 extern size_t parport_ieee1284_read_nibble (struct parport *,
 485                                             void *, size_t, int);
 486 extern size_t parport_ieee1284_read_byte (struct parport *,
 487                                           void *, size_t, int);
 488 extern size_t parport_ieee1284_ecp_read_data (struct parport *,
 489                                               void *, size_t, int);
 490 extern size_t parport_ieee1284_ecp_write_data (struct parport *,
 491                                                const void *, size_t, int);
 492 extern size_t parport_ieee1284_ecp_write_addr (struct parport *,
 493                                                const void *, size_t, int);
 494 extern size_t parport_ieee1284_epp_write_data (struct parport *,
 495                                                const void *, size_t, int);
 496 extern size_t parport_ieee1284_epp_read_data (struct parport *,
 497                                               void *, size_t, int);
 498 extern size_t parport_ieee1284_epp_write_addr (struct parport *,
 499                                                const void *, size_t, int);
 500 extern size_t parport_ieee1284_epp_read_addr (struct parport *,
 501                                               void *, size_t, int);
 502
 503 /* IEEE1284.3 functions */
 504 extern int parport_daisy_init (struct parport *port);
 505 extern void parport_daisy_fini (struct parport *port);
 506 extern struct pardevice *parport_open (int devnum, const char *name,
 507                                        int (*pf) (void *),
 508                                        void (*kf) (void *),
 509                                        void (*irqf) (int, void *),
 510                                        int flags, void *handle);
 511 extern void parport_close (struct pardevice *dev);
 512 extern ssize_t parport_device_id (int devnum, char *buffer, size_t len);
 513 extern int parport_device_num (int parport, int mux, int daisy);
 514 extern void parport_daisy_deselect_all (struct parport *port);
 515 extern int parport_daisy_select (struct parport *port, int daisy, int mode);
 516
 517 /* Lowlevel drivers _can_ call this support function to handle irqs.  */
 518 static __inline__ void parport_generic_irq(int irq, struct parport *port)
 519 {
 520         parport_ieee1284_interrupt (irq, port);
 521         read_lock(&port->cad_lock);
 522         if (port->cad && port->cad->irq_func)
 523                 port->cad->irq_func(irq, port->cad->private);
 524         read_unlock(&port->cad_lock);
 525 }
 526
 527 /* Prototypes from parport_procfs */
 528 extern int parport_proc_register(struct parport *pp);
 529 extern int parport_proc_unregister(struct parport *pp);
 530 extern int parport_device_proc_register(struct pardevice *device);
 531 extern int parport_device_proc_unregister(struct pardevice *device);
 532
 533 /* If PC hardware is the only type supported, we can optimise a bit.  */
 534 #if !defined(CONFIG_PARPORT_NOT_PC)
 535
 536 #include <linux/parport_pc.h>
 537 #define parport_write_data(p,x)            parport_pc_write_data(p,x)
 538 #define parport_read_data(p)               parport_pc_read_data(p)
 539 #define parport_write_control(p,x)         parport_pc_write_control(p,x)
 540 #define parport_read_control(p)            parport_pc_read_control(p)
 541 #define parport_frob_control(p,m,v)        parport_pc_frob_control(p,m,v)
 542 #define parport_read_status(p)             parport_pc_read_status(p)
 543 #define parport_enable_irq(p)              parport_pc_enable_irq(p)
 544 #define parport_disable_irq(p)             parport_pc_disable_irq(p)
 545 #define parport_data_forward(p)            parport_pc_data_forward(p)
 546 #define parport_data_reverse(p)            parport_pc_data_reverse(p)
 547
 548 #else  /*  !CONFIG_PARPORT_NOT_PC  */
 549
 550 /* Generic operations vector through the dispatch table. */
 551 #define parport_write_data(p,x)            (p)->ops->write_data(p,x)
 552 #define parport_read_data(p)               (p)->ops->read_data(p)
 553 #define parport_write_control(p,x)         (p)->ops->write_control(p,x)
 554 #define parport_read_control(p)            (p)->ops->read_control(p)
 555 #define parport_frob_control(p,m,v)        (p)->ops->frob_control(p,m,v)
 556 #define parport_read_status(p)             (p)->ops->read_status(p)
 557 #define parport_enable_irq(p)              (p)->ops->enable_irq(p)
 558 #define parport_disable_irq(p)             (p)->ops->disable_irq(p)
 559 #define parport_data_forward(p)            (p)->ops->data_forward(p)
 560 #define parport_data_reverse(p)            (p)->ops->data_reverse(p)
 561
 562 #endif /*  !CONFIG_PARPORT_NOT_PC  */
 563
 564 #endif /* __KERNEL__ */
 565 #endif /* _PARPORT_H_ */