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