LXR linux-old/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.  */
  39typedef 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. */
 110struct parport;
 111struct pardevice;
 112
 113struct pc_parport_state {
 114        unsigned int ctr;
 115        unsigned int ecr;
 116};
 117
 118struct 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 */
 125struct 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
 132struct 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
 143struct 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
 196struct 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 */
 218struct 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 */
 243enum 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};
 257struct ieee1284_info {
 258        int mode;
 259        volatile enum ieee1284_phase phase;
 260        struct semaphore irq;
 261};
 262
 263/* A parallel port */
 264struct 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
 319struct 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. */
 330struct 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). */
 338void parport_announce_port (struct parport *port);
 339
 340/* Unregister a port. */
 341extern 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. */
 346struct parport *parport_enumerate(void);
 347
 348/* Register a new high-level driver. */
 349extern int parport_register_driver (struct parport_driver *);
 350
 351/* Unregister a high-level driver. */
 352extern void parport_unregister_driver (struct parport_driver *);
 353
 354/* If parport_register_driver doesn't fit your needs, perhaps
 355 * parport_find_xxx does. */
 356extern struct parport *parport_find_number (int);
 357extern struct parport *parport_find_base (unsigned long);
 358
 359/* Reference counting for ports. */
 360extern struct parport *parport_get_port (struct parport *);
 361extern 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.  */
 369struct 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. */
 376extern 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.  */
 382extern 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.  */
 387extern 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
 397extern 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 **/
 419static __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 **/
 437static __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
 453extern int parport_parse_irqs(int, const char *[], int irqval[]);
 454extern int parport_parse_dmas(int, const char *[], int dmaval[]);
 455
 456/* IEEE1284 functions */
 457extern void parport_ieee1284_interrupt (int, void *, struct pt_regs *);
 458extern int parport_negotiate (struct parport *, int mode);
 459extern ssize_t parport_write (struct parport *, const void *buf, size_t len);
 460extern ssize_t parport_read (struct parport *, void *buf, size_t len);
 461
 462#define PARPORT_INACTIVITY_O_NONBLOCK 1
 463extern long parport_set_timeout (struct pardevice *, long inactivity);
 464
 465extern int parport_wait_event (struct parport *, long timeout);
 466extern int parport_wait_peripheral (struct parport *port,
 467                                    unsigned char mask,
 468                                    unsigned char val);
 469extern int parport_poll_peripheral (struct parport *port,
 470                                    unsigned char mask,
 471                                    unsigned char val,
 472                                    int usec);
 473
 474/* For architectural drivers */
 475extern void parport_ieee1284_wakeup (struct parport *port);
 476extern size_t parport_ieee1284_write_compat (struct parport *,
 477                                             const void *, size_t, int);
 478extern size_t parport_ieee1284_read_nibble (struct parport *,
 479                                            void *, size_t, int);
 480extern size_t parport_ieee1284_read_byte (struct parport *,
 481                                          void *, size_t, int);
 482extern size_t parport_ieee1284_ecp_read_data (struct parport *,
 483                                              void *, size_t, int);
 484extern size_t parport_ieee1284_ecp_write_data (struct parport *,
 485                                               const void *, size_t, int);
 486extern size_t parport_ieee1284_ecp_write_addr (struct parport *,
 487                                               const void *, size_t, int);
 488extern size_t parport_ieee1284_epp_write_data (struct parport *,
 489                                               const void *, size_t, int);
 490extern size_t parport_ieee1284_epp_read_data (struct parport *,
 491                                              void *, size_t, int);
 492extern size_t parport_ieee1284_epp_write_addr (struct parport *,
 493                                               const void *, size_t, int);
 494extern size_t parport_ieee1284_epp_read_addr (struct parport *,
 495                                              void *, size_t, int);
 496
 497/* IEEE1284.3 functions */
 498extern int parport_daisy_init (struct parport *port);
 499extern void parport_daisy_fini (struct parport *port);
 500extern 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);
 506extern void parport_close (struct pardevice *dev);
 507extern ssize_t parport_device_id (int devnum, char *buffer, size_t len);
 508extern int parport_device_num (int parport, int mux, int daisy);
 509extern int parport_device_coords (int devnum, int *parport, int *mux,
 510                                  int *daisy);
 511extern void parport_daisy_deselect_all (struct parport *port);
 512extern 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*/
 521extern int parport_find_device (const char *mfg, const char *mdl, int from);
 522extern int parport_find_class (parport_device_class cls, int from);
 523
 524/* Lowlevel drivers _can_ call this support function to handle irqs.  */
 525static __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 */
 536extern int parport_proc_register(struct parport *pp);
 537extern int parport_proc_unregister(struct parport *pp);
 538extern int parport_device_proc_register(struct pardevice *device);
 539extern int parport_device_proc_unregister(struct pardevice *device);
 540extern int parport_default_proc_register(void);
 541extern int parport_default_proc_unregister(void);
 542
 543extern void dec_parport_count(void);
 544extern 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