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