comedidev.h revision 0a85b6f0ab0d2edb0d41b32697111ce0e4f43496
1/* 2 include/linux/comedidev.h 3 header file for kernel-only structures, variables, and constants 4 5 COMEDI - Linux Control and Measurement Device Interface 6 Copyright (C) 1997-2000 David A. Schleef <ds@schleef.org> 7 8 This program is free software; you can redistribute it and/or modify 9 it under the terms of the GNU General Public License as published by 10 the Free Software Foundation; either version 2 of the License, or 11 (at your option) any later version. 12 13 This program is distributed in the hope that it will be useful, 14 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 GNU General Public License for more details. 17 18 You should have received a copy of the GNU General Public License 19 along with this program; if not, write to the Free Software 20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 21 22*/ 23 24#ifndef _COMEDIDEV_H 25#define _COMEDIDEV_H 26 27#include <linux/kernel.h> 28#include <linux/module.h> 29#include <linux/kdev_t.h> 30#include <linux/slab.h> 31#include <linux/delay.h> 32#include <linux/errno.h> 33#include <linux/spinlock.h> 34#include <linux/mutex.h> 35#include <linux/wait.h> 36#include <linux/mm.h> 37#include <linux/init.h> 38#include <linux/vmalloc.h> 39#include <linux/dma-mapping.h> 40#include <linux/uaccess.h> 41#include <linux/io.h> 42#include <linux/timer.h> 43 44#include "comedi.h" 45 46#define DPRINTK(format, args...) do { \ 47 if (comedi_debug) \ 48 printk(KERN_DEBUG "comedi: " format , ## args); \ 49} while (0) 50 51#define COMEDI_VERSION(a, b, c) (((a) << 16) + ((b) << 8) + (c)) 52#define COMEDI_VERSION_CODE COMEDI_VERSION(COMEDI_MAJORVERSION, COMEDI_MINORVERSION, COMEDI_MICROVERSION) 53#define COMEDI_RELEASE VERSION 54 55#define COMEDI_INITCLEANUP_NOMODULE(x) \ 56 static int __init x ## _init_module(void) \ 57 {return comedi_driver_register(&(x)); } \ 58 static void __exit x ## _cleanup_module(void) \ 59 {comedi_driver_unregister(&(x)); } \ 60 module_init(x ## _init_module); \ 61 module_exit(x ## _cleanup_module); \ 62 63#define COMEDI_MODULE_MACROS \ 64 MODULE_AUTHOR("Comedi http://www.comedi.org"); \ 65 MODULE_DESCRIPTION("Comedi low-level driver"); \ 66 MODULE_LICENSE("GPL"); \ 67 68#define COMEDI_INITCLEANUP(x) \ 69 COMEDI_MODULE_MACROS \ 70 COMEDI_INITCLEANUP_NOMODULE(x) 71 72#define COMEDI_PCI_INITCLEANUP_NOMODULE(comedi_driver, pci_id_table) \ 73 static int __devinit comedi_driver ## _pci_probe(struct pci_dev *dev, \ 74 const struct pci_device_id *ent) \ 75 { \ 76 return comedi_pci_auto_config(dev, comedi_driver.driver_name); \ 77 } \ 78 static void __devexit comedi_driver ## _pci_remove(struct pci_dev *dev) \ 79 { \ 80 comedi_pci_auto_unconfig(dev); \ 81 } \ 82 static struct pci_driver comedi_driver ## _pci_driver = \ 83 { \ 84 .id_table = pci_id_table, \ 85 .probe = &comedi_driver ## _pci_probe, \ 86 .remove = __devexit_p(&comedi_driver ## _pci_remove) \ 87 }; \ 88 static int __init comedi_driver ## _init_module(void) \ 89 { \ 90 int retval; \ 91 retval = comedi_driver_register(&comedi_driver); \ 92 if (retval < 0) \ 93 return retval; \ 94 comedi_driver ## _pci_driver.name = (char *)comedi_driver.driver_name; \ 95 return pci_register_driver(&comedi_driver ## _pci_driver); \ 96 } \ 97 static void __exit comedi_driver ## _cleanup_module(void) \ 98 { \ 99 pci_unregister_driver(&comedi_driver ## _pci_driver); \ 100 comedi_driver_unregister(&comedi_driver); \ 101 } \ 102 module_init(comedi_driver ## _init_module); \ 103 module_exit(comedi_driver ## _cleanup_module); 104 105#define COMEDI_PCI_INITCLEANUP(comedi_driver, pci_id_table) \ 106 COMEDI_MODULE_MACROS \ 107 COMEDI_PCI_INITCLEANUP_NOMODULE(comedi_driver, pci_id_table) 108 109#define PCI_VENDOR_ID_INOVA 0x104c 110#define PCI_VENDOR_ID_NATINST 0x1093 111#define PCI_VENDOR_ID_DATX 0x1116 112#define PCI_VENDOR_ID_COMPUTERBOARDS 0x1307 113#define PCI_VENDOR_ID_ADVANTECH 0x13fe 114#define PCI_VENDOR_ID_RTD 0x1435 115#define PCI_VENDOR_ID_AMPLICON 0x14dc 116#define PCI_VENDOR_ID_ADLINK 0x144a 117#define PCI_VENDOR_ID_ICP 0x104c 118#define PCI_VENDOR_ID_CONTEC 0x1221 119#define PCI_VENDOR_ID_MEILHAUS 0x1402 120 121#define COMEDI_NUM_MINORS 0x100 122#define COMEDI_NUM_BOARD_MINORS 0x30 123#define COMEDI_FIRST_SUBDEVICE_MINOR COMEDI_NUM_BOARD_MINORS 124 125#define COMEDI_DEVICE_CREATE(cs, parent, devt, drvdata, device, fmt...) \ 126 device_create(cs, ((parent) ? (parent) : (device)), devt, drvdata, fmt) 127 128struct comedi_subdevice { 129 struct comedi_device *device; 130 int type; 131 int n_chan; 132 volatile int subdev_flags; 133 int len_chanlist; /* maximum length of channel/gain list */ 134 135 void *private; 136 137 struct comedi_async *async; 138 139 void *lock; 140 void *busy; 141 unsigned runflags; 142 spinlock_t spin_lock; 143 144 int io_bits; 145 146 unsigned int maxdata; /* if maxdata==0, use list */ 147 const unsigned int *maxdata_list; /* list is channel specific */ 148 149 unsigned int flags; 150 const unsigned int *flaglist; 151 152 unsigned int settling_time_0; 153 154 const struct comedi_lrange *range_table; 155 const struct comedi_lrange *const *range_table_list; 156 157 unsigned int *chanlist; /* driver-owned chanlist (not used) */ 158 159 int (*insn_read) (struct comedi_device *, struct comedi_subdevice *, 160 struct comedi_insn *, unsigned int *); 161 int (*insn_write) (struct comedi_device *, struct comedi_subdevice *, 162 struct comedi_insn *, unsigned int *); 163 int (*insn_bits) (struct comedi_device *, struct comedi_subdevice *, 164 struct comedi_insn *, unsigned int *); 165 int (*insn_config) (struct comedi_device *, struct comedi_subdevice *, 166 struct comedi_insn *, unsigned int *); 167 168 int (*do_cmd) (struct comedi_device *, struct comedi_subdevice *); 169 int (*do_cmdtest) (struct comedi_device *, struct comedi_subdevice *, 170 struct comedi_cmd *); 171 int (*poll) (struct comedi_device *, struct comedi_subdevice *); 172 int (*cancel) (struct comedi_device *, struct comedi_subdevice *); 173 /* int (*do_lock)(struct comedi_device *,struct comedi_subdevice *); */ 174 /* int (*do_unlock)(struct comedi_device *,struct comedi_subdevice *); */ 175 176 /* called when the buffer changes */ 177 int (*buf_change) (struct comedi_device * dev, 178 struct comedi_subdevice * s, unsigned long new_size); 179 180 void (*munge) (struct comedi_device * dev, struct comedi_subdevice * s, 181 void *data, unsigned int num_bytes, 182 unsigned int start_chan_index); 183 enum dma_data_direction async_dma_dir; 184 185 unsigned int state; 186 187 struct device *class_dev; 188 int minor; 189}; 190 191struct comedi_buf_page { 192 void *virt_addr; 193 dma_addr_t dma_addr; 194}; 195 196struct comedi_async { 197 struct comedi_subdevice *subdevice; 198 199 void *prealloc_buf; /* pre-allocated buffer */ 200 unsigned int prealloc_bufsz; /* buffer size, in bytes */ 201 struct comedi_buf_page *buf_page_list; /* virtual and dma address of each page */ 202 unsigned n_buf_pages; /* num elements in buf_page_list */ 203 204 unsigned int max_bufsize; /* maximum buffer size, bytes */ 205 unsigned int mmap_count; /* current number of mmaps of prealloc_buf */ 206 207 unsigned int buf_write_count; /* byte count for writer (write completed) */ 208 unsigned int buf_write_alloc_count; /* byte count for writer (allocated for writing) */ 209 unsigned int buf_read_count; /* byte count for reader (read completed) */ 210 unsigned int buf_read_alloc_count; /* byte count for reader (allocated for reading) */ 211 212 unsigned int buf_write_ptr; /* buffer marker for writer */ 213 unsigned int buf_read_ptr; /* buffer marker for reader */ 214 215 unsigned int cur_chan; /* useless channel marker for interrupt */ 216 /* number of bytes that have been received for current scan */ 217 unsigned int scan_progress; 218 /* keeps track of where we are in chanlist as for munging */ 219 unsigned int munge_chan; 220 /* number of bytes that have been munged */ 221 unsigned int munge_count; 222 /* buffer marker for munging */ 223 unsigned int munge_ptr; 224 225 unsigned int events; /* events that have occurred */ 226 227 struct comedi_cmd cmd; 228 229 wait_queue_head_t wait_head; 230 231 /* callback stuff */ 232 unsigned int cb_mask; 233 int (*cb_func) (unsigned int flags, void *); 234 void *cb_arg; 235 236 int (*inttrig) (struct comedi_device * dev, struct comedi_subdevice * s, 237 unsigned int x); 238}; 239 240struct comedi_driver { 241 struct comedi_driver *next; 242 243 const char *driver_name; 244 struct module *module; 245 int (*attach) (struct comedi_device *, struct comedi_devconfig *); 246 int (*detach) (struct comedi_device *); 247 248 /* number of elements in board_name and board_id arrays */ 249 unsigned int num_names; 250 const char *const *board_name; 251 /* offset in bytes from one board name pointer to the next */ 252 int offset; 253}; 254 255struct comedi_device { 256 int use_count; 257 struct comedi_driver *driver; 258 void *private; 259 260 struct device *class_dev; 261 int minor; 262 /* hw_dev is passed to dma_alloc_coherent when allocating async buffers 263 * for subdevices that have async_dma_dir set to something other than 264 * DMA_NONE */ 265 struct device *hw_dev; 266 267 const char *board_name; 268 const void *board_ptr; 269 int attached; 270 spinlock_t spinlock; 271 struct mutex mutex; 272 int in_request_module; 273 274 int n_subdevices; 275 struct comedi_subdevice *subdevices; 276 277 /* dumb */ 278 unsigned long iobase; 279 unsigned int irq; 280 281 struct comedi_subdevice *read_subdev; 282 struct comedi_subdevice *write_subdev; 283 284 struct fasync_struct *async_queue; 285 286 void (*open) (struct comedi_device * dev); 287 void (*close) (struct comedi_device * dev); 288}; 289 290struct comedi_device_file_info { 291 struct comedi_device *device; 292 struct comedi_subdevice *read_subdevice; 293 struct comedi_subdevice *write_subdevice; 294}; 295 296#ifdef CONFIG_COMEDI_DEBUG 297extern int comedi_debug; 298#else 299static const int comedi_debug; 300#endif 301 302/* 303 * function prototypes 304 */ 305 306void comedi_event(struct comedi_device *dev, struct comedi_subdevice *s); 307void comedi_error(const struct comedi_device *dev, const char *s); 308 309/* we can expand the number of bits used to encode devices/subdevices into 310 the minor number soon, after more distros support > 8 bit minor numbers 311 (like after Debian Etch gets released) */ 312enum comedi_minor_bits { 313 COMEDI_DEVICE_MINOR_MASK = 0xf, 314 COMEDI_SUBDEVICE_MINOR_MASK = 0xf0 315}; 316static const unsigned COMEDI_SUBDEVICE_MINOR_SHIFT = 4; 317static const unsigned COMEDI_SUBDEVICE_MINOR_OFFSET = 1; 318 319struct comedi_device_file_info *comedi_get_device_file_info(unsigned minor); 320 321static inline struct comedi_subdevice *comedi_get_read_subdevice(const struct 322 comedi_device_file_info 323 *info) 324{ 325 if (info->read_subdevice) 326 return info->read_subdevice; 327 if (info->device == NULL) 328 return NULL; 329 return info->device->read_subdev; 330} 331 332static inline struct comedi_subdevice *comedi_get_write_subdevice(const struct 333 comedi_device_file_info 334 *info) 335{ 336 if (info->write_subdevice) 337 return info->write_subdevice; 338 if (info->device == NULL) 339 return NULL; 340 return info->device->write_subdev; 341} 342 343void comedi_device_detach(struct comedi_device *dev); 344int comedi_device_attach(struct comedi_device *dev, 345 struct comedi_devconfig *it); 346int comedi_driver_register(struct comedi_driver *); 347int comedi_driver_unregister(struct comedi_driver *); 348 349void init_polling(void); 350void cleanup_polling(void); 351void start_polling(struct comedi_device *); 352void stop_polling(struct comedi_device *); 353 354int comedi_buf_alloc(struct comedi_device *dev, struct comedi_subdevice *s, 355 unsigned long new_size); 356 357#ifdef CONFIG_PROC_FS 358void comedi_proc_init(void); 359void comedi_proc_cleanup(void); 360#else 361static inline void comedi_proc_init(void) 362{ 363} 364 365static inline void comedi_proc_cleanup(void) 366{ 367} 368#endif 369 370/* subdevice runflags */ 371enum subdevice_runflags { 372 SRF_USER = 0x00000001, 373 SRF_RT = 0x00000002, 374 /* indicates an COMEDI_CB_ERROR event has occurred since the last 375 * command was started */ 376 SRF_ERROR = 0x00000004, 377 SRF_RUNNING = 0x08000000 378}; 379 380/* 381 various internal comedi functions 382 */ 383 384int do_rangeinfo_ioctl(struct comedi_device *dev, struct comedi_rangeinfo *arg); 385int check_chanlist(struct comedi_subdevice *s, int n, unsigned int *chanlist); 386void comedi_set_subdevice_runflags(struct comedi_subdevice *s, unsigned mask, 387 unsigned bits); 388unsigned comedi_get_subdevice_runflags(struct comedi_subdevice *s); 389int insn_inval(struct comedi_device *dev, struct comedi_subdevice *s, 390 struct comedi_insn *insn, unsigned int *data); 391 392/* range stuff */ 393 394#define RANGE(a, b) {(a)*1e6, (b)*1e6, 0} 395#define RANGE_ext(a, b) {(a)*1e6, (b)*1e6, RF_EXTERNAL} 396#define RANGE_mA(a, b) {(a)*1e6, (b)*1e6, UNIT_mA} 397#define RANGE_unitless(a, b) {(a)*1e6, (b)*1e6, 0} /* XXX */ 398#define BIP_RANGE(a) {-(a)*1e6, (a)*1e6, 0} 399#define UNI_RANGE(a) {0, (a)*1e6, 0} 400 401extern const struct comedi_lrange range_bipolar10; 402extern const struct comedi_lrange range_bipolar5; 403extern const struct comedi_lrange range_bipolar2_5; 404extern const struct comedi_lrange range_unipolar10; 405extern const struct comedi_lrange range_unipolar5; 406extern const struct comedi_lrange range_unknown; 407 408#define range_digital range_unipolar5 409 410#if __GNUC__ >= 3 411#define GCC_ZERO_LENGTH_ARRAY 412#else 413#define GCC_ZERO_LENGTH_ARRAY 0 414#endif 415 416struct comedi_lrange { 417 int length; 418 struct comedi_krange range[GCC_ZERO_LENGTH_ARRAY]; 419}; 420 421/* some silly little inline functions */ 422 423static inline int alloc_subdevices(struct comedi_device *dev, 424 unsigned int num_subdevices) 425{ 426 unsigned i; 427 428 dev->n_subdevices = num_subdevices; 429 dev->subdevices = 430 kcalloc(num_subdevices, sizeof(struct comedi_subdevice), 431 GFP_KERNEL); 432 if (!dev->subdevices) 433 return -ENOMEM; 434 for (i = 0; i < num_subdevices; ++i) { 435 dev->subdevices[i].device = dev; 436 dev->subdevices[i].async_dma_dir = DMA_NONE; 437 spin_lock_init(&dev->subdevices[i].spin_lock); 438 dev->subdevices[i].minor = -1; 439 } 440 return 0; 441} 442 443static inline int alloc_private(struct comedi_device *dev, int size) 444{ 445 dev->private = kzalloc(size, GFP_KERNEL); 446 if (!dev->private) 447 return -ENOMEM; 448 return 0; 449} 450 451static inline unsigned int bytes_per_sample(const struct comedi_subdevice *subd) 452{ 453 if (subd->subdev_flags & SDF_LSAMPL) 454 return sizeof(unsigned int); 455 else 456 return sizeof(short); 457} 458 459/* must be used in attach to set dev->hw_dev if you wish to dma directly 460into comedi's buffer */ 461static inline void comedi_set_hw_dev(struct comedi_device *dev, 462 struct device *hw_dev) 463{ 464 if (dev->hw_dev) 465 put_device(dev->hw_dev); 466 467 dev->hw_dev = hw_dev; 468 if (dev->hw_dev) { 469 dev->hw_dev = get_device(dev->hw_dev); 470 BUG_ON(dev->hw_dev == NULL); 471 } 472} 473 474int comedi_buf_put(struct comedi_async *async, short x); 475int comedi_buf_get(struct comedi_async *async, short *x); 476 477unsigned int comedi_buf_write_n_available(struct comedi_async *async); 478unsigned int comedi_buf_write_alloc(struct comedi_async *async, 479 unsigned int nbytes); 480unsigned int comedi_buf_write_alloc_strict(struct comedi_async *async, 481 unsigned int nbytes); 482unsigned comedi_buf_write_free(struct comedi_async *async, unsigned int nbytes); 483unsigned comedi_buf_read_alloc(struct comedi_async *async, unsigned nbytes); 484unsigned comedi_buf_read_free(struct comedi_async *async, unsigned int nbytes); 485unsigned int comedi_buf_read_n_available(struct comedi_async *async); 486void comedi_buf_memcpy_to(struct comedi_async *async, unsigned int offset, 487 const void *source, unsigned int num_bytes); 488void comedi_buf_memcpy_from(struct comedi_async *async, unsigned int offset, 489 void *destination, unsigned int num_bytes); 490static inline unsigned comedi_buf_write_n_allocated(struct comedi_async *async) 491{ 492 return async->buf_write_alloc_count - async->buf_write_count; 493} 494 495static inline unsigned comedi_buf_read_n_allocated(struct comedi_async *async) 496{ 497 return async->buf_read_alloc_count - async->buf_read_count; 498} 499 500void comedi_reset_async_buf(struct comedi_async *async); 501 502static inline void *comedi_aux_data(int options[], int n) 503{ 504 unsigned long address; 505 unsigned long addressLow; 506 int bit_shift; 507 if (sizeof(int) >= sizeof(void *)) 508 address = options[COMEDI_DEVCONF_AUX_DATA_LO]; 509 else { 510 address = options[COMEDI_DEVCONF_AUX_DATA_HI]; 511 bit_shift = sizeof(int) * 8; 512 address <<= bit_shift; 513 addressLow = options[COMEDI_DEVCONF_AUX_DATA_LO]; 514 addressLow &= (1UL << bit_shift) - 1; 515 address |= addressLow; 516 } 517 if (n >= 1) 518 address += options[COMEDI_DEVCONF_AUX_DATA0_LENGTH]; 519 if (n >= 2) 520 address += options[COMEDI_DEVCONF_AUX_DATA1_LENGTH]; 521 if (n >= 3) 522 address += options[COMEDI_DEVCONF_AUX_DATA2_LENGTH]; 523 BUG_ON(n > 3); 524 return (void *)address; 525} 526 527int comedi_alloc_board_minor(struct device *hardware_device); 528void comedi_free_board_minor(unsigned minor); 529int comedi_alloc_subdevice_minor(struct comedi_device *dev, 530 struct comedi_subdevice *s); 531void comedi_free_subdevice_minor(struct comedi_subdevice *s); 532int comedi_pci_auto_config(struct pci_dev *pcidev, const char *board_name); 533void comedi_pci_auto_unconfig(struct pci_dev *pcidev); 534struct usb_device; /* forward declaration */ 535int comedi_usb_auto_config(struct usb_device *usbdev, const char *board_name); 536void comedi_usb_auto_unconfig(struct usb_device *usbdev); 537 538#ifdef CONFIG_COMEDI_PCI_DRIVERS 539#define CONFIG_COMEDI_PCI 540#endif 541#ifdef CONFIG_COMEDI_PCI_DRIVERS_MODULE 542#define CONFIG_COMEDI_PCI 543#endif 544#ifdef CONFIG_COMEDI_PCMCIA_DRIVERS 545#define CONFIG_COMEDI_PCMCIA 546#endif 547#ifdef CONFIG_COMEDI_PCMCIA_DRIVERS_MODULE 548#define CONFIG_COMEDI_PCMCIA 549#endif 550 551#endif /* _COMEDIDEV_H */ 552