2 include/linux/comedidev.h
3 header file for kernel-only structures, variables, and constants
5 COMEDI - Linux Control and Measurement Device Interface
6 Copyright (C) 1997-2000 David A. Schleef <ds@schleef.org>
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.
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.
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.
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/kdev_t.h>
30 #include <linux/slab.h>
31 #include <linux/errno.h>
32 #include <linux/spinlock.h>
33 #include <linux/mutex.h>
34 #include <linux/wait.h>
36 #include <linux/init.h>
37 #include <linux/vmalloc.h>
38 #include "interrupt.h"
39 #include <linux/dma-mapping.h>
40 #include <linux/uaccess.h>
45 #define DPRINTK(format, args...) do { \
47 printk(KERN_DEBUG "comedi: " format , ## args); \
50 #define COMEDI_VERSION(a, b, c) (((a) << 16) + ((b) << 8) + (c))
51 #define COMEDI_VERSION_CODE COMEDI_VERSION(COMEDI_MAJORVERSION, COMEDI_MINORVERSION, COMEDI_MICROVERSION)
52 #define COMEDI_RELEASE VERSION
54 #define COMEDI_INITCLEANUP_NOMODULE(x) \
55 static int __init x ## _init_module(void) \
56 {return comedi_driver_register(&(x)); } \
57 static void __exit x ## _cleanup_module(void) \
58 {comedi_driver_unregister(&(x)); } \
59 module_init(x ## _init_module); \
60 module_exit(x ## _cleanup_module); \
62 #define COMEDI_MODULE_MACROS \
63 MODULE_AUTHOR("Comedi http://www.comedi.org"); \
64 MODULE_DESCRIPTION("Comedi low-level driver"); \
65 MODULE_LICENSE("GPL"); \
67 #define COMEDI_INITCLEANUP(x) \
68 COMEDI_MODULE_MACROS \
69 COMEDI_INITCLEANUP_NOMODULE(x)
71 #define COMEDI_PCI_INITCLEANUP_NOMODULE(comedi_driver, pci_id_table) \
72 static int __devinit comedi_driver ## _pci_probe(struct pci_dev *dev, \
73 const struct pci_device_id *ent) \
75 return comedi_pci_auto_config(dev, comedi_driver.driver_name); \
77 static void __devexit comedi_driver ## _pci_remove(struct pci_dev *dev) \
79 comedi_pci_auto_unconfig(dev); \
81 static struct pci_driver comedi_driver ## _pci_driver = \
83 .id_table = pci_id_table, \
84 .probe = &comedi_driver ## _pci_probe, \
85 .remove = __devexit_p(&comedi_driver ## _pci_remove) \
87 static int __init comedi_driver ## _init_module(void) \
90 retval = comedi_driver_register(&comedi_driver); \
93 comedi_driver ## _pci_driver.name = (char *)comedi_driver.driver_name; \
94 return pci_register_driver(&comedi_driver ## _pci_driver); \
96 static void __exit comedi_driver ## _cleanup_module(void) \
98 pci_unregister_driver(&comedi_driver ## _pci_driver); \
99 comedi_driver_unregister(&comedi_driver); \
101 module_init(comedi_driver ## _init_module); \
102 module_exit(comedi_driver ## _cleanup_module);
104 #define COMEDI_PCI_INITCLEANUP(comedi_driver, pci_id_table) \
105 COMEDI_MODULE_MACROS \
106 COMEDI_PCI_INITCLEANUP_NOMODULE(comedi_driver, pci_id_table)
108 #define PCI_VENDOR_ID_INOVA 0x104c
109 #define PCI_VENDOR_ID_NATINST 0x1093
110 #define PCI_VENDOR_ID_DATX 0x1116
111 #define PCI_VENDOR_ID_COMPUTERBOARDS 0x1307
112 #define PCI_VENDOR_ID_ADVANTECH 0x13fe
113 #define PCI_VENDOR_ID_RTD 0x1435
114 #define PCI_VENDOR_ID_AMPLICON 0x14dc
115 #define PCI_VENDOR_ID_ADLINK 0x144a
116 #define PCI_VENDOR_ID_ICP 0x104c
117 #define PCI_VENDOR_ID_CONTEC 0x1221
118 #define PCI_VENDOR_ID_MEILHAUS 0x1402
120 #define COMEDI_NUM_MINORS 0x100
121 #define COMEDI_NUM_BOARD_MINORS 0x30
122 #define COMEDI_FIRST_SUBDEVICE_MINOR COMEDI_NUM_BOARD_MINORS
124 typedef struct comedi_subdevice_struct comedi_subdevice;
125 typedef struct comedi_async_struct comedi_async;
126 typedef struct comedi_driver_struct comedi_driver;
127 typedef struct comedi_lrange_struct comedi_lrange;
129 typedef struct device device_create_result_type;
131 #define COMEDI_DEVICE_CREATE(cs, parent, devt, drvdata, device, fmt...) \
132 device_create(cs, ((parent) ? (parent) : (device)), devt, drvdata, fmt)
134 struct comedi_subdevice_struct {
135 struct comedi_device *device;
138 volatile int subdev_flags;
139 int len_chanlist; /* maximum length of channel/gain list */
148 spinlock_t spin_lock;
152 unsigned int maxdata; /* if maxdata==0, use list */
153 const unsigned int *maxdata_list; /* list is channel specific */
156 const unsigned int *flaglist;
158 unsigned int settling_time_0;
160 const comedi_lrange *range_table;
161 const comedi_lrange *const *range_table_list;
163 unsigned int *chanlist; /* driver-owned chanlist (not used) */
165 int (*insn_read) (struct comedi_device *, comedi_subdevice *, comedi_insn *,
167 int (*insn_write) (struct comedi_device *, comedi_subdevice *, comedi_insn *,
169 int (*insn_bits) (struct comedi_device *, comedi_subdevice *, comedi_insn *,
171 int (*insn_config) (struct comedi_device *, comedi_subdevice *, comedi_insn *,
174 int (*do_cmd) (struct comedi_device *, comedi_subdevice *);
175 int (*do_cmdtest) (struct comedi_device *, comedi_subdevice *, comedi_cmd *);
176 int (*poll) (struct comedi_device *, comedi_subdevice *);
177 int (*cancel) (struct comedi_device *, comedi_subdevice *);
178 /* int (*do_lock)(struct comedi_device *,comedi_subdevice *); */
179 /* int (*do_unlock)(struct comedi_device *,comedi_subdevice *); */
181 /* called when the buffer changes */
182 int (*buf_change) (struct comedi_device *dev, comedi_subdevice *s,
183 unsigned long new_size);
185 void (*munge) (struct comedi_device *dev, comedi_subdevice *s, void *data,
186 unsigned int num_bytes, unsigned int start_chan_index);
187 enum dma_data_direction async_dma_dir;
191 device_create_result_type *class_dev;
195 struct comedi_buf_page {
200 struct comedi_async_struct {
201 comedi_subdevice *subdevice;
203 void *prealloc_buf; /* pre-allocated buffer */
204 unsigned int prealloc_bufsz; /* buffer size, in bytes */
205 struct comedi_buf_page *buf_page_list; /* virtual and dma address of each page */
206 unsigned n_buf_pages; /* num elements in buf_page_list */
208 unsigned int max_bufsize; /* maximum buffer size, bytes */
209 unsigned int mmap_count; /* current number of mmaps of prealloc_buf */
211 unsigned int buf_write_count; /* byte count for writer (write completed) */
212 unsigned int buf_write_alloc_count; /* byte count for writer (allocated for writing) */
213 unsigned int buf_read_count; /* byte count for reader (read completed) */
214 unsigned int buf_read_alloc_count; /* byte count for reader (allocated for reading) */
216 unsigned int buf_write_ptr; /* buffer marker for writer */
217 unsigned int buf_read_ptr; /* buffer marker for reader */
219 unsigned int cur_chan; /* useless channel marker for interrupt */
220 /* number of bytes that have been received for current scan */
221 unsigned int scan_progress;
222 /* keeps track of where we are in chanlist as for munging */
223 unsigned int munge_chan;
224 /* number of bytes that have been munged */
225 unsigned int munge_count;
226 /* buffer marker for munging */
227 unsigned int munge_ptr;
229 unsigned int events; /* events that have occurred */
233 wait_queue_head_t wait_head;
236 unsigned int cb_mask;
237 int (*cb_func) (unsigned int flags, void *);
240 int (*inttrig) (struct comedi_device *dev, comedi_subdevice *s,
244 struct comedi_driver_struct {
245 struct comedi_driver_struct *next;
247 const char *driver_name;
248 struct module *module;
249 int (*attach) (struct comedi_device *, comedi_devconfig *);
250 int (*detach) (struct comedi_device *);
252 /* number of elements in board_name and board_id arrays */
253 unsigned int num_names;
254 const char *const *board_name;
255 /* offset in bytes from one board name pointer to the next */
259 struct comedi_device {
261 comedi_driver *driver;
264 device_create_result_type *class_dev;
266 /* hw_dev is passed to dma_alloc_coherent when allocating async buffers
267 * for subdevices that have async_dma_dir set to something other than
269 struct device *hw_dev;
271 const char *board_name;
272 const void *board_ptr;
277 int in_request_module;
280 comedi_subdevice *subdevices;
283 unsigned long iobase;
286 comedi_subdevice *read_subdev;
287 comedi_subdevice *write_subdev;
289 struct fasync_struct *async_queue;
291 void (*open) (struct comedi_device *dev);
292 void (*close) (struct comedi_device *dev);
295 struct comedi_device_file_info {
296 struct comedi_device *device;
297 comedi_subdevice *read_subdevice;
298 comedi_subdevice *write_subdevice;
301 #ifdef CONFIG_COMEDI_DEBUG
302 extern int comedi_debug;
304 static const int comedi_debug;
308 * function prototypes
311 void comedi_event(struct comedi_device *dev, comedi_subdevice *s);
312 void comedi_error(const struct comedi_device *dev, const char *s);
314 /* we can expand the number of bits used to encode devices/subdevices into
315 the minor number soon, after more distros support > 8 bit minor numbers
316 (like after Debian Etch gets released) */
317 enum comedi_minor_bits {
318 COMEDI_DEVICE_MINOR_MASK = 0xf,
319 COMEDI_SUBDEVICE_MINOR_MASK = 0xf0
321 static const unsigned COMEDI_SUBDEVICE_MINOR_SHIFT = 4;
322 static const unsigned COMEDI_SUBDEVICE_MINOR_OFFSET = 1;
324 struct comedi_device_file_info *comedi_get_device_file_info(unsigned minor);
326 static inline comedi_subdevice *comedi_get_read_subdevice(
327 const struct comedi_device_file_info *info)
329 if (info->read_subdevice)
330 return info->read_subdevice;
331 if (info->device == NULL)
333 return info->device->read_subdev;
336 static inline comedi_subdevice *comedi_get_write_subdevice(
337 const struct comedi_device_file_info *info)
339 if (info->write_subdevice)
340 return info->write_subdevice;
341 if (info->device == NULL)
343 return info->device->write_subdev;
346 void comedi_device_detach(struct comedi_device *dev);
347 int comedi_device_attach(struct comedi_device *dev, comedi_devconfig *it);
348 int comedi_driver_register(comedi_driver *);
349 int comedi_driver_unregister(comedi_driver *);
351 void init_polling(void);
352 void cleanup_polling(void);
353 void start_polling(struct comedi_device *);
354 void stop_polling(struct comedi_device *);
356 int comedi_buf_alloc(struct comedi_device *dev, comedi_subdevice *s, unsigned long
359 #ifdef CONFIG_PROC_FS
360 void comedi_proc_init(void);
361 void comedi_proc_cleanup(void);
363 static inline void comedi_proc_init(void)
366 static inline void comedi_proc_cleanup(void)
371 /* subdevice runflags */
372 enum subdevice_runflags {
373 SRF_USER = 0x00000001,
375 /* indicates an COMEDI_CB_ERROR event has occurred since the last
376 * command was started */
377 SRF_ERROR = 0x00000004,
378 SRF_RUNNING = 0x08000000
382 various internal comedi functions
385 int do_rangeinfo_ioctl(struct comedi_device *dev, comedi_rangeinfo *arg);
386 int check_chanlist(comedi_subdevice *s, int n, unsigned int *chanlist);
387 void comedi_set_subdevice_runflags(comedi_subdevice *s, unsigned mask,
389 unsigned comedi_get_subdevice_runflags(comedi_subdevice *s);
390 int insn_inval(struct comedi_device *dev, comedi_subdevice *s,
391 comedi_insn *insn, unsigned int *data);
395 #define RANGE(a, b) {(a)*1e6, (b)*1e6, 0}
396 #define RANGE_ext(a, b) {(a)*1e6, (b)*1e6, RF_EXTERNAL}
397 #define RANGE_mA(a, b) {(a)*1e6, (b)*1e6, UNIT_mA}
398 #define RANGE_unitless(a, b) {(a)*1e6, (b)*1e6, 0} /* XXX */
399 #define BIP_RANGE(a) {-(a)*1e6, (a)*1e6, 0}
400 #define UNI_RANGE(a) {0, (a)*1e6, 0}
402 extern const comedi_lrange range_bipolar10;
403 extern const comedi_lrange range_bipolar5;
404 extern const comedi_lrange range_bipolar2_5;
405 extern const comedi_lrange range_unipolar10;
406 extern const comedi_lrange range_unipolar5;
407 extern const comedi_lrange range_unknown;
409 #define range_digital range_unipolar5
412 #define GCC_ZERO_LENGTH_ARRAY
414 #define GCC_ZERO_LENGTH_ARRAY 0
417 struct comedi_lrange_struct {
419 comedi_krange range[GCC_ZERO_LENGTH_ARRAY];
422 /* some silly little inline functions */
424 static inline int alloc_subdevices(struct comedi_device *dev,
425 unsigned int num_subdevices)
429 dev->n_subdevices = num_subdevices;
431 kcalloc(num_subdevices, sizeof(comedi_subdevice), GFP_KERNEL);
432 if (!dev->subdevices)
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;
443 static inline int alloc_private(struct comedi_device *dev, int size)
445 dev->private = kzalloc(size, GFP_KERNEL);
451 static inline unsigned int bytes_per_sample(const comedi_subdevice *subd)
453 if (subd->subdev_flags & SDF_LSAMPL)
454 return sizeof(unsigned int);
456 return sizeof(short);
459 /* must be used in attach to set dev->hw_dev if you wish to dma directly
460 into comedi's buffer */
461 static inline void comedi_set_hw_dev(struct comedi_device *dev, struct device *hw_dev)
464 put_device(dev->hw_dev);
466 dev->hw_dev = hw_dev;
468 dev->hw_dev = get_device(dev->hw_dev);
469 BUG_ON(dev->hw_dev == NULL);
473 int comedi_buf_put(comedi_async *async, short x);
474 int comedi_buf_get(comedi_async *async, short *x);
476 unsigned int comedi_buf_write_n_available(comedi_async *async);
477 unsigned int comedi_buf_write_alloc(comedi_async *async, unsigned int nbytes);
478 unsigned int comedi_buf_write_alloc_strict(comedi_async *async,
479 unsigned int nbytes);
480 unsigned comedi_buf_write_free(comedi_async *async, unsigned int nbytes);
481 unsigned comedi_buf_read_alloc(comedi_async *async, unsigned nbytes);
482 unsigned comedi_buf_read_free(comedi_async *async, unsigned int nbytes);
483 unsigned int comedi_buf_read_n_available(comedi_async *async);
484 void comedi_buf_memcpy_to(comedi_async *async, unsigned int offset,
485 const void *source, unsigned int num_bytes);
486 void comedi_buf_memcpy_from(comedi_async *async, unsigned int offset,
487 void *destination, unsigned int num_bytes);
488 static inline unsigned comedi_buf_write_n_allocated(comedi_async *async)
490 return async->buf_write_alloc_count - async->buf_write_count;
492 static inline unsigned comedi_buf_read_n_allocated(comedi_async *async)
494 return async->buf_read_alloc_count - async->buf_read_count;
497 void comedi_reset_async_buf(comedi_async *async);
499 static inline void *comedi_aux_data(int options[], int n)
501 unsigned long address;
502 unsigned long addressLow;
504 if (sizeof(int) >= sizeof(void *))
505 address = options[COMEDI_DEVCONF_AUX_DATA_LO];
507 address = options[COMEDI_DEVCONF_AUX_DATA_HI];
508 bit_shift = sizeof(int) * 8;
509 address <<= bit_shift;
510 addressLow = options[COMEDI_DEVCONF_AUX_DATA_LO];
511 addressLow &= (1UL << bit_shift) - 1;
512 address |= addressLow;
515 address += options[COMEDI_DEVCONF_AUX_DATA0_LENGTH];
517 address += options[COMEDI_DEVCONF_AUX_DATA1_LENGTH];
519 address += options[COMEDI_DEVCONF_AUX_DATA2_LENGTH];
521 return (void *)address;
524 int comedi_alloc_board_minor(struct device *hardware_device);
525 void comedi_free_board_minor(unsigned minor);
526 int comedi_alloc_subdevice_minor(struct comedi_device *dev, comedi_subdevice *s);
527 void comedi_free_subdevice_minor(comedi_subdevice *s);
528 int comedi_pci_auto_config(struct pci_dev *pcidev, const char *board_name);
529 void comedi_pci_auto_unconfig(struct pci_dev *pcidev);
530 struct usb_device; /* forward declaration */
531 int comedi_usb_auto_config(struct usb_device *usbdev, const char *board_name);
532 void comedi_usb_auto_unconfig(struct usb_device *usbdev);
534 #include "comedi_rt.h"
536 #endif /* _COMEDIDEV_H */