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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;
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;
147 const unsigned int *maxdata_list;
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;
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
174
175
176
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;
200 unsigned int prealloc_bufsz;
201 struct comedi_buf_page *buf_page_list;
202 unsigned n_buf_pages;
203
204 unsigned int max_bufsize;
205 unsigned int mmap_count;
206
207 unsigned int buf_write_count;
208 unsigned int buf_write_alloc_count;
209 unsigned int buf_read_count;
210 unsigned int buf_read_alloc_count;
211
212 unsigned int buf_write_ptr;
213 unsigned int buf_read_ptr;
214
215 unsigned int cur_chan;
216
217 unsigned int scan_progress;
218
219 unsigned int munge_chan;
220
221 unsigned int munge_count;
222
223 unsigned int munge_ptr;
224
225 unsigned int events;
226
227 struct comedi_cmd cmd;
228
229 wait_queue_head_t wait_head;
230
231
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
249 unsigned int num_names;
250 const char *const *board_name;
251
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
263
264
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
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
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
310
311
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
371enum subdevice_runflags {
372 SRF_USER = 0x00000001,
373 SRF_RT = 0x00000002,
374
375
376 SRF_ERROR = 0x00000004,
377 SRF_RUNNING = 0x08000000
378};
379
380
381
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
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}
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
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
460
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;
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
552
