1 /*
2 comedi/drivers/amplc_dio200.c
3 Driver for Amplicon PC272E and PCI272 DIO boards.
4 (Support for other boards in Amplicon 200 series may be added at
5 a later date, e.g. PCI215.)
6
7 Copyright (C) 2005 MEV Ltd. <http://www.mev.co.uk/>
8
9 COMEDI - Linux Control and Measurement Device Interface
10 Copyright (C) 1998,2000 David A. Schleef <ds@schleef.org>
11
12 This program is free software; you can redistribute it and/or modify
13 it under the terms of the GNU General Public License as published by
14 the Free Software Foundation; either version 2 of the License, or
15 (at your option) any later version.
16
17 This program is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 GNU General Public License for more details.
21
22 You should have received a copy of the GNU General Public License
23 along with this program; if not, write to the Free Software
24 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25
26 */
27 /*
28 Driver: amplc_dio200
29 Description: Amplicon 200 Series Digital I/O
30 Author: Ian Abbott <abbotti@mev.co.uk>
31 Devices: [Amplicon] PC212E (pc212e), PC214E (pc214e), PC215E (pc215e),
32 PCI215 (pci215 or amplc_dio200), PC218E (pc218e), PC272E (pc272e),
33 PCI272 (pci272 or amplc_dio200)
34 Updated: Wed, 22 Oct 2008 13:36:02 +0100
35 Status: works
36
37 Configuration options - PC212E, PC214E, PC215E, PC218E, PC272E:
38 [0] - I/O port base address
39 [1] - IRQ (optional, but commands won't work without it)
40
41 Configuration options - PCI215, PCI272:
42 [0] - PCI bus of device (optional)
43 [1] - PCI slot of device (optional)
44 If bus/slot is not specified, the first available PCI device will
45 be used.
46
47 Passing a zero for an option is the same as leaving it unspecified.
48
49 SUBDEVICES
50
51 PC218E PC212E PC215E/PCI215
52 ------------- ------------- -------------
53 Subdevices 7 6 5
54 0 CTR-X1 PPI-X PPI-X
55 1 CTR-X2 CTR-Y1 PPI-Y
56 2 CTR-Y1 CTR-Y2 CTR-Z1
57 3 CTR-Y2 CTR-Z1 CTR-Z2
58 4 CTR-Z1 CTR-Z2 INTERRUPT
59 5 CTR-Z2 INTERRUPT
60 6 INTERRUPT
61
62 PC214E PC272E/PCI272
63 ------------- -------------
64 Subdevices 4 4
65 0 PPI-X PPI-X
66 1 PPI-Y PPI-Y
67 2 CTR-Z1* PPI-Z
68 3 INTERRUPT* INTERRUPT
69
70 Each PPI is a 8255 chip providing 24 DIO channels. The DIO channels
71 are configurable as inputs or outputs in four groups:
72
73 Port A - channels 0 to 7
74 Port B - channels 8 to 15
75 Port CL - channels 16 to 19
76 Port CH - channels 20 to 23
77
78 Only mode 0 of the 8255 chips is supported.
79
80 Each CTR is a 8254 chip providing 3 16-bit counter channels. Each
81 channel is configured individually with INSN_CONFIG instructions. The
82 specific type of configuration instruction is specified in data[0].
83 Some configuration instructions expect an additional parameter in
84 data[1]; others return a value in data[1]. The following configuration
85 instructions are supported:
86
87 INSN_CONFIG_SET_COUNTER_MODE. Sets the counter channel's mode and
88 BCD/binary setting specified in data[1].
89
90 INSN_CONFIG_8254_READ_STATUS. Reads the status register value for the
91 counter channel into data[1].
92
93 INSN_CONFIG_SET_CLOCK_SRC. Sets the counter channel's clock source as
94 specified in data[1] (this is a hardware-specific value). Not
95 supported on PC214E. For the other boards, valid clock sources are
96 0 to 7 as follows:
97
98 0. CLK n, the counter channel's dedicated CLK input from the SK1
99 connector. (N.B. for other values, the counter channel's CLKn
100 pin on the SK1 connector is an output!)
101 1. Internal 10 MHz clock.
102 2. Internal 1 MHz clock.
103 3. Internal 100 kHz clock.
104 4. Internal 10 kHz clock.
105 5. Internal 1 kHz clock.
106 6. OUT n-1, the output of counter channel n-1 (see note 1 below).
107 7. Ext Clock, the counter chip's dedicated Ext Clock input from
108 the SK1 connector. This pin is shared by all three counter
109 channels on the chip.
110
111 INSN_CONFIG_GET_CLOCK_SRC. Returns the counter channel's current
112 clock source in data[1]. For internal clock sources, data[2] is set
113 to the period in ns.
114
115 INSN_CONFIG_SET_GATE_SRC. Sets the counter channel's gate source as
116 specified in data[2] (this is a hardware-specific value). Not
117 supported on PC214E. For the other boards, valid gate sources are 0
118 to 7 as follows:
119
120 0. VCC (internal +5V d.c.), i.e. gate permanently enabled.
121 1. GND (internal 0V d.c.), i.e. gate permanently disabled.
122 2. GAT n, the counter channel's dedicated GAT input from the SK1
123 connector. (N.B. for other values, the counter channel's GATn
124 pin on the SK1 connector is an output!)
125 3. /OUT n-2, the inverted output of counter channel n-2 (see note
126 2 below).
127 4. Reserved.
128 5. Reserved.
129 6. Reserved.
130 7. Reserved.
131
132 INSN_CONFIG_GET_GATE_SRC. Returns the counter channel's current gate
133 source in data[2].
134
135 Clock and gate interconnection notes:
136
137 1. Clock source OUT n-1 is the output of the preceding channel on the
138 same counter subdevice if n > 0, or the output of channel 2 on the
139 preceding counter subdevice (see note 3) if n = 0.
140
141 2. Gate source /OUT n-2 is the inverted output of channel 0 on the
142 same counter subdevice if n = 2, or the inverted output of channel n+1
143 on the preceding counter subdevice (see note 3) if n < 2.
144
145 3. The counter subdevices are connected in a ring, so the highest
146 counter subdevice precedes the lowest.
147
148 The 'INTERRUPT' subdevice pretends to be a digital input subdevice. The
149 digital inputs come from the interrupt status register. The number of
150 channels matches the number of interrupt sources. The PC214E does not
151 have an interrupt status register; see notes on 'INTERRUPT SOURCES'
152 below.
153
154 INTERRUPT SOURCES
155
156 PC218E PC212E PC215E/PCI215
157 ------------- ------------- -------------
158 Sources 6 6 6
159 0 CTR-X1-OUT PPI-X-C0 PPI-X-C0
160 1 CTR-X2-OUT PPI-X-C3 PPI-X-C3
161 2 CTR-Y1-OUT CTR-Y1-OUT PPI-Y-C0
162 3 CTR-Y2-OUT CTR-Y2-OUT PPI-Y-C3
163 4 CTR-Z1-OUT CTR-Z1-OUT CTR-Z1-OUT
164 5 CTR-Z2-OUT CTR-Z2-OUT CTR-Z2-OUT
165
166 PC214E PC272E/PCI272
167 ------------- -------------
168 Sources 1 6
169 0 JUMPER-J5 PPI-X-C0
170 1 PPI-X-C3
171 2 PPI-Y-C0
172 3 PPI-Y-C3
173 4 PPI-Z-C0
174 5 PPI-Z-C3
175
176 When an interrupt source is enabled in the interrupt source enable
177 register, a rising edge on the source signal latches the corresponding
178 bit to 1 in the interrupt status register.
179
180 When the interrupt status register value as a whole (actually, just the
181 6 least significant bits) goes from zero to non-zero, the board will
182 generate an interrupt. For level-triggered hardware interrupts (PCI
183 card), the interrupt will remain asserted until the interrupt status
184 register is cleared to zero. For edge-triggered hardware interrupts
185 (ISA card), no further interrupts will occur until the interrupt status
186 register is cleared to zero. To clear a bit to zero in the interrupt
187 status register, the corresponding interrupt source must be disabled
188 in the interrupt source enable register (there is no separate interrupt
189 clear register).
190
191 The PC214E does not have an interrupt source enable register or an
192 interrupt status register; its 'INTERRUPT' subdevice has a single
193 channel and its interrupt source is selected by the position of jumper
194 J5.
195
196 COMMANDS
197
198 The driver supports a read streaming acquisition command on the
199 'INTERRUPT' subdevice. The channel list selects the interrupt sources
200 to be enabled. All channels will be sampled together (convert_src ==
201 TRIG_NOW). The scan begins a short time after the hardware interrupt
202 occurs, subject to interrupt latencies (scan_begin_src == TRIG_EXT,
203 scan_begin_arg == 0). The value read from the interrupt status register
204 is packed into a short value, one bit per requested channel, in the
205 order they appear in the channel list.
206 */
207
208 #include <linux/interrupt.h>
209
210 #include "../comedidev.h"
211
212 #include "comedi_pci.h"
213
214 #include "8255.h"
215 #include "8253.h"
216
217 #define DIO200_DRIVER_NAME "amplc_dio200"
218
219 /* PCI IDs */
220 /* #define PCI_VENDOR_ID_AMPLICON 0x14dc */
221 #define PCI_DEVICE_ID_AMPLICON_PCI272 0x000a
222 #define PCI_DEVICE_ID_AMPLICON_PCI215 0x000b
223 #define PCI_DEVICE_ID_INVALID 0xffff
224
225 /* 200 series registers */
226 #define DIO200_IO_SIZE 0x20
227 #define DIO200_XCLK_SCE 0x18 /* Group X clock selection register */
228 #define DIO200_YCLK_SCE 0x19 /* Group Y clock selection register */
229 #define DIO200_ZCLK_SCE 0x1a /* Group Z clock selection register */
230 #define DIO200_XGAT_SCE 0x1b /* Group X gate selection register */
231 #define DIO200_YGAT_SCE 0x1c /* Group Y gate selection register */
232 #define DIO200_ZGAT_SCE 0x1d /* Group Z gate selection register */
233 #define DIO200_INT_SCE 0x1e /* Interrupt enable/status register */
234
235 /*
236 * Macros for constructing value for DIO_200_?CLK_SCE and
237 * DIO_200_?GAT_SCE registers:
238 *
239 * 'which' is: 0 for CTR-X1, CTR-Y1, CTR-Z1; 1 for CTR-X2, CTR-Y2 or CTR-Z2.
240 * 'chan' is the channel: 0, 1 or 2.
241 * 'source' is the signal source: 0 to 7.
242 */
243 #define CLK_SCE(which, chan, source) (((which) << 5) | ((chan) << 3) | (source))
244 #define GAT_SCE(which, chan, source) (((which) << 5) | ((chan) << 3) | (source))
245
246 /*
247 * Periods of the internal clock sources in nanoseconds.
248 */
249 static const unsigned clock_period[8] = {
250 0, /* dedicated clock input/output pin */
251 100, /* 10 MHz */
252 1000, /* 1 MHz */
253 10000, /* 100 kHz */
254 100000, /* 10 kHz */
255 1000000, /* 1 kHz */
256 0, /* OUT N-1 */
257 0 /* group clock input pin */
258 };
259
260 /*
261 * Board descriptions.
262 */
263
264 enum dio200_bustype { isa_bustype, pci_bustype };
265
266 enum dio200_model {
267 pc212e_model,
268 pc214e_model,
269 pc215e_model, pci215_model,
270 pc218e_model,
271 pc272e_model, pci272_model,
272 anypci_model
273 };
274
275 enum dio200_layout {
276 pc212_layout,
277 pc214_layout,
278 pc215_layout,
279 pc218_layout,
280 pc272_layout
281 };
282
283 struct dio200_board {
284 const char *name;
285 unsigned short devid;
286 enum dio200_bustype bustype;
287 enum dio200_model model;
288 enum dio200_layout layout;
289 };
290
291 static const struct dio200_board dio200_boards[] = {
292 {
293 .name = "pc212e",
294 .bustype = isa_bustype,
295 .model = pc212e_model,
296 .layout = pc212_layout,
297 },
298 {
299 .name = "pc214e",
300 .bustype = isa_bustype,
301 .model = pc214e_model,
302 .layout = pc214_layout,
303 },
304 {
305 .name = "pc215e",
306 .bustype = isa_bustype,
307 .model = pc215e_model,
308 .layout = pc215_layout,
309 },
310 #ifdef CONFIG_COMEDI_PCI
311 {
312 .name = "pci215",
313 .devid = PCI_DEVICE_ID_AMPLICON_PCI215,
314 .bustype = pci_bustype,
315 .model = pci215_model,
316 .layout = pc215_layout,
317 },
318 #endif
319 {
320 .name = "pc218e",
321 .bustype = isa_bustype,
322 .model = pc218e_model,
323 .layout = pc218_layout,
324 },
325 {
326 .name = "pc272e",
327 .bustype = isa_bustype,
328 .model = pc272e_model,
329 .layout = pc272_layout,
330 },
331 #ifdef CONFIG_COMEDI_PCI
332 {
333 .name = "pci272",
334 .devid = PCI_DEVICE_ID_AMPLICON_PCI272,
335 .bustype = pci_bustype,
336 .model = pci272_model,
337 .layout = pc272_layout,
338 },
339 #endif
340 #ifdef CONFIG_COMEDI_PCI
341 {
342 .name = DIO200_DRIVER_NAME,
343 .devid = PCI_DEVICE_ID_INVALID,
344 .bustype = pci_bustype,
345 .model = anypci_model, /* wildcard */
346 },
347 #endif
348 };
349
350 /*
351 * Layout descriptions - some ISA and PCI board descriptions share the same
352 * layout.
353 */
354
355 enum dio200_sdtype { sd_none, sd_intr, sd_8255, sd_8254 };
356
357 #define DIO200_MAX_SUBDEVS 7
358 #define DIO200_MAX_ISNS 6
359
360 struct dio200_layout_struct {
361 unsigned short n_subdevs; /* number of subdevices */
362 unsigned char sdtype[DIO200_MAX_SUBDEVS]; /* enum dio200_sdtype */
363 unsigned char sdinfo[DIO200_MAX_SUBDEVS]; /* depends on sdtype */
364 char has_int_sce; /* has interrupt enable/status register */
365 char has_clk_gat_sce; /* has clock/gate selection registers */
366 };
367
368 static const struct dio200_layout_struct dio200_layouts[] = {
369 [pc212_layout] = {
370 .n_subdevs = 6,
371 .sdtype = {sd_8255, sd_8254, sd_8254, sd_8254,
372 sd_8254,
373 sd_intr},
374 .sdinfo = {0x00, 0x08, 0x0C, 0x10, 0x14,
375 0x3F},
376 .has_int_sce = 1,
377 .has_clk_gat_sce = 1,
378 },
379 [pc214_layout] = {
380 .n_subdevs = 4,
381 .sdtype = {sd_8255, sd_8255, sd_8254,
382 sd_intr},
383 .sdinfo = {0x00, 0x08, 0x10, 0x01},
384 .has_int_sce = 0,
385 .has_clk_gat_sce = 0,
386 },
387 [pc215_layout] = {
388 .n_subdevs = 5,
389 .sdtype = {sd_8255, sd_8255, sd_8254,
390 sd_8254,
391 sd_intr},
392 .sdinfo = {0x00, 0x08, 0x10, 0x14, 0x3F},
393 .has_int_sce = 1,
394 .has_clk_gat_sce = 1,
395 },
396 [pc218_layout] = {
397 .n_subdevs = 7,
398 .sdtype = {sd_8254, sd_8254, sd_8255, sd_8254,
399 sd_8254,
400 sd_intr},
401 .sdinfo = {0x00, 0x04, 0x08, 0x0C, 0x10,
402 0x14,
403 0x3F},
404 .has_int_sce = 1,
405 .has_clk_gat_sce = 1,
406 },
407 [pc272_layout] = {
408 .n_subdevs = 4,
409 .sdtype = {sd_8255, sd_8255, sd_8255,
410 sd_intr},
411 .sdinfo = {0x00, 0x08, 0x10, 0x3F},
412 .has_int_sce = 1,
413 .has_clk_gat_sce = 0,
414 },
415 };
416
417 /*
418 * PCI driver table.
419 */
420
421 #ifdef CONFIG_COMEDI_PCI
422 static DEFINE_PCI_DEVICE_TABLE(dio200_pci_table) = {
423 {PCI_VENDOR_ID_AMPLICON, PCI_DEVICE_ID_AMPLICON_PCI215,
424 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
425 {PCI_VENDOR_ID_AMPLICON, PCI_DEVICE_ID_AMPLICON_PCI272,
426 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
427 {0}
428 };
429
430 MODULE_DEVICE_TABLE(pci, dio200_pci_table);
431 #endif /* CONFIG_COMEDI_PCI */
432
433 /*
434 * Useful for shorthand access to the particular board structure
435 */
436 #define thisboard ((const struct dio200_board *)dev->board_ptr)
437 #define thislayout (&dio200_layouts[((struct dio200_board *)dev->board_ptr)->layout])
438
439 /* this structure is for data unique to this hardware driver. If
440 several hardware drivers keep similar information in this structure,
441 feel free to suggest moving the variable to the struct comedi_device struct. */
442 struct dio200_private {
443 #ifdef CONFIG_COMEDI_PCI
444 struct pci_dev *pci_dev; /* PCI device */
445 #endif
446 int intr_sd;
447 };
448
449 #define devpriv ((struct dio200_private *)dev->private)
450
451 struct dio200_subdev_8254 {
452 unsigned long iobase; /* Counter base address */
453 unsigned long clk_sce_iobase; /* CLK_SCE base address */
454 unsigned long gat_sce_iobase; /* GAT_SCE base address */
455 int which; /* Bit 5 of CLK_SCE or GAT_SCE */
456 int has_clk_gat_sce;
457 unsigned clock_src[3]; /* Current clock sources */
458 unsigned gate_src[3]; /* Current gate sources */
459 };
460
461 struct dio200_subdev_intr {
462 unsigned long iobase;
463 spinlock_t spinlock;
464 int active;
465 int has_int_sce;
466 unsigned int valid_isns;
467 unsigned int enabled_isns;
468 unsigned int stopcount;
469 int continuous;
470 };
471
472 /*
473 * The struct comedi_driver structure tells the Comedi core module
474 * which functions to call to configure/deconfigure (attach/detach)
475 * the board, and also about the kernel module that contains
476 * the device code.
477 */
478 static int dio200_attach(struct comedi_device *dev, struct comedi_devconfig *it);
479 static int dio200_detach(struct comedi_device *dev);
480 static struct comedi_driver driver_amplc_dio200 = {
481 .driver_name = DIO200_DRIVER_NAME,
482 .module = THIS_MODULE,
483 .attach = dio200_attach,
484 .detach = dio200_detach,
485 .board_name = &dio200_boards[0].name,
486 .offset = sizeof(struct dio200_board),
487 .num_names = ARRAY_SIZE(dio200_boards),
488 };
489
490 #ifdef CONFIG_COMEDI_PCI
491 COMEDI_PCI_INITCLEANUP(driver_amplc_dio200, dio200_pci_table);
492 #else
493 COMEDI_INITCLEANUP(driver_amplc_dio200);
494 #endif
495
496 /*
497 * This function looks for a PCI device matching the requested board name,
498 * bus and slot.
499 */
500 #ifdef CONFIG_COMEDI_PCI
501 static int
502 dio200_find_pci(struct comedi_device *dev, int bus, int slot,
503 struct pci_dev **pci_dev_p)
504 {
505 struct pci_dev *pci_dev = NULL;
506
507 *pci_dev_p = NULL;
508
509 /* Look for matching PCI device. */
510 for (pci_dev = pci_get_device(PCI_VENDOR_ID_AMPLICON, PCI_ANY_ID, NULL);
511 pci_dev != NULL;
512 pci_dev = pci_get_device(PCI_VENDOR_ID_AMPLICON,
513 PCI_ANY_ID, pci_dev)) {
514 /* If bus/slot specified, check them. */
515 if (bus || slot) {
516 if (bus != pci_dev->bus->number
517 || slot != PCI_SLOT(pci_dev->devfn))
518 continue;
519 }
520 if (thisboard->model == anypci_model) {
521 /* Match any supported model. */
522 int i;
523
524 for (i = 0; i < ARRAY_SIZE(dio200_boards); i++) {
525 if (dio200_boards[i].bustype != pci_bustype)
526 continue;
527 if (pci_dev->device == dio200_boards[i].devid) {
528 /* Change board_ptr to matched board. */
529 dev->board_ptr = &dio200_boards[i];
530 break;
531 }
532 }
533 if (i == ARRAY_SIZE(dio200_boards))
534 continue;
535 } else {
536 /* Match specific model name. */
537 if (pci_dev->device != thisboard->devid)
538 continue;
539 }
540
541 /* Found a match. */
542 *pci_dev_p = pci_dev;
543 return 0;
544 }
545 /* No match found. */
546 if (bus || slot) {
547 printk(KERN_ERR
548 "comedi%d: error! no %s found at pci %02x:%02x!\n",
549 dev->minor, thisboard->name, bus, slot);
550 } else {
551 printk(KERN_ERR "comedi%d: error! no %s found!\n",
552 dev->minor, thisboard->name);
553 }
554 return -EIO;
555 }
556 #endif
557
558 /*
559 * This function checks and requests an I/O region, reporting an error
560 * if there is a conflict.
561 */
562 static int
563 dio200_request_region(unsigned minor, unsigned long from, unsigned long extent)
564 {
565 if (!from || !request_region(from, extent, DIO200_DRIVER_NAME)) {
566 printk(KERN_ERR "comedi%d: I/O port conflict (%#lx,%lu)!\n",
567 minor, from, extent);
568 return -EIO;
569 }
570 return 0;
571 }
572
573 /*
574 * 'insn_bits' function for an 'INTERRUPT' subdevice.
575 */
576 static int
577 dio200_subdev_intr_insn_bits(struct comedi_device *dev, struct comedi_subdevice *s,
578 struct comedi_insn *insn, unsigned int *data)
579 {
580 struct dio200_subdev_intr *subpriv = s->private;
581
582 if (subpriv->has_int_sce) {
583 /* Just read the interrupt status register. */
584 data[1] = inb(subpriv->iobase) & subpriv->valid_isns;
585 } else {
586 /* No interrupt status register. */
587 data[0] = 0;
588 }
589
590 return 2;
591 }
592
593 /*
594 * Called to stop acquisition for an 'INTERRUPT' subdevice.
595 */
596 static void dio200_stop_intr(struct comedi_device *dev, struct comedi_subdevice *s)
597 {
598 struct dio200_subdev_intr *subpriv = s->private;
599
600 subpriv->active = 0;
601 subpriv->enabled_isns = 0;
602 if (subpriv->has_int_sce) {
603 outb(0, subpriv->iobase);
604 }
605 }
606
607 /*
608 * Called to start acquisition for an 'INTERRUPT' subdevice.
609 */
610 static int dio200_start_intr(struct comedi_device *dev, struct comedi_subdevice *s)
611 {
612 unsigned int n;
613 unsigned isn_bits;
614 struct dio200_subdev_intr *subpriv = s->private;
615 struct comedi_cmd *cmd = &s->async->cmd;
616 int retval = 0;
617
618 if (!subpriv->continuous && subpriv->stopcount == 0) {
619 /* An empty acquisition! */
620 s->async->events |= COMEDI_CB_EOA;
621 subpriv->active = 0;
622 retval = 1;
623 } else {
624 /* Determine interrupt sources to enable. */
625 isn_bits = 0;
626 if (cmd->chanlist) {
627 for (n = 0; n < cmd->chanlist_len; n++) {
628 isn_bits |= (1U << CR_CHAN(cmd->chanlist[n]));
629 }
630 }
631 isn_bits &= subpriv->valid_isns;
632 /* Enable interrupt sources. */
633 subpriv->enabled_isns = isn_bits;
634 if (subpriv->has_int_sce) {
635 outb(isn_bits, subpriv->iobase);
636 }
637 }
638
639 return retval;
640 }
641
642 /*
643 * Internal trigger function to start acquisition for an 'INTERRUPT' subdevice.
644 */
645 static int
646 dio200_inttrig_start_intr(struct comedi_device *dev, struct comedi_subdevice *s,
647 unsigned int trignum)
648 {
649 struct dio200_subdev_intr *subpriv;
650 unsigned long flags;
651 int event = 0;
652
653 if (trignum != 0)
654 return -EINVAL;
655
656 subpriv = s->private;
657
658 spin_lock_irqsave(&subpriv->spinlock, flags);
659 s->async->inttrig = 0;
660 if (subpriv->active) {
661 event = dio200_start_intr(dev, s);
662 }
663 spin_unlock_irqrestore(&subpriv->spinlock, flags);
664
665 if (event) {
666 comedi_event(dev, s);
667 }
668
669 return 1;
670 }
671
672 /*
673 * This is called from the interrupt service routine to handle a read
674 * scan on an 'INTERRUPT' subdevice.
675 */
676 static int dio200_handle_read_intr(struct comedi_device *dev, struct comedi_subdevice *s)
677 {
678 struct dio200_subdev_intr *subpriv = s->private;
679 unsigned triggered;
680 unsigned intstat;
681 unsigned cur_enabled;
682 unsigned int oldevents;
683 unsigned long flags;
684
685 triggered = 0;
686
687 spin_lock_irqsave(&subpriv->spinlock, flags);
688 oldevents = s->async->events;
689 if (subpriv->has_int_sce) {
690 /*
691 * Collect interrupt sources that have triggered and disable
692 * them temporarily. Loop around until no extra interrupt
693 * sources have triggered, at which point, the valid part of
694 * the interrupt status register will read zero, clearing the
695 * cause of the interrupt.
696 *
697 * Mask off interrupt sources already seen to avoid infinite
698 * loop in case of misconfiguration.
699 */
700 cur_enabled = subpriv->enabled_isns;
701 while ((intstat = (inb(subpriv->iobase) & subpriv->valid_isns
702 & ~triggered)) != 0) {
703 triggered |= intstat;
704 cur_enabled &= ~triggered;
705 outb(cur_enabled, subpriv->iobase);
706 }
707 } else {
708 /*
709 * No interrupt status register. Assume the single interrupt
710 * source has triggered.
711 */
712 triggered = subpriv->enabled_isns;
713 }
714
715 if (triggered) {
716 /*
717 * Some interrupt sources have triggered and have been
718 * temporarily disabled to clear the cause of the interrupt.
719 *
720 * Reenable them NOW to minimize the time they are disabled.
721 */
722 cur_enabled = subpriv->enabled_isns;
723 if (subpriv->has_int_sce) {
724 outb(cur_enabled, subpriv->iobase);
725 }
726
727 if (subpriv->active) {
728 /*
729 * The command is still active.
730 *
731 * Ignore interrupt sources that the command isn't
732 * interested in (just in case there's a race
733 * condition).
734 */
735 if (triggered & subpriv->enabled_isns) {
736 /* Collect scan data. */
737 short val;
738 unsigned int n, ch, len;
739
740 val = 0;
741 len = s->async->cmd.chanlist_len;
742 for (n = 0; n < len; n++) {
743 ch = CR_CHAN(s->async->cmd.chanlist[n]);
744 if (triggered & (1U << ch)) {
745 val |= (1U << n);
746 }
747 }
748 /* Write the scan to the buffer. */
749 if (comedi_buf_put(s->async, val)) {
750 s->async->events |= (COMEDI_CB_BLOCK |
751 COMEDI_CB_EOS);
752 } else {
753 /* Error! Stop acquisition. */
754 dio200_stop_intr(dev, s);
755 s->async->events |= COMEDI_CB_ERROR
756 | COMEDI_CB_OVERFLOW;
757 comedi_error(dev, "buffer overflow");
758 }
759
760 /* Check for end of acquisition. */
761 if (!subpriv->continuous) {
762 /* stop_src == TRIG_COUNT */
763 if (subpriv->stopcount > 0) {
764 subpriv->stopcount--;
765 if (subpriv->stopcount == 0) {
766 s->async->events |=
767 COMEDI_CB_EOA;
768 dio200_stop_intr(dev,
769 s);
770 }
771 }
772 }
773 }
774 }
775 }
776 spin_unlock_irqrestore(&subpriv->spinlock, flags);
777
778 if (oldevents != s->async->events) {
779 comedi_event(dev, s);
780 }
781
782 return (triggered != 0);
783 }
784
785 /*
786 * 'cancel' function for an 'INTERRUPT' subdevice.
787 */
788 static int dio200_subdev_intr_cancel(struct comedi_device *dev, struct comedi_subdevice *s)
789 {
790 struct dio200_subdev_intr *subpriv = s->private;
791 unsigned long flags;
792
793 spin_lock_irqsave(&subpriv->spinlock, flags);
794 if (subpriv->active) {
795 dio200_stop_intr(dev, s);
796 }
797 spin_unlock_irqrestore(&subpriv->spinlock, flags);
798
799 return 0;
800 }
801
802 /*
803 * 'do_cmdtest' function for an 'INTERRUPT' subdevice.
804 */
805 static int
806 dio200_subdev_intr_cmdtest(struct comedi_device *dev, struct comedi_subdevice *s,
807 struct comedi_cmd *cmd)
808 {
809 int err = 0;
810 unsigned int tmp;
811
812 /* step 1: make sure trigger sources are trivially valid */
813
814 tmp = cmd->start_src;
815 cmd->start_src &= (TRIG_NOW | TRIG_INT);
816 if (!cmd->start_src || tmp != cmd->start_src)
817 err++;
818
819 tmp = cmd->scan_begin_src;
820 cmd->scan_begin_src &= TRIG_EXT;
821 if (!cmd->scan_begin_src || tmp != cmd->scan_begin_src)
822 err++;
823
824 tmp = cmd->convert_src;
825 cmd->convert_src &= TRIG_NOW;
826 if (!cmd->convert_src || tmp != cmd->convert_src)
827 err++;
828
829 tmp = cmd->scan_end_src;
830 cmd->scan_end_src &= TRIG_COUNT;
831 if (!cmd->scan_end_src || tmp != cmd->scan_end_src)
832 err++;
833
834 tmp = cmd->stop_src;
835 cmd->stop_src &= (TRIG_COUNT | TRIG_NONE);
836 if (!cmd->stop_src || tmp != cmd->stop_src)
837 err++;
838
839 if (err)
840 return 1;
841
842 /* step 2: make sure trigger sources are unique and mutually compatible */
843
844 /* these tests are true if more than one _src bit is set */
845 if ((cmd->start_src & (cmd->start_src - 1)) != 0)
846 err++;
847 if ((cmd->scan_begin_src & (cmd->scan_begin_src - 1)) != 0)
848 err++;
849 if ((cmd->convert_src & (cmd->convert_src - 1)) != 0)
850 err++;
851 if ((cmd->scan_end_src & (cmd->scan_end_src - 1)) != 0)
852 err++;
853 if ((cmd->stop_src & (cmd->stop_src - 1)) != 0)
854 err++;
855
856 if (err)
857 return 2;
858
859 /* step 3: make sure arguments are trivially compatible */
860
861 /* cmd->start_src == TRIG_NOW || cmd->start_src == TRIG_INT */
862 if (cmd->start_arg != 0) {
863 cmd->start_arg = 0;
864 err++;
865 }
866
867 /* cmd->scan_begin_src == TRIG_EXT */
868 if (cmd->scan_begin_arg != 0) {
869 cmd->scan_begin_arg = 0;
870 err++;
871 }
872
873 /* cmd->convert_src == TRIG_NOW */
874 if (cmd->convert_arg != 0) {
875 cmd->convert_arg = 0;
876 err++;
877 }
878
879 /* cmd->scan_end_src == TRIG_COUNT */
880 if (cmd->scan_end_arg != cmd->chanlist_len) {
881 cmd->scan_end_arg = cmd->chanlist_len;
882 err++;
883 }
884
885 switch (cmd->stop_src) {
886 case TRIG_COUNT:
887 /* any count allowed */
888 break;
889 case TRIG_NONE:
890 if (cmd->stop_arg != 0) {
891 cmd->stop_arg = 0;
892 err++;
893 }
894 break;
895 default:
896 break;
897 }
898
899 if (err)
900 return 3;
901
902 /* step 4: fix up any arguments */
903
904 /* if (err) return 4; */
905
906 return 0;
907 }
908
909 /*
910 * 'do_cmd' function for an 'INTERRUPT' subdevice.
911 */
912 static int dio200_subdev_intr_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
913 {
914 struct comedi_cmd *cmd = &s->async->cmd;
915 struct dio200_subdev_intr *subpriv = s->private;
916 unsigned long flags;
917 int event = 0;
918
919 spin_lock_irqsave(&subpriv->spinlock, flags);
920 subpriv->active = 1;
921
922 /* Set up end of acquisition. */
923 switch (cmd->stop_src) {
924 case TRIG_COUNT:
925 subpriv->continuous = 0;
926 subpriv->stopcount = cmd->stop_arg;
927 break;
928 default:
929 /* TRIG_NONE */
930 subpriv->continuous = 1;
931 subpriv->stopcount = 0;
932 break;
933 }
934
935 /* Set up start of acquisition. */
936 switch (cmd->start_src) {
937 case TRIG_INT:
938 s->async->inttrig = dio200_inttrig_start_intr;
939 break;
940 default:
941 /* TRIG_NOW */
942 event = dio200_start_intr(dev, s);
943 break;
944 }
945 spin_unlock_irqrestore(&subpriv->spinlock, flags);
946
947 if (event) {
948 comedi_event(dev, s);
949 }
950
951 return 0;
952 }
953
954 /*
955 * This function initializes an 'INTERRUPT' subdevice.
956 */
957 static int
958 dio200_subdev_intr_init(struct comedi_device *dev, struct comedi_subdevice *s,
959 unsigned long iobase, unsigned valid_isns, int has_int_sce)
960 {
961 struct dio200_subdev_intr *subpriv;
962
963 subpriv = kzalloc(sizeof(*subpriv), GFP_KERNEL);
964 if (!subpriv) {
965 printk(KERN_ERR "comedi%d: error! out of memory!\n",
966 dev->minor);
967 return -ENOMEM;
968 }
969 subpriv->iobase = iobase;
970 subpriv->has_int_sce = has_int_sce;
971 subpriv->valid_isns = valid_isns;
972 spin_lock_init(&subpriv->spinlock);
973
974 if (has_int_sce) {
975 outb(0, subpriv->iobase); /* Disable interrupt sources. */
976 }
977
978 s->private = subpriv;
979 s->type = COMEDI_SUBD_DI;
980 s->subdev_flags = SDF_READABLE | SDF_CMD_READ;
981 if (has_int_sce) {
982 s->n_chan = DIO200_MAX_ISNS;
983 s->len_chanlist = DIO200_MAX_ISNS;
984 } else {
985 /* No interrupt source register. Support single channel. */
986 s->n_chan = 1;
987 s->len_chanlist = 1;
988 }
989 s->range_table = &range_digital;
990 s->maxdata = 1;
991 s->insn_bits = dio200_subdev_intr_insn_bits;
992 s->do_cmdtest = dio200_subdev_intr_cmdtest;
993 s->do_cmd = dio200_subdev_intr_cmd;
994 s->cancel = dio200_subdev_intr_cancel;
995
996 return 0;
997 }
998
999 /*
1000 * This function cleans up an 'INTERRUPT' subdevice.
1001 */
1002 static void
1003 dio200_subdev_intr_cleanup(struct comedi_device *dev, struct comedi_subdevice *s)
1004 {
1005 struct dio200_subdev_intr *subpriv = s->private;
1006
1007 if (subpriv) {
1008 kfree(subpriv);
1009 }
1010 }
1011
1012 /*
1013 * Interrupt service routine.
1014 */
1015 static irqreturn_t dio200_interrupt(int irq, void *d)
1016 {
1017 struct comedi_device *dev = d;
1018 int handled;
1019
1020 if (!dev->attached) {
1021 return IRQ_NONE;
1022 }
1023
1024 if (devpriv->intr_sd >= 0) {
1025 handled = dio200_handle_read_intr(dev,
1026 dev->subdevices + devpriv->intr_sd);
1027 } else {
1028 handled = 0;
1029 }
1030
1031 return IRQ_RETVAL(handled);
1032 }
1033
1034 /*
1035 * Handle 'insn_read' for an '8254' counter subdevice.
1036 */
1037 static int
1038 dio200_subdev_8254_read(struct comedi_device *dev, struct comedi_subdevice *s,
1039 struct comedi_insn *insn, unsigned int *data)
1040 {
1041 struct dio200_subdev_8254 *subpriv = s->private;
1042 int chan = CR_CHAN(insn->chanspec);
1043
1044 data[0] = i8254_read(subpriv->iobase, 0, chan);
1045
1046 return 1;
1047 }
1048
1049 /*
1050 * Handle 'insn_write' for an '8254' counter subdevice.
1051 */
1052 static int
1053 dio200_subdev_8254_write(struct comedi_device *dev, struct comedi_subdevice *s,
1054 struct comedi_insn *insn, unsigned int *data)
1055 {
1056 struct dio200_subdev_8254 *subpriv = s->private;
1057 int chan = CR_CHAN(insn->chanspec);
1058
1059 i8254_write(subpriv->iobase, 0, chan, data[0]);
1060
1061 return 1;
1062 }
1063
1064 /*
1065 * Set gate source for an '8254' counter subdevice channel.
1066 */
1067 static int
1068 dio200_set_gate_src(struct dio200_subdev_8254 *subpriv, unsigned int counter_number,
1069 unsigned int gate_src)
1070 {
1071 unsigned char byte;
1072
1073 if (!subpriv->has_clk_gat_sce)
1074 return -1;
1075 if (counter_number > 2)
1076 return -1;
1077 if (gate_src > 7)
1078 return -1;
1079
1080 subpriv->gate_src[counter_number] = gate_src;
1081 byte = GAT_SCE(subpriv->which, counter_number, gate_src);
1082 outb(byte, subpriv->gat_sce_iobase);
1083
1084 return 0;
1085 }
1086
1087 /*
1088 * Get gate source for an '8254' counter subdevice channel.
1089 */
1090 static int
1091 dio200_get_gate_src(struct dio200_subdev_8254 *subpriv, unsigned int counter_number)
1092 {
1093 if (!subpriv->has_clk_gat_sce)
1094 return -1;
1095 if (counter_number > 2)
1096 return -1;
1097
1098 return subpriv->gate_src[counter_number];
1099 }
1100
1101 /*
1102 * Set clock source for an '8254' counter subdevice channel.
1103 */
1104 static int
1105 dio200_set_clock_src(struct dio200_subdev_8254 *subpriv, unsigned int counter_number,
1106 unsigned int clock_src)
1107 {
1108 unsigned char byte;
1109
1110 if (!subpriv->has_clk_gat_sce)
1111 return -1;
1112 if (counter_number > 2)
1113 return -1;
1114 if (clock_src > 7)
1115 return -1;
1116
1117 subpriv->clock_src[counter_number] = clock_src;
1118 byte = CLK_SCE(subpriv->which, counter_number, clock_src);
1119 outb(byte, subpriv->clk_sce_iobase);
1120
1121 return 0;
1122 }
1123
1124 /*
1125 * Get clock source for an '8254' counter subdevice channel.
1126 */
1127 static int
1128 dio200_get_clock_src(struct dio200_subdev_8254 *subpriv, unsigned int counter_number,
1129 unsigned int *period_ns)
1130 {
1131 unsigned clock_src;
1132
1133 if (!subpriv->has_clk_gat_sce)
1134 return -1;
1135 if (counter_number > 2)
1136 return -1;
1137
1138 clock_src = subpriv->clock_src[counter_number];
1139 *period_ns = clock_period[clock_src];
1140 return clock_src;
1141 }
1142
1143 /*
1144 * Handle 'insn_config' for an '8254' counter subdevice.
1145 */
1146 static int
1147 dio200_subdev_8254_config(struct comedi_device *dev, struct comedi_subdevice *s,
1148 struct comedi_insn *insn, unsigned int *data)
1149 {
1150 struct dio200_subdev_8254 *subpriv = s->private;
1151 int ret;
1152 int chan = CR_CHAN(insn->chanspec);
1153
1154 switch (data[0]) {
1155 case INSN_CONFIG_SET_COUNTER_MODE:
1156 ret = i8254_set_mode(subpriv->iobase, 0, chan, data[1]);
1157 if (ret < 0)
1158 return -EINVAL;
1159 break;
1160 case INSN_CONFIG_8254_READ_STATUS:
1161 data[1] = i8254_status(subpriv->iobase, 0, chan);
1162 break;
1163 case INSN_CONFIG_SET_GATE_SRC:
1164 ret = dio200_set_gate_src(subpriv, chan, data[2]);
1165 if (ret < 0)
1166 return -EINVAL;
1167 break;
1168 case INSN_CONFIG_GET_GATE_SRC:
1169 ret = dio200_get_gate_src(subpriv, chan);
1170 if (ret < 0)
1171 return -EINVAL;
1172 data[2] = ret;
1173 break;
1174 case INSN_CONFIG_SET_CLOCK_SRC:
1175 ret = dio200_set_clock_src(subpriv, chan, data[1]);
1176 if (ret < 0)
1177 return -EINVAL;
1178 break;
1179 case INSN_CONFIG_GET_CLOCK_SRC:
1180 ret = dio200_get_clock_src(subpriv, chan, &data[2]);
1181 if (ret < 0)
1182 return -EINVAL;
1183 data[1] = ret;
1184 break;
1185 default:
1186 return -EINVAL;
1187 break;
1188 }
1189 return insn->n;
1190 }
1191
1192 /*
1193 * This function initializes an '8254' counter subdevice.
1194 *
1195 * Note: iobase is the base address of the board, not the subdevice;
1196 * offset is the offset to the 8254 chip.
1197 */
1198 static int
1199 dio200_subdev_8254_init(struct comedi_device *dev, struct comedi_subdevice *s,
1200 unsigned long iobase, unsigned offset, int has_clk_gat_sce)
1201 {
1202 struct dio200_subdev_8254 *subpriv;
1203 unsigned int chan;
1204
1205 subpriv = kzalloc(sizeof(*subpriv), GFP_KERNEL);
1206 if (!subpriv) {
1207 printk(KERN_ERR "comedi%d: error! out of memory!\n",
1208 dev->minor);
1209 return -ENOMEM;
1210 }
1211
1212 s->private = subpriv;
1213 s->type = COMEDI_SUBD_COUNTER;
1214 s->subdev_flags = SDF_WRITABLE | SDF_READABLE;
1215 s->n_chan = 3;
1216 s->maxdata = 0xFFFF;
1217 s->insn_read = dio200_subdev_8254_read;
1218 s->insn_write = dio200_subdev_8254_write;
1219 s->insn_config = dio200_subdev_8254_config;
1220
1221 subpriv->iobase = offset + iobase;
1222 subpriv->has_clk_gat_sce = has_clk_gat_sce;
1223 if (has_clk_gat_sce) {
1224 /* Derive CLK_SCE and GAT_SCE register offsets from
1225 * 8254 offset. */
1226 subpriv->clk_sce_iobase =
1227 DIO200_XCLK_SCE + (offset >> 3) + iobase;
1228 subpriv->gat_sce_iobase =
1229 DIO200_XGAT_SCE + (offset >> 3) + iobase;
1230 subpriv->which = (offset >> 2) & 1;
1231 }
1232
1233 /* Initialize channels. */
1234 for (chan = 0; chan < 3; chan++) {
1235 i8254_set_mode(subpriv->iobase, 0, chan,
1236 I8254_MODE0 | I8254_BINARY);
1237 if (subpriv->has_clk_gat_sce) {
1238 /* Gate source 0 is VCC (logic 1). */
1239 dio200_set_gate_src(subpriv, chan, 0);
1240 /* Clock source 0 is the dedicated clock input. */
1241 dio200_set_clock_src(subpriv, chan, 0);
1242 }
1243 }
1244
1245 return 0;
1246 }
1247
1248 /*
1249 * This function cleans up an '8254' counter subdevice.
1250 */
1251 static void
1252 dio200_subdev_8254_cleanup(struct comedi_device *dev, struct comedi_subdevice *s)
1253 {
1254 struct dio200_subdev_intr *subpriv = s->private;
1255
1256 if (subpriv) {
1257 kfree(subpriv);
1258 }
1259 }
1260
1261 /*
1262 * Attach is called by the Comedi core to configure the driver
1263 * for a particular board. If you specified a board_name array
1264 * in the driver structure, dev->board_ptr contains that
1265 * address.
1266 */
1267 static int dio200_attach(struct comedi_device *dev, struct comedi_devconfig *it)
1268 {
1269 struct comedi_subdevice *s;
1270 unsigned long iobase = 0;
1271 unsigned int irq = 0;
1272 #ifdef CONFIG_COMEDI_PCI
1273 struct pci_dev *pci_dev = NULL;
1274 int bus = 0, slot = 0;
1275 #endif
1276 const struct dio200_layout_struct *layout;
1277 int share_irq = 0;
1278 int sdx;
1279 unsigned n;
1280 int ret;
1281
1282 printk(KERN_DEBUG "comedi%d: %s: attach\n", dev->minor,
1283 DIO200_DRIVER_NAME);
1284
1285 ret = alloc_private(dev, sizeof(struct dio200_private));
1286 if (ret < 0) {
1287 printk(KERN_ERR "comedi%d: error! out of memory!\n",
1288 dev->minor);
1289 return ret;
1290 }
1291
1292 /* Process options. */
1293 switch (thisboard->bustype) {
1294 case isa_bustype:
1295 iobase = it->options[0];
1296 irq = it->options[1];
1297 share_irq = 0;
1298 break;
1299 #ifdef CONFIG_COMEDI_PCI
1300 case pci_bustype:
1301 bus = it->options[0];
1302 slot = it->options[1];
1303 share_irq = 1;
1304
1305 ret = dio200_find_pci(dev, bus, slot, &pci_dev);
1306 if (ret < 0)
1307 return ret;
1308 devpriv->pci_dev = pci_dev;
1309 break;
1310 #endif
1311 default:
1312 printk(KERN_ERR
1313 "comedi%d: %s: BUG! cannot determine board type!\n",
1314 dev->minor, DIO200_DRIVER_NAME);
1315 return -EINVAL;
1316 break;
1317 }
1318
1319 devpriv->intr_sd = -1;
1320
1321 /* Enable device and reserve I/O spaces. */
1322 #ifdef CONFIG_COMEDI_PCI
1323 if (pci_dev) {
1324 ret = comedi_pci_enable(pci_dev, DIO200_DRIVER_NAME);
1325 if (ret < 0) {
1326 printk(KERN_ERR
1327 "comedi%d: error! cannot enable PCI device and request regions!\n",
1328 dev->minor);
1329 return ret;
1330 }
1331 iobase = pci_resource_start(pci_dev, 2);
1332 irq = pci_dev->irq;
1333 } else
1334 #endif
1335 {
1336 ret = dio200_request_region(dev->minor, iobase, DIO200_IO_SIZE);
1337 if (ret < 0) {
1338 return ret;
1339 }
1340 }
1341 dev->iobase = iobase;
1342
1343 layout = thislayout;
1344
1345 ret = alloc_subdevices(dev, layout->n_subdevs);
1346 if (ret < 0) {
1347 printk(KERN_ERR "comedi%d: error! out of memory!\n",
1348 dev->minor);
1349 return ret;
1350 }
1351
1352 for (n = 0; n < dev->n_subdevices; n++) {
1353 s = &dev->subdevices[n];
1354 switch (layout->sdtype[n]) {
1355 case sd_8254:
1356 /* counter subdevice (8254) */
1357 ret = dio200_subdev_8254_init(dev, s, iobase,
1358 layout->sdinfo[n], layout->has_clk_gat_sce);
1359 if (ret < 0) {
1360 return ret;
1361 }
1362 break;
1363 case sd_8255:
1364 /* digital i/o subdevice (8255) */
1365 ret = subdev_8255_init(dev, s, 0,
1366 iobase + layout->sdinfo[n]);
1367 if (ret < 0) {
1368 return ret;
1369 }
1370 break;
1371 case sd_intr:
1372 /* 'INTERRUPT' subdevice */
1373 if (irq) {
1374 ret = dio200_subdev_intr_init(dev, s,
1375 iobase + DIO200_INT_SCE,
1376 layout->sdinfo[n], layout->has_int_sce);
1377 if (ret < 0) {
1378 return ret;
1379 }
1380 devpriv->intr_sd = n;
1381 } else {
1382 s->type = COMEDI_SUBD_UNUSED;
1383 }
1384 break;
1385 default:
1386 s->type = COMEDI_SUBD_UNUSED;
1387 break;
1388 }
1389 }
1390
1391 sdx = devpriv->intr_sd;
1392 if (sdx >= 0 && sdx < dev->n_subdevices) {
1393 dev->read_subdev = &dev->subdevices[sdx];
1394 }
1395
1396 dev->board_name = thisboard->name;
1397
1398 if (irq) {
1399 unsigned long flags = share_irq ? IRQF_SHARED : 0;
1400
1401 if (request_irq(irq, dio200_interrupt, flags,
1402 DIO200_DRIVER_NAME, dev) >= 0) {
1403 dev->irq = irq;
1404 } else {
1405 printk(KERN_WARNING
1406 "comedi%d: warning! irq %u unavailable!\n",
1407 dev->minor, irq);
1408 }
1409 }
1410
1411 printk(KERN_INFO "comedi%d: %s ", dev->minor, dev->board_name);
1412 if (thisboard->bustype == isa_bustype) {
1413 printk("(base %#lx) ", iobase);
1414 } else {
1415 #ifdef CONFIG_COMEDI_PCI
1416 printk("(pci %s) ", pci_name(pci_dev));
1417 #endif
1418 }
1419 if (irq) {
1420 printk("(irq %u%s) ", irq, (dev->irq ? "" : " UNAVAILABLE"));
1421 } else {
1422 printk("(no irq) ");
1423 }
1424
1425 printk("attached\n");
1426
1427 return 1;
1428 }
1429
1430 /*
1431 * _detach is called to deconfigure a device. It should deallocate
1432 * resources.
1433 * This function is also called when _attach() fails, so it should be
1434 * careful not to release resources that were not necessarily
1435 * allocated by _attach(). dev->private and dev->subdevices are
1436 * deallocated automatically by the core.
1437 */
1438 static int dio200_detach(struct comedi_device *dev)
1439 {
1440 const struct dio200_layout_struct *layout;
1441 unsigned n;
1442
1443 printk(KERN_DEBUG "comedi%d: %s: detach\n", dev->minor,
1444 DIO200_DRIVER_NAME);
1445
1446 if (dev->irq) {
1447 free_irq(dev->irq, dev);
1448 }
1449 if (dev->subdevices) {
1450 layout = thislayout;
1451 for (n = 0; n < dev->n_subdevices; n++) {
1452 struct comedi_subdevice *s = &dev->subdevices[n];
1453 switch (layout->sdtype[n]) {
1454 case sd_8254:
1455 dio200_subdev_8254_cleanup(dev, s);
1456 break;
1457 case sd_8255:
1458 subdev_8255_cleanup(dev, s);
1459 break;
1460 case sd_intr:
1461 dio200_subdev_intr_cleanup(dev, s);
1462 break;
1463 default:
1464 break;
1465 }
1466 }
1467 }
1468 if (devpriv) {
1469 #ifdef CONFIG_COMEDI_PCI
1470 if (devpriv->pci_dev) {
1471 if (dev->iobase) {
1472 comedi_pci_disable(devpriv->pci_dev);
1473 }
1474 pci_dev_put(devpriv->pci_dev);
1475 } else
1476 #endif
1477 {
1478 if (dev->iobase) {
1479 release_region(dev->iobase, DIO200_IO_SIZE);
1480 }
1481 }
1482 }
1483 if (dev->board_name) {
1484 printk(KERN_INFO "comedi%d: %s removed\n",
1485 dev->minor, dev->board_name);
1486 }
1487
1488 return 0;
1489 }
1490
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