/drivers/staging/comedi/drivers/amplc_dio200.c
C | 1556 lines | 994 code | 163 blank | 399 comment | 161 complexity | f168ab3375ca4c7d0d393c1c2009aa0a MD5 | raw file
Possible License(s): GPL-2.0, LGPL-2.0, AGPL-1.0
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/*
28Driver: amplc_dio200
29Description: Amplicon 200 Series Digital I/O
30Author: Ian Abbott <abbotti@mev.co.uk>
31Devices: [Amplicon] PC212E (pc212e), PC214E (pc214e), PC215E (pc215e),
32 PCI215 (pci215 or amplc_dio200), PC218E (pc218e), PC272E (pc272e),
33 PCI272 (pci272 or amplc_dio200)
34Updated: Wed, 22 Oct 2008 13:36:02 +0100
35Status: works
36
37Configuration 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
41Configuration 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
47Passing a zero for an option is the same as leaving it unspecified.
48
49SUBDEVICES
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
70Each PPI is a 8255 chip providing 24 DIO channels. The DIO channels
71are 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
78Only mode 0 of the 8255 chips is supported.
79
80Each CTR is a 8254 chip providing 3 16-bit counter channels. Each
81channel is configured individually with INSN_CONFIG instructions. The
82specific type of configuration instruction is specified in data[0].
83Some configuration instructions expect an additional parameter in
84data[1]; others return a value in data[1]. The following configuration
85instructions 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
135Clock 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
148The 'INTERRUPT' subdevice pretends to be a digital input subdevice. The
149digital inputs come from the interrupt status register. The number of
150channels matches the number of interrupt sources. The PC214E does not
151have an interrupt status register; see notes on 'INTERRUPT SOURCES'
152below.
153
154INTERRUPT 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
176When an interrupt source is enabled in the interrupt source enable
177register, a rising edge on the source signal latches the corresponding
178bit to 1 in the interrupt status register.
179
180When the interrupt status register value as a whole (actually, just the
1816 least significant bits) goes from zero to non-zero, the board will
182generate an interrupt. For level-triggered hardware interrupts (PCI
183card), the interrupt will remain asserted until the interrupt status
184register is cleared to zero. For edge-triggered hardware interrupts
185(ISA card), no further interrupts will occur until the interrupt status
186register is cleared to zero. To clear a bit to zero in the interrupt
187status register, the corresponding interrupt source must be disabled
188in the interrupt source enable register (there is no separate interrupt
189clear register).
190
191The PC214E does not have an interrupt source enable register or an
192interrupt status register; its 'INTERRUPT' subdevice has a single
193channel and its interrupt source is selected by the position of jumper
194J5.
195
196COMMANDS
197
198The driver supports a read streaming acquisition command on the
199'INTERRUPT' subdevice. The channel list selects the interrupt sources
200to be enabled. All channels will be sampled together (convert_src ==
201TRIG_NOW). The scan begins a short time after the hardware interrupt
202occurs, subject to interrupt latencies (scan_begin_src == TRIG_EXT,
203scan_begin_arg == 0). The value read from the interrupt status register
204is packed into a short value, one bit per requested channel, in the
205order they appear in the channel list.
206*/
207
208#include <linux/interrupt.h>
209#include <linux/slab.h>
210
211#include "../comedidev.h"
212
213#include "comedi_pci.h"
214
215#include "8255.h"
216#include "8253.h"
217
218#define DIO200_DRIVER_NAME "amplc_dio200"
219
220/* PCI IDs */
221#define PCI_VENDOR_ID_AMPLICON 0x14dc
222#define PCI_DEVICE_ID_AMPLICON_PCI272 0x000a
223#define PCI_DEVICE_ID_AMPLICON_PCI215 0x000b
224#define PCI_DEVICE_ID_INVALID 0xffff
225
226/* 200 series registers */
227#define DIO200_IO_SIZE 0x20
228#define DIO200_XCLK_SCE 0x18 /* Group X clock selection register */
229#define DIO200_YCLK_SCE 0x19 /* Group Y clock selection register */
230#define DIO200_ZCLK_SCE 0x1a /* Group Z clock selection register */
231#define DIO200_XGAT_SCE 0x1b /* Group X gate selection register */
232#define DIO200_YGAT_SCE 0x1c /* Group Y gate selection register */
233#define DIO200_ZGAT_SCE 0x1d /* Group Z gate selection register */
234#define DIO200_INT_SCE 0x1e /* Interrupt enable/status register */
235
236/*
237 * Macros for constructing value for DIO_200_?CLK_SCE and
238 * DIO_200_?GAT_SCE registers:
239 *
240 * 'which' is: 0 for CTR-X1, CTR-Y1, CTR-Z1; 1 for CTR-X2, CTR-Y2 or CTR-Z2.
241 * 'chan' is the channel: 0, 1 or 2.
242 * 'source' is the signal source: 0 to 7.
243 */
244#define CLK_SCE(which, chan, source) (((which) << 5) | ((chan) << 3) | (source))
245#define GAT_SCE(which, chan, source) (((which) << 5) | ((chan) << 3) | (source))
246
247/*
248 * Periods of the internal clock sources in nanoseconds.
249 */
250static const unsigned clock_period[8] = {
251 0, /* dedicated clock input/output pin */
252 100, /* 10 MHz */
253 1000, /* 1 MHz */
254 10000, /* 100 kHz */
255 100000, /* 10 kHz */
256 1000000, /* 1 kHz */
257 0, /* OUT N-1 */
258 0 /* group clock input pin */
259};
260
261/*
262 * Board descriptions.
263 */
264
265enum dio200_bustype { isa_bustype, pci_bustype };
266
267enum dio200_model {
268 pc212e_model,
269 pc214e_model,
270 pc215e_model, pci215_model,
271 pc218e_model,
272 pc272e_model, pci272_model,
273 anypci_model
274};
275
276enum dio200_layout {
277 pc212_layout,
278 pc214_layout,
279 pc215_layout,
280 pc218_layout,
281 pc272_layout
282};
283
284struct dio200_board {
285 const char *name;
286 unsigned short devid;
287 enum dio200_bustype bustype;
288 enum dio200_model model;
289 enum dio200_layout layout;
290};
291
292static const struct dio200_board dio200_boards[] = {
293 {
294 .name = "pc212e",
295 .bustype = isa_bustype,
296 .model = pc212e_model,
297 .layout = pc212_layout,
298 },
299 {
300 .name = "pc214e",
301 .bustype = isa_bustype,
302 .model = pc214e_model,
303 .layout = pc214_layout,
304 },
305 {
306 .name = "pc215e",
307 .bustype = isa_bustype,
308 .model = pc215e_model,
309 .layout = pc215_layout,
310 },
311#ifdef CONFIG_COMEDI_PCI
312 {
313 .name = "pci215",
314 .devid = PCI_DEVICE_ID_AMPLICON_PCI215,
315 .bustype = pci_bustype,
316 .model = pci215_model,
317 .layout = pc215_layout,
318 },
319#endif
320 {
321 .name = "pc218e",
322 .bustype = isa_bustype,
323 .model = pc218e_model,
324 .layout = pc218_layout,
325 },
326 {
327 .name = "pc272e",
328 .bustype = isa_bustype,
329 .model = pc272e_model,
330 .layout = pc272_layout,
331 },
332#ifdef CONFIG_COMEDI_PCI
333 {
334 .name = "pci272",
335 .devid = PCI_DEVICE_ID_AMPLICON_PCI272,
336 .bustype = pci_bustype,
337 .model = pci272_model,
338 .layout = pc272_layout,
339 },
340#endif
341#ifdef CONFIG_COMEDI_PCI
342 {
343 .name = DIO200_DRIVER_NAME,
344 .devid = PCI_DEVICE_ID_INVALID,
345 .bustype = pci_bustype,
346 .model = anypci_model, /* wildcard */
347 },
348#endif
349};
350
351/*
352 * Layout descriptions - some ISA and PCI board descriptions share the same
353 * layout.
354 */
355
356enum dio200_sdtype { sd_none, sd_intr, sd_8255, sd_8254 };
357
358#define DIO200_MAX_SUBDEVS 7
359#define DIO200_MAX_ISNS 6
360
361struct dio200_layout_struct {
362 unsigned short n_subdevs; /* number of subdevices */
363 unsigned char sdtype[DIO200_MAX_SUBDEVS]; /* enum dio200_sdtype */
364 unsigned char sdinfo[DIO200_MAX_SUBDEVS]; /* depends on sdtype */
365 char has_int_sce; /* has interrupt enable/status register */
366 char has_clk_gat_sce; /* has clock/gate selection registers */
367};
368
369static const struct dio200_layout_struct dio200_layouts[] = {
370 [pc212_layout] = {
371 .n_subdevs = 6,
372 .sdtype = {sd_8255, sd_8254, sd_8254, sd_8254,
373 sd_8254,
374 sd_intr},
375 .sdinfo = {0x00, 0x08, 0x0C, 0x10, 0x14,
376 0x3F},
377 .has_int_sce = 1,
378 .has_clk_gat_sce = 1,
379 },
380 [pc214_layout] = {
381 .n_subdevs = 4,
382 .sdtype = {sd_8255, sd_8255, sd_8254,
383 sd_intr},
384 .sdinfo = {0x00, 0x08, 0x10, 0x01},
385 .has_int_sce = 0,
386 .has_clk_gat_sce = 0,
387 },
388 [pc215_layout] = {
389 .n_subdevs = 5,
390 .sdtype = {sd_8255, sd_8255, sd_8254,
391 sd_8254,
392 sd_intr},
393 .sdinfo = {0x00, 0x08, 0x10, 0x14, 0x3F},
394 .has_int_sce = 1,
395 .has_clk_gat_sce = 1,
396 },
397 [pc218_layout] = {
398 .n_subdevs = 7,
399 .sdtype = {sd_8254, sd_8254, sd_8255, sd_8254,
400 sd_8254,
401 sd_intr},
402 .sdinfo = {0x00, 0x04, 0x08, 0x0C, 0x10,
403 0x14,
404 0x3F},
405 .has_int_sce = 1,
406 .has_clk_gat_sce = 1,
407 },
408 [pc272_layout] = {
409 .n_subdevs = 4,
410 .sdtype = {sd_8255, sd_8255, sd_8255,
411 sd_intr},
412 .sdinfo = {0x00, 0x08, 0x10, 0x3F},
413 .has_int_sce = 1,
414 .has_clk_gat_sce = 0,
415 },
416};
417
418/*
419 * PCI driver table.
420 */
421
422#ifdef CONFIG_COMEDI_PCI
423static DEFINE_PCI_DEVICE_TABLE(dio200_pci_table) = {
424 {
425 PCI_VENDOR_ID_AMPLICON, PCI_DEVICE_ID_AMPLICON_PCI215,
426 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, {
427 PCI_VENDOR_ID_AMPLICON, PCI_DEVICE_ID_AMPLICON_PCI272,
428 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, {
429 0}
430};
431
432MODULE_DEVICE_TABLE(pci, dio200_pci_table);
433#endif /* CONFIG_COMEDI_PCI */
434
435/*
436 * Useful for shorthand access to the particular board structure
437 */
438#define thisboard ((const struct dio200_board *)dev->board_ptr)
439#define thislayout (&dio200_layouts[((struct dio200_board *) \
440 dev->board_ptr)->layout])
441
442/* this structure is for data unique to this hardware driver. If
443 several hardware drivers keep similar information in this structure,
444 feel free to suggest moving the variable to the struct comedi_device struct.
445 */
446struct dio200_private {
447#ifdef CONFIG_COMEDI_PCI
448 struct pci_dev *pci_dev; /* PCI device */
449#endif
450 int intr_sd;
451};
452
453#define devpriv ((struct dio200_private *)dev->private)
454
455struct dio200_subdev_8254 {
456 unsigned long iobase; /* Counter base address */
457 unsigned long clk_sce_iobase; /* CLK_SCE base address */
458 unsigned long gat_sce_iobase; /* GAT_SCE base address */
459 int which; /* Bit 5 of CLK_SCE or GAT_SCE */
460 int has_clk_gat_sce;
461 unsigned clock_src[3]; /* Current clock sources */
462 unsigned gate_src[3]; /* Current gate sources */
463 spinlock_t spinlock;
464};
465
466struct dio200_subdev_intr {
467 unsigned long iobase;
468 spinlock_t spinlock;
469 int active;
470 int has_int_sce;
471 unsigned int valid_isns;
472 unsigned int enabled_isns;
473 unsigned int stopcount;
474 int continuous;
475};
476
477/*
478 * The struct comedi_driver structure tells the Comedi core module
479 * which functions to call to configure/deconfigure (attach/detach)
480 * the board, and also about the kernel module that contains
481 * the device code.
482 */
483static int dio200_attach(struct comedi_device *dev,
484 struct comedi_devconfig *it);
485static int dio200_detach(struct comedi_device *dev);
486static struct comedi_driver driver_amplc_dio200 = {
487 .driver_name = DIO200_DRIVER_NAME,
488 .module = THIS_MODULE,
489 .attach = dio200_attach,
490 .detach = dio200_detach,
491 .board_name = &dio200_boards[0].name,
492 .offset = sizeof(struct dio200_board),
493 .num_names = ARRAY_SIZE(dio200_boards),
494};
495
496#ifdef CONFIG_COMEDI_PCI
497static int __devinit driver_amplc_dio200_pci_probe(struct pci_dev *dev,
498 const struct pci_device_id
499 *ent)
500{
501 return comedi_pci_auto_config(dev, driver_amplc_dio200.driver_name);
502}
503
504static void __devexit driver_amplc_dio200_pci_remove(struct pci_dev *dev)
505{
506 comedi_pci_auto_unconfig(dev);
507}
508
509static struct pci_driver driver_amplc_dio200_pci_driver = {
510 .id_table = dio200_pci_table,
511 .probe = &driver_amplc_dio200_pci_probe,
512 .remove = __devexit_p(&driver_amplc_dio200_pci_remove)
513};
514
515static int __init driver_amplc_dio200_init_module(void)
516{
517 int retval;
518
519 retval = comedi_driver_register(&driver_amplc_dio200);
520 if (retval < 0)
521 return retval;
522
523 driver_amplc_dio200_pci_driver.name =
524 (char *)driver_amplc_dio200.driver_name;
525 return pci_register_driver(&driver_amplc_dio200_pci_driver);
526}
527
528static void __exit driver_amplc_dio200_cleanup_module(void)
529{
530 pci_unregister_driver(&driver_amplc_dio200_pci_driver);
531 comedi_driver_unregister(&driver_amplc_dio200);
532}
533
534module_init(driver_amplc_dio200_init_module);
535module_exit(driver_amplc_dio200_cleanup_module);
536#else
537static int __init driver_amplc_dio200_init_module(void)
538{
539 return comedi_driver_register(&driver_amplc_dio200);
540}
541
542static void __exit driver_amplc_dio200_cleanup_module(void)
543{
544 comedi_driver_unregister(&driver_amplc_dio200);
545}
546
547module_init(driver_amplc_dio200_init_module);
548module_exit(driver_amplc_dio200_cleanup_module);
549#endif
550
551/*
552 * This function looks for a PCI device matching the requested board name,
553 * bus and slot.
554 */
555#ifdef CONFIG_COMEDI_PCI
556static int
557dio200_find_pci(struct comedi_device *dev, int bus, int slot,
558 struct pci_dev **pci_dev_p)
559{
560 struct pci_dev *pci_dev = NULL;
561
562 *pci_dev_p = NULL;
563
564 /* Look for matching PCI device. */
565 for (pci_dev = pci_get_device(PCI_VENDOR_ID_AMPLICON, PCI_ANY_ID, NULL);
566 pci_dev != NULL;
567 pci_dev = pci_get_device(PCI_VENDOR_ID_AMPLICON,
568 PCI_ANY_ID, pci_dev)) {
569 /* If bus/slot specified, check them. */
570 if (bus || slot) {
571 if (bus != pci_dev->bus->number
572 || slot != PCI_SLOT(pci_dev->devfn))
573 continue;
574 }
575 if (thisboard->model == anypci_model) {
576 /* Match any supported model. */
577 int i;
578
579 for (i = 0; i < ARRAY_SIZE(dio200_boards); i++) {
580 if (dio200_boards[i].bustype != pci_bustype)
581 continue;
582 if (pci_dev->device == dio200_boards[i].devid) {
583 /* Change board_ptr to matched board. */
584 dev->board_ptr = &dio200_boards[i];
585 break;
586 }
587 }
588 if (i == ARRAY_SIZE(dio200_boards))
589 continue;
590 } else {
591 /* Match specific model name. */
592 if (pci_dev->device != thisboard->devid)
593 continue;
594 }
595
596 /* Found a match. */
597 *pci_dev_p = pci_dev;
598 return 0;
599 }
600 /* No match found. */
601 if (bus || slot) {
602 printk(KERN_ERR
603 "comedi%d: error! no %s found at pci %02x:%02x!\n",
604 dev->minor, thisboard->name, bus, slot);
605 } else {
606 printk(KERN_ERR "comedi%d: error! no %s found!\n",
607 dev->minor, thisboard->name);
608 }
609 return -EIO;
610}
611#endif
612
613/*
614 * This function checks and requests an I/O region, reporting an error
615 * if there is a conflict.
616 */
617static int
618dio200_request_region(unsigned minor, unsigned long from, unsigned long extent)
619{
620 if (!from || !request_region(from, extent, DIO200_DRIVER_NAME)) {
621 printk(KERN_ERR "comedi%d: I/O port conflict (%#lx,%lu)!\n",
622 minor, from, extent);
623 return -EIO;
624 }
625 return 0;
626}
627
628/*
629 * 'insn_bits' function for an 'INTERRUPT' subdevice.
630 */
631static int
632dio200_subdev_intr_insn_bits(struct comedi_device *dev,
633 struct comedi_subdevice *s,
634 struct comedi_insn *insn, unsigned int *data)
635{
636 struct dio200_subdev_intr *subpriv = s->private;
637
638 if (subpriv->has_int_sce) {
639 /* Just read the interrupt status register. */
640 data[1] = inb(subpriv->iobase) & subpriv->valid_isns;
641 } else {
642 /* No interrupt status register. */
643 data[0] = 0;
644 }
645
646 return 2;
647}
648
649/*
650 * Called to stop acquisition for an 'INTERRUPT' subdevice.
651 */
652static void dio200_stop_intr(struct comedi_device *dev,
653 struct comedi_subdevice *s)
654{
655 struct dio200_subdev_intr *subpriv = s->private;
656
657 subpriv->active = 0;
658 subpriv->enabled_isns = 0;
659 if (subpriv->has_int_sce)
660 outb(0, subpriv->iobase);
661}
662
663/*
664 * Called to start acquisition for an 'INTERRUPT' subdevice.
665 */
666static int dio200_start_intr(struct comedi_device *dev,
667 struct comedi_subdevice *s)
668{
669 unsigned int n;
670 unsigned isn_bits;
671 struct dio200_subdev_intr *subpriv = s->private;
672 struct comedi_cmd *cmd = &s->async->cmd;
673 int retval = 0;
674
675 if (!subpriv->continuous && subpriv->stopcount == 0) {
676 /* An empty acquisition! */
677 s->async->events |= COMEDI_CB_EOA;
678 subpriv->active = 0;
679 retval = 1;
680 } else {
681 /* Determine interrupt sources to enable. */
682 isn_bits = 0;
683 if (cmd->chanlist) {
684 for (n = 0; n < cmd->chanlist_len; n++)
685 isn_bits |= (1U << CR_CHAN(cmd->chanlist[n]));
686 }
687 isn_bits &= subpriv->valid_isns;
688 /* Enable interrupt sources. */
689 subpriv->enabled_isns = isn_bits;
690 if (subpriv->has_int_sce)
691 outb(isn_bits, subpriv->iobase);
692 }
693
694 return retval;
695}
696
697/*
698 * Internal trigger function to start acquisition for an 'INTERRUPT' subdevice.
699 */
700static int
701dio200_inttrig_start_intr(struct comedi_device *dev, struct comedi_subdevice *s,
702 unsigned int trignum)
703{
704 struct dio200_subdev_intr *subpriv;
705 unsigned long flags;
706 int event = 0;
707
708 if (trignum != 0)
709 return -EINVAL;
710
711 subpriv = s->private;
712
713 spin_lock_irqsave(&subpriv->spinlock, flags);
714 s->async->inttrig = NULL;
715 if (subpriv->active)
716 event = dio200_start_intr(dev, s);
717
718 spin_unlock_irqrestore(&subpriv->spinlock, flags);
719
720 if (event)
721 comedi_event(dev, s);
722
723 return 1;
724}
725
726/*
727 * This is called from the interrupt service routine to handle a read
728 * scan on an 'INTERRUPT' subdevice.
729 */
730static int dio200_handle_read_intr(struct comedi_device *dev,
731 struct comedi_subdevice *s)
732{
733 struct dio200_subdev_intr *subpriv = s->private;
734 unsigned triggered;
735 unsigned intstat;
736 unsigned cur_enabled;
737 unsigned int oldevents;
738 unsigned long flags;
739
740 triggered = 0;
741
742 spin_lock_irqsave(&subpriv->spinlock, flags);
743 oldevents = s->async->events;
744 if (subpriv->has_int_sce) {
745 /*
746 * Collect interrupt sources that have triggered and disable
747 * them temporarily. Loop around until no extra interrupt
748 * sources have triggered, at which point, the valid part of
749 * the interrupt status register will read zero, clearing the
750 * cause of the interrupt.
751 *
752 * Mask off interrupt sources already seen to avoid infinite
753 * loop in case of misconfiguration.
754 */
755 cur_enabled = subpriv->enabled_isns;
756 while ((intstat = (inb(subpriv->iobase) & subpriv->valid_isns
757 & ~triggered)) != 0) {
758 triggered |= intstat;
759 cur_enabled &= ~triggered;
760 outb(cur_enabled, subpriv->iobase);
761 }
762 } else {
763 /*
764 * No interrupt status register. Assume the single interrupt
765 * source has triggered.
766 */
767 triggered = subpriv->enabled_isns;
768 }
769
770 if (triggered) {
771 /*
772 * Some interrupt sources have triggered and have been
773 * temporarily disabled to clear the cause of the interrupt.
774 *
775 * Reenable them NOW to minimize the time they are disabled.
776 */
777 cur_enabled = subpriv->enabled_isns;
778 if (subpriv->has_int_sce)
779 outb(cur_enabled, subpriv->iobase);
780
781 if (subpriv->active) {
782 /*
783 * The command is still active.
784 *
785 * Ignore interrupt sources that the command isn't
786 * interested in (just in case there's a race
787 * condition).
788 */
789 if (triggered & subpriv->enabled_isns) {
790 /* Collect scan data. */
791 short val;
792 unsigned int n, ch, len;
793
794 val = 0;
795 len = s->async->cmd.chanlist_len;
796 for (n = 0; n < len; n++) {
797 ch = CR_CHAN(s->async->cmd.chanlist[n]);
798 if (triggered & (1U << ch))
799 val |= (1U << n);
800 }
801 /* Write the scan to the buffer. */
802 if (comedi_buf_put(s->async, val)) {
803 s->async->events |= (COMEDI_CB_BLOCK |
804 COMEDI_CB_EOS);
805 } else {
806 /* Error! Stop acquisition. */
807 dio200_stop_intr(dev, s);
808 s->async->events |= COMEDI_CB_ERROR
809 | COMEDI_CB_OVERFLOW;
810 comedi_error(dev, "buffer overflow");
811 }
812
813 /* Check for end of acquisition. */
814 if (!subpriv->continuous) {
815 /* stop_src == TRIG_COUNT */
816 if (subpriv->stopcount > 0) {
817 subpriv->stopcount--;
818 if (subpriv->stopcount == 0) {
819 s->async->events |=
820 COMEDI_CB_EOA;
821 dio200_stop_intr(dev,
822 s);
823 }
824 }
825 }
826 }
827 }
828 }
829 spin_unlock_irqrestore(&subpriv->spinlock, flags);
830
831 if (oldevents != s->async->events)
832 comedi_event(dev, s);
833
834 return (triggered != 0);
835}
836
837/*
838 * 'cancel' function for an 'INTERRUPT' subdevice.
839 */
840static int dio200_subdev_intr_cancel(struct comedi_device *dev,
841 struct comedi_subdevice *s)
842{
843 struct dio200_subdev_intr *subpriv = s->private;
844 unsigned long flags;
845
846 spin_lock_irqsave(&subpriv->spinlock, flags);
847 if (subpriv->active)
848 dio200_stop_intr(dev, s);
849
850 spin_unlock_irqrestore(&subpriv->spinlock, flags);
851
852 return 0;
853}
854
855/*
856 * 'do_cmdtest' function for an 'INTERRUPT' subdevice.
857 */
858static int
859dio200_subdev_intr_cmdtest(struct comedi_device *dev,
860 struct comedi_subdevice *s, struct comedi_cmd *cmd)
861{
862 int err = 0;
863 unsigned int tmp;
864
865 /* step 1: make sure trigger sources are trivially valid */
866
867 tmp = cmd->start_src;
868 cmd->start_src &= (TRIG_NOW | TRIG_INT);
869 if (!cmd->start_src || tmp != cmd->start_src)
870 err++;
871
872 tmp = cmd->scan_begin_src;
873 cmd->scan_begin_src &= TRIG_EXT;
874 if (!cmd->scan_begin_src || tmp != cmd->scan_begin_src)
875 err++;
876
877 tmp = cmd->convert_src;
878 cmd->convert_src &= TRIG_NOW;
879 if (!cmd->convert_src || tmp != cmd->convert_src)
880 err++;
881
882 tmp = cmd->scan_end_src;
883 cmd->scan_end_src &= TRIG_COUNT;
884 if (!cmd->scan_end_src || tmp != cmd->scan_end_src)
885 err++;
886
887 tmp = cmd->stop_src;
888 cmd->stop_src &= (TRIG_COUNT | TRIG_NONE);
889 if (!cmd->stop_src || tmp != cmd->stop_src)
890 err++;
891
892 if (err)
893 return 1;
894
895 /* step 2: make sure trigger sources are unique and mutually
896 compatible */
897
898 /* these tests are true if more than one _src bit is set */
899 if ((cmd->start_src & (cmd->start_src - 1)) != 0)
900 err++;
901 if ((cmd->scan_begin_src & (cmd->scan_begin_src - 1)) != 0)
902 err++;
903 if ((cmd->convert_src & (cmd->convert_src - 1)) != 0)
904 err++;
905 if ((cmd->scan_end_src & (cmd->scan_end_src - 1)) != 0)
906 err++;
907 if ((cmd->stop_src & (cmd->stop_src - 1)) != 0)
908 err++;
909
910 if (err)
911 return 2;
912
913 /* step 3: make sure arguments are trivially compatible */
914
915 /* cmd->start_src == TRIG_NOW || cmd->start_src == TRIG_INT */
916 if (cmd->start_arg != 0) {
917 cmd->start_arg = 0;
918 err++;
919 }
920
921 /* cmd->scan_begin_src == TRIG_EXT */
922 if (cmd->scan_begin_arg != 0) {
923 cmd->scan_begin_arg = 0;
924 err++;
925 }
926
927 /* cmd->convert_src == TRIG_NOW */
928 if (cmd->convert_arg != 0) {
929 cmd->convert_arg = 0;
930 err++;
931 }
932
933 /* cmd->scan_end_src == TRIG_COUNT */
934 if (cmd->scan_end_arg != cmd->chanlist_len) {
935 cmd->scan_end_arg = cmd->chanlist_len;
936 err++;
937 }
938
939 switch (cmd->stop_src) {
940 case TRIG_COUNT:
941 /* any count allowed */
942 break;
943 case TRIG_NONE:
944 if (cmd->stop_arg != 0) {
945 cmd->stop_arg = 0;
946 err++;
947 }
948 break;
949 default:
950 break;
951 }
952
953 if (err)
954 return 3;
955
956 /* step 4: fix up any arguments */
957
958 /* if (err) return 4; */
959
960 return 0;
961}
962
963/*
964 * 'do_cmd' function for an 'INTERRUPT' subdevice.
965 */
966static int dio200_subdev_intr_cmd(struct comedi_device *dev,
967 struct comedi_subdevice *s)
968{
969 struct comedi_cmd *cmd = &s->async->cmd;
970 struct dio200_subdev_intr *subpriv = s->private;
971 unsigned long flags;
972 int event = 0;
973
974 spin_lock_irqsave(&subpriv->spinlock, flags);
975 subpriv->active = 1;
976
977 /* Set up end of acquisition. */
978 switch (cmd->stop_src) {
979 case TRIG_COUNT:
980 subpriv->continuous = 0;
981 subpriv->stopcount = cmd->stop_arg;
982 break;
983 default:
984 /* TRIG_NONE */
985 subpriv->continuous = 1;
986 subpriv->stopcount = 0;
987 break;
988 }
989
990 /* Set up start of acquisition. */
991 switch (cmd->start_src) {
992 case TRIG_INT:
993 s->async->inttrig = dio200_inttrig_start_intr;
994 break;
995 default:
996 /* TRIG_NOW */
997 event = dio200_start_intr(dev, s);
998 break;
999 }
1000 spin_unlock_irqrestore(&subpriv->spinlock, flags);
1001
1002 if (event)
1003 comedi_event(dev, s);
1004
1005 return 0;
1006}
1007
1008/*
1009 * This function initializes an 'INTERRUPT' subdevice.
1010 */
1011static int
1012dio200_subdev_intr_init(struct comedi_device *dev, struct comedi_subdevice *s,
1013 unsigned long iobase, unsigned valid_isns,
1014 int has_int_sce)
1015{
1016 struct dio200_subdev_intr *subpriv;
1017
1018 subpriv = kzalloc(sizeof(*subpriv), GFP_KERNEL);
1019 if (!subpriv) {
1020 printk(KERN_ERR "comedi%d: error! out of memory!\n",
1021 dev->minor);
1022 return -ENOMEM;
1023 }
1024 subpriv->iobase = iobase;
1025 subpriv->has_int_sce = has_int_sce;
1026 subpriv->valid_isns = valid_isns;
1027 spin_lock_init(&subpriv->spinlock);
1028
1029 if (has_int_sce)
1030 outb(0, subpriv->iobase); /* Disable interrupt sources. */
1031
1032 s->private = subpriv;
1033 s->type = COMEDI_SUBD_DI;
1034 s->subdev_flags = SDF_READABLE | SDF_CMD_READ;
1035 if (has_int_sce) {
1036 s->n_chan = DIO200_MAX_ISNS;
1037 s->len_chanlist = DIO200_MAX_ISNS;
1038 } else {
1039 /* No interrupt source register. Support single channel. */
1040 s->n_chan = 1;
1041 s->len_chanlist = 1;
1042 }
1043 s->range_table = &range_digital;
1044 s->maxdata = 1;
1045 s->insn_bits = dio200_subdev_intr_insn_bits;
1046 s->do_cmdtest = dio200_subdev_intr_cmdtest;
1047 s->do_cmd = dio200_subdev_intr_cmd;
1048 s->cancel = dio200_subdev_intr_cancel;
1049
1050 return 0;
1051}
1052
1053/*
1054 * This function cleans up an 'INTERRUPT' subdevice.
1055 */
1056static void
1057dio200_subdev_intr_cleanup(struct comedi_device *dev,
1058 struct comedi_subdevice *s)
1059{
1060 struct dio200_subdev_intr *subpriv = s->private;
1061 kfree(subpriv);
1062}
1063
1064/*
1065 * Interrupt service routine.
1066 */
1067static irqreturn_t dio200_interrupt(int irq, void *d)
1068{
1069 struct comedi_device *dev = d;
1070 int handled;
1071
1072 if (!dev->attached)
1073 return IRQ_NONE;
1074
1075 if (devpriv->intr_sd >= 0) {
1076 handled = dio200_handle_read_intr(dev,
1077 dev->subdevices +
1078 devpriv->intr_sd);
1079 } else {
1080 handled = 0;
1081 }
1082
1083 return IRQ_RETVAL(handled);
1084}
1085
1086/*
1087 * Handle 'insn_read' for an '8254' counter subdevice.
1088 */
1089static int
1090dio200_subdev_8254_read(struct comedi_device *dev, struct comedi_subdevice *s,
1091 struct comedi_insn *insn, unsigned int *data)
1092{
1093 struct dio200_subdev_8254 *subpriv = s->private;
1094 int chan = CR_CHAN(insn->chanspec);
1095 unsigned long flags;
1096
1097 spin_lock_irqsave(&subpriv->spinlock, flags);
1098 data[0] = i8254_read(subpriv->iobase, 0, chan);
1099 spin_unlock_irqrestore(&subpriv->spinlock, flags);
1100
1101 return 1;
1102}
1103
1104/*
1105 * Handle 'insn_write' for an '8254' counter subdevice.
1106 */
1107static int
1108dio200_subdev_8254_write(struct comedi_device *dev, struct comedi_subdevice *s,
1109 struct comedi_insn *insn, unsigned int *data)
1110{
1111 struct dio200_subdev_8254 *subpriv = s->private;
1112 int chan = CR_CHAN(insn->chanspec);
1113 unsigned long flags;
1114
1115 spin_lock_irqsave(&subpriv->spinlock, flags);
1116 i8254_write(subpriv->iobase, 0, chan, data[0]);
1117 spin_unlock_irqrestore(&subpriv->spinlock, flags);
1118
1119 return 1;
1120}
1121
1122/*
1123 * Set gate source for an '8254' counter subdevice channel.
1124 */
1125static int
1126dio200_set_gate_src(struct dio200_subdev_8254 *subpriv,
1127 unsigned int counter_number, unsigned int gate_src)
1128{
1129 unsigned char byte;
1130
1131 if (!subpriv->has_clk_gat_sce)
1132 return -1;
1133 if (counter_number > 2)
1134 return -1;
1135 if (gate_src > 7)
1136 return -1;
1137
1138 subpriv->gate_src[counter_number] = gate_src;
1139 byte = GAT_SCE(subpriv->which, counter_number, gate_src);
1140 outb(byte, subpriv->gat_sce_iobase);
1141
1142 return 0;
1143}
1144
1145/*
1146 * Get gate source for an '8254' counter subdevice channel.
1147 */
1148static int
1149dio200_get_gate_src(struct dio200_subdev_8254 *subpriv,
1150 unsigned int counter_number)
1151{
1152 if (!subpriv->has_clk_gat_sce)
1153 return -1;
1154 if (counter_number > 2)
1155 return -1;
1156
1157 return subpriv->gate_src[counter_number];
1158}
1159
1160/*
1161 * Set clock source for an '8254' counter subdevice channel.
1162 */
1163static int
1164dio200_set_clock_src(struct dio200_subdev_8254 *subpriv,
1165 unsigned int counter_number, unsigned int clock_src)
1166{
1167 unsigned char byte;
1168
1169 if (!subpriv->has_clk_gat_sce)
1170 return -1;
1171 if (counter_number > 2)
1172 return -1;
1173 if (clock_src > 7)
1174 return -1;
1175
1176 subpriv->clock_src[counter_number] = clock_src;
1177 byte = CLK_SCE(subpriv->which, counter_number, clock_src);
1178 outb(byte, subpriv->clk_sce_iobase);
1179
1180 return 0;
1181}
1182
1183/*
1184 * Get clock source for an '8254' counter subdevice channel.
1185 */
1186static int
1187dio200_get_clock_src(struct dio200_subdev_8254 *subpriv,
1188 unsigned int counter_number, unsigned int *period_ns)
1189{
1190 unsigned clock_src;
1191
1192 if (!subpriv->has_clk_gat_sce)
1193 return -1;
1194 if (counter_number > 2)
1195 return -1;
1196
1197 clock_src = subpriv->clock_src[counter_number];
1198 *period_ns = clock_period[clock_src];
1199 return clock_src;
1200}
1201
1202/*
1203 * Handle 'insn_config' for an '8254' counter subdevice.
1204 */
1205static int
1206dio200_subdev_8254_config(struct comedi_device *dev, struct comedi_subdevice *s,
1207 struct comedi_insn *insn, unsigned int *data)
1208{
1209 struct dio200_subdev_8254 *subpriv = s->private;
1210 int ret = 0;
1211 int chan = CR_CHAN(insn->chanspec);
1212 unsigned long flags;
1213
1214 spin_lock_irqsave(&subpriv->spinlock, flags);
1215 switch (data[0]) {
1216 case INSN_CONFIG_SET_COUNTER_MODE:
1217 ret = i8254_set_mode(subpriv->iobase, 0, chan, data[1]);
1218 if (ret < 0)
1219 ret = -EINVAL;
1220 break;
1221 case INSN_CONFIG_8254_READ_STATUS:
1222 data[1] = i8254_status(subpriv->iobase, 0, chan);
1223 break;
1224 case INSN_CONFIG_SET_GATE_SRC:
1225 ret = dio200_set_gate_src(subpriv, chan, data[2]);
1226 if (ret < 0)
1227 ret = -EINVAL;
1228 break;
1229 case INSN_CONFIG_GET_GATE_SRC:
1230 ret = dio200_get_gate_src(subpriv, chan);
1231 if (ret < 0) {
1232 ret = -EINVAL;
1233 break;
1234 }
1235 data[2] = ret;
1236 break;
1237 case INSN_CONFIG_SET_CLOCK_SRC:
1238 ret = dio200_set_clock_src(subpriv, chan, data[1]);
1239 if (ret < 0)
1240 ret = -EINVAL;
1241 break;
1242 case INSN_CONFIG_GET_CLOCK_SRC:
1243 ret = dio200_get_clock_src(subpriv, chan, &data[2]);
1244 if (ret < 0) {
1245 ret = -EINVAL;
1246 break;
1247 }
1248 data[1] = ret;
1249 break;
1250 default:
1251 ret = -EINVAL;
1252 break;
1253 }
1254 spin_unlock_irqrestore(&subpriv->spinlock, flags);
1255 return ret < 0 ? ret : insn->n;
1256}
1257
1258/*
1259 * This function initializes an '8254' counter subdevice.
1260 *
1261 * Note: iobase is the base address of the board, not the subdevice;
1262 * offset is the offset to the 8254 chip.
1263 */
1264static int
1265dio200_subdev_8254_init(struct comedi_device *dev, struct comedi_subdevice *s,
1266 unsigned long iobase, unsigned offset,
1267 int has_clk_gat_sce)
1268{
1269 struct dio200_subdev_8254 *subpriv;
1270 unsigned int chan;
1271
1272 subpriv = kzalloc(sizeof(*subpriv), GFP_KERNEL);
1273 if (!subpriv) {
1274 printk(KERN_ERR "comedi%d: error! out of memory!\n",
1275 dev->minor);
1276 return -ENOMEM;
1277 }
1278
1279 s->private = subpriv;
1280 s->type = COMEDI_SUBD_COUNTER;
1281 s->subdev_flags = SDF_WRITABLE | SDF_READABLE;
1282 s->n_chan = 3;
1283 s->maxdata = 0xFFFF;
1284 s->insn_read = dio200_subdev_8254_read;
1285 s->insn_write = dio200_subdev_8254_write;
1286 s->insn_config = dio200_subdev_8254_config;
1287
1288 spin_lock_init(&subpriv->spinlock);
1289 subpriv->iobase = offset + iobase;
1290 subpriv->has_clk_gat_sce = has_clk_gat_sce;
1291 if (has_clk_gat_sce) {
1292 /* Derive CLK_SCE and GAT_SCE register offsets from
1293 * 8254 offset. */
1294 subpriv->clk_sce_iobase =
1295 DIO200_XCLK_SCE + (offset >> 3) + iobase;
1296 subpriv->gat_sce_iobase =
1297 DIO200_XGAT_SCE + (offset >> 3) + iobase;
1298 subpriv->which = (offset >> 2) & 1;
1299 }
1300
1301 /* Initialize channels. */
1302 for (chan = 0; chan < 3; chan++) {
1303 i8254_set_mode(subpriv->iobase, 0, chan,
1304 I8254_MODE0 | I8254_BINARY);
1305 if (subpriv->has_clk_gat_sce) {
1306 /* Gate source 0 is VCC (logic 1). */
1307 dio200_set_gate_src(subpriv, chan, 0);
1308 /* Clock source 0 is the dedicated clock input. */
1309 dio200_set_clock_src(subpriv, chan, 0);
1310 }
1311 }
1312
1313 return 0;
1314}
1315
1316/*
1317 * This function cleans up an '8254' counter subdevice.
1318 */
1319static void
1320dio200_subdev_8254_cleanup(struct comedi_device *dev,
1321 struct comedi_subdevice *s)
1322{
1323 struct dio200_subdev_intr *subpriv = s->private;
1324 kfree(subpriv);
1325}
1326
1327/*
1328 * Attach is called by the Comedi core to configure the driver
1329 * for a particular board. If you specified a board_name array
1330 * in the driver structure, dev->board_ptr contains that
1331 * address.
1332 */
1333static int dio200_attach(struct comedi_device *dev, struct comedi_devconfig *it)
1334{
1335 struct comedi_subdevice *s;
1336 unsigned long iobase = 0;
1337 unsigned int irq = 0;
1338#ifdef CONFIG_COMEDI_PCI
1339 struct pci_dev *pci_dev = NULL;
1340 int bus = 0, slot = 0;
1341#endif
1342 const struct dio200_layout_struct *layout;
1343 int share_irq = 0;
1344 int sdx;
1345 unsigned n;
1346 int ret;
1347
1348 printk(KERN_DEBUG "comedi%d: %s: attach\n", dev->minor,
1349 DIO200_DRIVER_NAME);
1350
1351 ret = alloc_private(dev, sizeof(struct dio200_private));
1352 if (ret < 0) {
1353 printk(KERN_ERR "comedi%d: error! out of memory!\n",
1354 dev->minor);
1355 return ret;
1356 }
1357
1358 /* Process options. */
1359 switch (thisboard->bustype) {
1360 case isa_bustype:
1361 iobase = it->options[0];
1362 irq = it->options[1];
1363 share_irq = 0;
1364 break;
1365#ifdef CONFIG_COMEDI_PCI
1366 case pci_bustype:
1367 bus = it->options[0];
1368 slot = it->options[1];
1369 share_irq = 1;
1370
1371 ret = dio200_find_pci(dev, bus, slot, &pci_dev);
1372 if (ret < 0)
1373 return ret;
1374 devpriv->pci_dev = pci_dev;
1375 break;
1376#endif
1377 default:
1378 printk(KERN_ERR
1379 "comedi%d: %s: BUG! cannot determine board type!\n",
1380 dev->minor, DIO200_DRIVER_NAME);
1381 return -EINVAL;
1382 break;
1383 }
1384
1385 devpriv->intr_sd = -1;
1386
1387 /* Enable device and reserve I/O spaces. */
1388#ifdef CONFIG_COMEDI_PCI
1389 if (pci_dev) {
1390 ret = comedi_pci_enable(pci_dev, DIO200_DRIVER_NAME);
1391 if (ret < 0) {
1392 printk(KERN_ERR
1393 "comedi%d: error! cannot enable PCI device and request regions!\n",
1394 dev->minor);
1395 return ret;
1396 }
1397 iobase = pci_resource_start(pci_dev, 2);
1398 irq = pci_dev->irq;
1399 } else
1400#endif
1401 {
1402 ret = dio200_request_region(dev->minor, iobase, DIO200_IO_SIZE);
1403 if (ret < 0)
1404 return ret;
1405 }
1406 dev->iobase = iobase;
1407
1408 layout = thislayout;
1409
1410 ret = alloc_subdevices(dev, layout->n_subdevs);
1411 if (ret < 0) {
1412 printk(KERN_ERR "comedi%d: error! out of memory!\n",
1413 dev->minor);
1414 return ret;
1415 }
1416
1417 for (n = 0; n < dev->n_subdevices; n++) {
1418 s = &dev->subdevices[n];
1419 switch (layout->sdtype[n]) {
1420 case sd_8254:
1421 /* counter subdevice (8254) */
1422 ret = dio200_subdev_8254_init(dev, s, iobase,
1423 layout->sdinfo[n],
1424 layout->has_clk_gat_sce);
1425 if (ret < 0)
1426 return ret;
1427
1428 break;
1429 case sd_8255:
1430 /* digital i/o subdevice (8255) */
1431 ret = subdev_8255_init(dev, s, NULL,
1432 iobase + layout->sdinfo[n]);
1433 if (ret < 0)
1434 return ret;
1435
1436 break;
1437 case sd_intr:
1438 /* 'INTERRUPT' subdevice */
1439 if (irq) {
1440 ret = dio200_subdev_intr_init(dev, s,
1441 iobase +
1442 DIO200_INT_SCE,
1443 layout->sdinfo[n],
1444 layout->
1445 has_int_sce);
1446 if (ret < 0)
1447 return ret;
1448
1449 devpriv->intr_sd = n;
1450 } else {
1451 s->type = COMEDI_SUBD_UNUSED;
1452 }
1453 break;
1454 default:
1455 s->type = COMEDI_SUBD_UNUSED;
1456 break;
1457 }
1458 }
1459
1460 sdx = devpriv->intr_sd;
1461 if (sdx >= 0 && sdx < dev->n_subdevices)
1462 dev->read_subdev = &dev->subdevices[sdx];
1463
1464 dev->board_name = thisboard->name;
1465
1466 if (irq) {
1467 unsigned long flags = share_irq ? IRQF_SHARED : 0;
1468
1469 if (request_irq(irq, dio200_interrupt, flags,
1470 DIO200_DRIVER_NAME, dev) >= 0) {
1471 dev->irq = irq;
1472 } else {
1473 printk(KERN_WARNING
1474 "comedi%d: warning! irq %u unavailable!\n",
1475 dev->minor, irq);
1476 }
1477 }
1478
1479 printk(KERN_INFO "comedi%d: %s ", dev->minor, dev->board_name);
1480 if (thisboard->bustype == isa_bustype) {
1481 printk("(base %#lx) ", iobase);
1482 } else {
1483#ifdef CONFIG_COMEDI_PCI
1484 printk("(pci %s) ", pci_name(pci_dev));
1485#endif
1486 }
1487 if (irq)
1488 printk("(irq %u%s) ", irq, (dev->irq ? "" : " UNAVAILABLE"));
1489 else
1490 printk("(no irq) ");
1491
1492 printk("attached\n");
1493
1494 return 1;
1495}
1496
1497/*
1498 * _detach is called to deconfigure a device. It should deallocate
1499 * resources.
1500 * This function is also called when _attach() fails, so it should be
1501 * careful not to release resources that were not necessarily
1502 * allocated by _attach(). dev->private and dev->subdevices are
1503 * deallocated automatically by the core.
1504 */
1505static int dio200_detach(struct comedi_device *dev)
1506{
1507 const struct dio200_layout_struct *layout;
1508 unsigned n;
1509
1510 printk(KERN_DEBUG "comedi%d: %s: detach\n", dev->minor,
1511 DIO200_DRIVER_NAME);
1512
1513 if (dev->irq)
1514 free_irq(dev->irq, dev);
1515 if (dev->subdevices) {
1516 layout = thislayout;
1517 for (n = 0; n < dev->n_subdevices; n++) {
1518 struct comedi_subdevice *s = &dev->subdevices[n];
1519 switch (layout->sdtype[n]) {
1520 case sd_8254:
1521 dio200_subdev_8254_cleanup(dev, s);
1522 break;
1523 case sd_8255:
1524 subdev_8255_cleanup(dev, s);
1525 break;
1526 case sd_intr:
1527 dio200_subdev_intr_cleanup(dev, s);
1528 break;
1529 default:
1530 break;
1531 }
1532 }
1533 }
1534 if (devpriv) {
1535#ifdef CONFIG_COMEDI_PCI
1536 if (devpriv->pci_dev) {
1537 if (dev->iobase)
1538 comedi_pci_disable(devpriv->pci_dev);
1539 pci_dev_put(devpriv->pci_dev);
1540 } else
1541#endif
1542 {
1543 if (dev->iobase)
1544 release_region(dev->iobase, DIO200_IO_SIZE);
1545 }
1546 }
1547 if (dev->board_name)
1548 printk(KERN_INFO "comedi%d: %s removed\n",
1549 dev->minor, dev->board_name);
1550
1551 return 0;
1552}
1553
1554MODULE_AUTHOR("Comedi http://www.comedi.org");
1555MODULE_DESCRIPTION("Comedi low-level driver");
1556MODULE_LICENSE("GPL");