2 comedi/drivers/dmm32at.c
3 Diamond Systems mm32at code for a Comedi driver
5 COMEDI - Linux Control and Measurement Device Interface
6 Copyright (C) 2000 David A. Schleef <ds@schleef.org>
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 Description: Diamond Systems mm32at driver.
27 Author: Perry J. Piplani <perry.j.piplani@nasa.gov>
28 Updated: Fri Jun 4 09:13:24 CDT 2004
31 This driver is for the Diamond Systems MM-32-AT board
32 http://www.diamondsystems.com/products/diamondmm32at It is being used
33 on serveral projects inside NASA, without problems so far. For analog
34 input commands, TRIG_EXT is not yet supported at all..
36 Configuration Options:
37 comedi_config /dev/comedi0 dmm32at baseaddr,irq
41 * The previous block comment is used to automatically generate
42 * documentation in Comedi and Comedilib. The fields:
44 * Driver: the name of the driver
45 * Description: a short phrase describing the driver. Don't list boards.
46 * Devices: a full list of the boards that attempt to be supported by
47 * the driver. Format is "(manufacturer) board name [comedi name]",
48 * where comedi_name is the name that is used to configure the board.
49 * See the comment near board_name: in the struct comedi_driver structure
50 * below. If (manufacturer) or [comedi name] is missing, the previous
53 * Updated: date when the _documentation_ was last updated. Use 'date -R'
54 * to get a value for this.
55 * Status: a one-word description of the status. Valid values are:
56 * works - driver works correctly on most boards supported, and
58 * unknown - unknown. Usually put there by ds.
59 * experimental - may not work in any particular release. Author
60 * probably wants assistance testing it.
61 * bitrotten - driver has not been update in a long time, probably
62 * doesn't work, and probably is missing support for significant
63 * Comedi interface features.
64 * untested - author probably wrote it "blind", and is believed to
65 * work, but no confirmation.
67 * These headers should be followed by a blank line, and any comments
68 * you wish to say about the driver. The comment area is the place
69 * to put any known bugs, limitations, unsupported features, supported
70 * command triggers, whether or not commands are supported on particular
73 * Somewhere in the comment should be information about configuration
74 * options that are used with comedi_config.
77 #include "../comedidev.h"
78 #include <linux/ioport.h>
80 /* Board register addresses */
82 #define DMM32AT_MEMSIZE 0x10
84 #define DMM32AT_CONV 0x00
85 #define DMM32AT_AILSB 0x00
86 #define DMM32AT_AUXDOUT 0x01
87 #define DMM32AT_AIMSB 0x01
88 #define DMM32AT_AILOW 0x02
89 #define DMM32AT_AIHIGH 0x03
91 #define DMM32AT_DACLSB 0x04
92 #define DMM32AT_DACSTAT 0x04
93 #define DMM32AT_DACMSB 0x05
95 #define DMM32AT_FIFOCNTRL 0x07
96 #define DMM32AT_FIFOSTAT 0x07
98 #define DMM32AT_CNTRL 0x08
99 #define DMM32AT_AISTAT 0x08
101 #define DMM32AT_INTCLOCK 0x09
103 #define DMM32AT_CNTRDIO 0x0a
105 #define DMM32AT_AICONF 0x0b
106 #define DMM32AT_AIRBACK 0x0b
108 #define DMM32AT_CLK1 0x0d
109 #define DMM32AT_CLK2 0x0e
110 #define DMM32AT_CLKCT 0x0f
112 #define DMM32AT_DIOA 0x0c
113 #define DMM32AT_DIOB 0x0d
114 #define DMM32AT_DIOC 0x0e
115 #define DMM32AT_DIOCONF 0x0f
117 #define dmm_inb(cdev, reg) inb((cdev->iobase)+reg)
118 #define dmm_outb(cdev, reg, valu) outb(valu, (cdev->iobase)+reg)
120 /* Board register values. */
122 /* DMM32AT_DACSTAT 0x04 */
123 #define DMM32AT_DACBUSY 0x80
125 /* DMM32AT_FIFOCNTRL 0x07 */
126 #define DMM32AT_FIFORESET 0x02
127 #define DMM32AT_SCANENABLE 0x04
129 /* DMM32AT_CNTRL 0x08 */
130 #define DMM32AT_RESET 0x20
131 #define DMM32AT_INTRESET 0x08
132 #define DMM32AT_CLKACC 0x00
133 #define DMM32AT_DIOACC 0x01
135 /* DMM32AT_AISTAT 0x08 */
136 #define DMM32AT_STATUS 0x80
138 /* DMM32AT_INTCLOCK 0x09 */
139 #define DMM32AT_ADINT 0x80
140 #define DMM32AT_CLKSEL 0x03
142 /* DMM32AT_CNTRDIO 0x0a */
143 #define DMM32AT_FREQ12 0x80
145 /* DMM32AT_AICONF 0x0b */
146 #define DMM32AT_RANGE_U10 0x0c
147 #define DMM32AT_RANGE_U5 0x0d
148 #define DMM32AT_RANGE_B10 0x08
149 #define DMM32AT_RANGE_B5 0x00
150 #define DMM32AT_SCINT_20 0x00
151 #define DMM32AT_SCINT_15 0x10
152 #define DMM32AT_SCINT_10 0x20
153 #define DMM32AT_SCINT_5 0x30
155 /* DMM32AT_CLKCT 0x0f */
156 #define DMM32AT_CLKCT1 0x56 /* mode3 counter 1 - write low byte only */
157 #define DMM32AT_CLKCT2 0xb6 /* mode3 counter 2 - write high and low byte */
159 /* DMM32AT_DIOCONF 0x0f */
160 #define DMM32AT_DIENABLE 0x80
161 #define DMM32AT_DIRA 0x10
162 #define DMM32AT_DIRB 0x02
163 #define DMM32AT_DIRCL 0x01
164 #define DMM32AT_DIRCH 0x08
166 /* board AI ranges in comedi structure */
167 static const struct comedi_lrange dmm32at_airanges
= {
177 /* register values for above ranges */
178 static const unsigned char dmm32at_rangebits
[] = {
185 /* only one of these ranges is valid, as set by a jumper on the
186 * board. The application should only use the range set by the jumper
188 static const struct comedi_lrange dmm32at_aoranges
= {
199 * Board descriptions for two imaginary boards. Describing the
200 * boards in this way is optional, and completely driver-dependent.
201 * Some drivers use arrays such as this, other do not.
203 struct dmm32at_board
{
207 const struct comedi_lrange
*ai_ranges
;
210 const struct comedi_lrange
*ao_ranges
;
214 static const struct dmm32at_board dmm32at_boards
[] = {
219 .ai_ranges
= &dmm32at_airanges
,
222 .ao_ranges
= &dmm32at_aoranges
,
229 * Useful for shorthand access to the particular board structure
231 #define thisboard ((const struct dmm32at_board *)dev->board_ptr)
233 /* this structure is for data unique to this hardware driver. If
234 * several hardware drivers keep similar information in this structure,
235 * feel free to suggest moving the variable to the struct comedi_device struct.
237 struct dmm32at_private
{
241 unsigned int ai_scans_left
;
243 /* Used for AO readback */
244 unsigned int ao_readback
[4];
245 unsigned char dio_config
;
250 * most drivers define the following macro to make it easy to
251 * access the private structure.
253 #define devpriv ((struct dmm32at_private *)dev->private)
256 * The struct comedi_driver structure tells the Comedi core module
257 * which functions to call to configure/deconfigure (attach/detach)
258 * the board, and also about the kernel module that contains
261 static int dmm32at_attach(struct comedi_device
*dev
, struct comedi_devconfig
*it
);
262 static int dmm32at_detach(struct comedi_device
*dev
);
263 static struct comedi_driver driver_dmm32at
= {
264 .driver_name
= "dmm32at",
265 .module
= THIS_MODULE
,
266 .attach
= dmm32at_attach
,
267 .detach
= dmm32at_detach
,
268 /* It is not necessary to implement the following members if you are
269 * writing a driver for a ISA PnP or PCI card */
270 /* Most drivers will support multiple types of boards by
271 * having an array of board structures. These were defined
272 * in dmm32at_boards[] above. Note that the element 'name'
273 * was first in the structure -- Comedi uses this fact to
274 * extract the name of the board without knowing any details
275 * about the structure except for its length.
276 * When a device is attached (by comedi_config), the name
277 * of the device is given to Comedi, and Comedi tries to
278 * match it by going through the list of board names. If
279 * there is a match, the address of the pointer is put
280 * into dev->board_ptr and driver->attach() is called.
282 * Note that these are not necessary if you can determine
283 * the type of board in software. ISA PnP, PCI, and PCMCIA
284 * devices are such boards.
286 .board_name
= &dmm32at_boards
[0].name
,
287 .offset
= sizeof(struct dmm32at_board
),
288 .num_names
= ARRAY_SIZE(dmm32at_boards
),
291 /* prototypes for driver functions below */
292 static int dmm32at_ai_rinsn(struct comedi_device
*dev
, struct comedi_subdevice
*s
,
293 struct comedi_insn
*insn
, unsigned int *data
);
294 static int dmm32at_ao_winsn(struct comedi_device
*dev
, struct comedi_subdevice
*s
,
295 struct comedi_insn
*insn
, unsigned int *data
);
296 static int dmm32at_ao_rinsn(struct comedi_device
*dev
, struct comedi_subdevice
*s
,
297 struct comedi_insn
*insn
, unsigned int *data
);
298 static int dmm32at_dio_insn_bits(struct comedi_device
*dev
, struct comedi_subdevice
*s
,
299 struct comedi_insn
*insn
, unsigned int *data
);
300 static int dmm32at_dio_insn_config(struct comedi_device
*dev
, struct comedi_subdevice
*s
,
301 struct comedi_insn
*insn
, unsigned int *data
);
302 static int dmm32at_ai_cmdtest(struct comedi_device
*dev
, struct comedi_subdevice
*s
,
303 struct comedi_cmd
*cmd
);
304 static int dmm32at_ai_cmd(struct comedi_device
*dev
, struct comedi_subdevice
*s
);
305 static int dmm32at_ai_cancel(struct comedi_device
*dev
, struct comedi_subdevice
*s
);
306 static int dmm32at_ns_to_timer(unsigned int *ns
, int round
);
307 static irqreturn_t
dmm32at_isr(int irq
, void *d
);
308 void dmm32at_setaitimer(struct comedi_device
*dev
, unsigned int nansec
);
311 * Attach is called by the Comedi core to configure the driver
312 * for a particular board. If you specified a board_name array
313 * in the driver structure, dev->board_ptr contains that
316 static int dmm32at_attach(struct comedi_device
*dev
, struct comedi_devconfig
*it
)
319 struct comedi_subdevice
*s
;
320 unsigned char aihi
, ailo
, fifostat
, aistat
, intstat
, airback
;
321 unsigned long iobase
;
324 iobase
= it
->options
[0];
325 irq
= it
->options
[1];
327 printk("comedi%d: dmm32at: attaching\n", dev
->minor
);
328 printk("dmm32at: probing at address 0x%04lx, irq %u\n", iobase
, irq
);
330 /* register address space */
331 if (!request_region(iobase
, DMM32AT_MEMSIZE
, thisboard
->name
)) {
332 printk("I/O port conflict\n");
335 dev
->iobase
= iobase
;
337 /* the following just makes sure the board is there and gets
338 it to a known state */
340 /* reset the board */
341 dmm_outb(dev
, DMM32AT_CNTRL
, DMM32AT_RESET
);
343 /* allow a millisecond to reset */
346 /* zero scan and fifo control */
347 dmm_outb(dev
, DMM32AT_FIFOCNTRL
, 0x0);
349 /* zero interrupt and clock control */
350 dmm_outb(dev
, DMM32AT_INTCLOCK
, 0x0);
352 /* write a test channel range, the high 3 bits should drop */
353 dmm_outb(dev
, DMM32AT_AILOW
, 0x80);
354 dmm_outb(dev
, DMM32AT_AIHIGH
, 0xff);
356 /* set the range at 10v unipolar */
357 dmm_outb(dev
, DMM32AT_AICONF
, DMM32AT_RANGE_U10
);
359 /* should take 10 us to settle, here's a hundred */
362 /* read back the values */
363 ailo
= dmm_inb(dev
, DMM32AT_AILOW
);
364 aihi
= dmm_inb(dev
, DMM32AT_AIHIGH
);
365 fifostat
= dmm_inb(dev
, DMM32AT_FIFOSTAT
);
366 aistat
= dmm_inb(dev
, DMM32AT_AISTAT
);
367 intstat
= dmm_inb(dev
, DMM32AT_INTCLOCK
);
368 airback
= dmm_inb(dev
, DMM32AT_AIRBACK
);
370 printk("dmm32at: lo=0x%02x hi=0x%02x fifostat=0x%02x\n",
371 ailo
, aihi
, fifostat
);
372 printk("dmm32at: aistat=0x%02x intstat=0x%02x airback=0x%02x\n",
373 aistat
, intstat
, airback
);
375 if ((ailo
!= 0x00) || (aihi
!= 0x1f) || (fifostat
!= 0x80) ||
376 (aistat
!= 0x60 || (intstat
!= 0x00) || airback
!= 0x0c)) {
377 printk("dmmat32: board detection failed\n");
381 /* board is there, register interrupt */
383 ret
= request_irq(irq
, dmm32at_isr
, 0, thisboard
->name
, dev
);
385 printk("irq conflict\n");
392 * If you can probe the device to determine what device in a series
393 * it is, this is the place to do it. Otherwise, dev->board_ptr
394 * should already be initialized.
396 /* dev->board_ptr = dmm32at_probe(dev); */
399 * Initialize dev->board_name. Note that we can use the "thisboard"
400 * macro now, since we just initialized it in the last line.
402 dev
->board_name
= thisboard
->name
;
405 * Allocate the private structure area. alloc_private() is a
406 * convenient macro defined in comedidev.h.
408 if (alloc_private(dev
, sizeof(struct dmm32at_private
)) < 0)
412 * Allocate the subdevice structures. alloc_subdevice() is a
413 * convenient macro defined in comedidev.h.
415 if (alloc_subdevices(dev
, 3) < 0)
418 s
= dev
->subdevices
+ 0;
419 dev
->read_subdev
= s
;
420 /* analog input subdevice */
421 s
->type
= COMEDI_SUBD_AI
;
422 /* we support single-ended (ground) and differential */
423 s
->subdev_flags
= SDF_READABLE
| SDF_GROUND
| SDF_DIFF
| SDF_CMD_READ
;
424 s
->n_chan
= thisboard
->ai_chans
;
425 s
->maxdata
= (1 << thisboard
->ai_bits
) - 1;
426 s
->range_table
= thisboard
->ai_ranges
;
427 s
->len_chanlist
= 32; /* This is the maximum chanlist length that
428 the board can handle */
429 s
->insn_read
= dmm32at_ai_rinsn
;
430 s
->do_cmd
= dmm32at_ai_cmd
;
431 s
->do_cmdtest
= dmm32at_ai_cmdtest
;
432 s
->cancel
= dmm32at_ai_cancel
;
434 s
= dev
->subdevices
+ 1;
435 /* analog output subdevice */
436 s
->type
= COMEDI_SUBD_AO
;
437 s
->subdev_flags
= SDF_WRITABLE
;
438 s
->n_chan
= thisboard
->ao_chans
;
439 s
->maxdata
= (1 << thisboard
->ao_bits
) - 1;
440 s
->range_table
= thisboard
->ao_ranges
;
441 s
->insn_write
= dmm32at_ao_winsn
;
442 s
->insn_read
= dmm32at_ao_rinsn
;
444 s
= dev
->subdevices
+ 2;
445 /* digital i/o subdevice */
446 if (thisboard
->have_dio
) {
448 /* get access to the DIO regs */
449 dmm_outb(dev
, DMM32AT_CNTRL
, DMM32AT_DIOACC
);
450 /* set the DIO's to the defualt input setting */
451 devpriv
->dio_config
= DMM32AT_DIRA
| DMM32AT_DIRB
|
452 DMM32AT_DIRCL
| DMM32AT_DIRCH
| DMM32AT_DIENABLE
;
453 dmm_outb(dev
, DMM32AT_DIOCONF
, devpriv
->dio_config
);
455 /* set up the subdevice */
456 s
->type
= COMEDI_SUBD_DIO
;
457 s
->subdev_flags
= SDF_READABLE
| SDF_WRITABLE
;
458 s
->n_chan
= thisboard
->dio_chans
;
461 s
->range_table
= &range_digital
;
462 s
->insn_bits
= dmm32at_dio_insn_bits
;
463 s
->insn_config
= dmm32at_dio_insn_config
;
465 s
->type
= COMEDI_SUBD_UNUSED
;
469 printk("comedi%d: dmm32at: attached\n", dev
->minor
);
476 * _detach is called to deconfigure a device. It should deallocate
478 * This function is also called when _attach() fails, so it should be
479 * careful not to release resources that were not necessarily
480 * allocated by _attach(). dev->private and dev->subdevices are
481 * deallocated automatically by the core.
483 static int dmm32at_detach(struct comedi_device
*dev
)
485 printk("comedi%d: dmm32at: remove\n", dev
->minor
);
487 free_irq(dev
->irq
, dev
);
489 release_region(dev
->iobase
, DMM32AT_MEMSIZE
);
495 * "instructions" read/write data in "one-shot" or "software-triggered"
499 static int dmm32at_ai_rinsn(struct comedi_device
*dev
, struct comedi_subdevice
*s
,
500 struct comedi_insn
*insn
, unsigned int *data
)
504 unsigned char status
;
505 unsigned short msb
, lsb
;
509 /* get the channel and range number */
511 chan
= CR_CHAN(insn
->chanspec
) & (s
->n_chan
- 1);
512 range
= CR_RANGE(insn
->chanspec
);
514 /* printk("channel=0x%02x, range=%d\n",chan,range); */
516 /* zero scan and fifo control and reset fifo */
517 dmm_outb(dev
, DMM32AT_FIFOCNTRL
, DMM32AT_FIFORESET
);
519 /* write the ai channel range regs */
520 dmm_outb(dev
, DMM32AT_AILOW
, chan
);
521 dmm_outb(dev
, DMM32AT_AIHIGH
, chan
);
522 /* set the range bits */
523 dmm_outb(dev
, DMM32AT_AICONF
, dmm32at_rangebits
[range
]);
525 /* wait for circuit to settle */
526 for (i
= 0; i
< 40000; i
++) {
527 status
= dmm_inb(dev
, DMM32AT_AIRBACK
);
528 if ((status
& DMM32AT_STATUS
) == 0)
536 /* convert n samples */
537 for (n
= 0; n
< insn
->n
; n
++) {
538 /* trigger conversion */
539 dmm_outb(dev
, DMM32AT_CONV
, 0xff);
540 /* wait for conversion to end */
541 for (i
= 0; i
< 40000; i
++) {
542 status
= dmm_inb(dev
, DMM32AT_AISTAT
);
543 if ((status
& DMM32AT_STATUS
) == 0)
552 lsb
= dmm_inb(dev
, DMM32AT_AILSB
);
553 msb
= dmm_inb(dev
, DMM32AT_AIMSB
);
555 /* invert sign bit to make range unsigned, this is an
556 idiosyncracy of the diamond board, it return
557 conversions as a signed value, i.e. -32768 to
558 32767, flipping the bit and interpreting it as
559 signed gives you a range of 0 to 65535 which is
561 d
= ((msb
^ 0x0080) << 8) + lsb
;
566 /* return the number of samples read/written */
570 static int dmm32at_ai_cmdtest(struct comedi_device
*dev
, struct comedi_subdevice
*s
,
571 struct comedi_cmd
*cmd
)
575 int start_chan
, gain
, i
;
577 /* printk("dmmat32 in command test\n"); */
579 /* cmdtest tests a particular command to see if it is valid.
580 * Using the cmdtest ioctl, a user can create a valid cmd
581 * and then have it executes by the cmd ioctl.
583 * cmdtest returns 1,2,3,4 or 0, depending on which tests
584 * the command passes. */
586 /* step 1: make sure trigger sources are trivially valid */
588 tmp
= cmd
->start_src
;
589 cmd
->start_src
&= TRIG_NOW
;
590 if (!cmd
->start_src
|| tmp
!= cmd
->start_src
)
593 tmp
= cmd
->scan_begin_src
;
594 cmd
->scan_begin_src
&= TRIG_TIMER
/*| TRIG_EXT */ ;
595 if (!cmd
->scan_begin_src
|| tmp
!= cmd
->scan_begin_src
)
598 tmp
= cmd
->convert_src
;
599 cmd
->convert_src
&= TRIG_TIMER
/*| TRIG_EXT */ ;
600 if (!cmd
->convert_src
|| tmp
!= cmd
->convert_src
)
603 tmp
= cmd
->scan_end_src
;
604 cmd
->scan_end_src
&= TRIG_COUNT
;
605 if (!cmd
->scan_end_src
|| tmp
!= cmd
->scan_end_src
)
609 cmd
->stop_src
&= TRIG_COUNT
| TRIG_NONE
;
610 if (!cmd
->stop_src
|| tmp
!= cmd
->stop_src
)
616 /* step 2: make sure trigger sources are unique and mutually compatible */
618 /* note that mutual compatiblity is not an issue here */
619 if (cmd
->scan_begin_src
!= TRIG_TIMER
&&
620 cmd
->scan_begin_src
!= TRIG_EXT
)
622 if (cmd
->convert_src
!= TRIG_TIMER
&& cmd
->convert_src
!= TRIG_EXT
)
624 if (cmd
->stop_src
!= TRIG_COUNT
&& cmd
->stop_src
!= TRIG_NONE
)
630 /* step 3: make sure arguments are trivially compatible */
632 if (cmd
->start_arg
!= 0) {
636 #define MAX_SCAN_SPEED 1000000 /* in nanoseconds */
637 #define MIN_SCAN_SPEED 1000000000 /* in nanoseconds */
639 if (cmd
->scan_begin_src
== TRIG_TIMER
) {
640 if (cmd
->scan_begin_arg
< MAX_SCAN_SPEED
) {
641 cmd
->scan_begin_arg
= MAX_SCAN_SPEED
;
644 if (cmd
->scan_begin_arg
> MIN_SCAN_SPEED
) {
645 cmd
->scan_begin_arg
= MIN_SCAN_SPEED
;
649 /* external trigger */
650 /* should be level/edge, hi/lo specification here */
651 /* should specify multiple external triggers */
652 if (cmd
->scan_begin_arg
> 9) {
653 cmd
->scan_begin_arg
= 9;
657 if (cmd
->convert_src
== TRIG_TIMER
) {
658 if (cmd
->convert_arg
>= 17500)
659 cmd
->convert_arg
= 20000;
660 else if (cmd
->convert_arg
>= 12500)
661 cmd
->convert_arg
= 15000;
662 else if (cmd
->convert_arg
>= 7500)
663 cmd
->convert_arg
= 10000;
665 cmd
->convert_arg
= 5000;
668 /* external trigger */
670 if (cmd
->convert_arg
> 9) {
671 cmd
->convert_arg
= 9;
676 if (cmd
->scan_end_arg
!= cmd
->chanlist_len
) {
677 cmd
->scan_end_arg
= cmd
->chanlist_len
;
680 if (cmd
->stop_src
== TRIG_COUNT
) {
681 if (cmd
->stop_arg
> 0xfffffff0) {
682 cmd
->stop_arg
= 0xfffffff0;
685 if (cmd
->stop_arg
== 0) {
691 if (cmd
->stop_arg
!= 0) {
700 /* step 4: fix up any arguments */
702 if (cmd
->scan_begin_src
== TRIG_TIMER
) {
703 tmp
= cmd
->scan_begin_arg
;
704 dmm32at_ns_to_timer(&cmd
->scan_begin_arg
,
705 cmd
->flags
& TRIG_ROUND_MASK
);
706 if (tmp
!= cmd
->scan_begin_arg
)
709 if (cmd
->convert_src
== TRIG_TIMER
) {
710 tmp
= cmd
->convert_arg
;
711 dmm32at_ns_to_timer(&cmd
->convert_arg
,
712 cmd
->flags
& TRIG_ROUND_MASK
);
713 if (tmp
!= cmd
->convert_arg
)
715 if (cmd
->scan_begin_src
== TRIG_TIMER
&&
716 cmd
->scan_begin_arg
<
717 cmd
->convert_arg
* cmd
->scan_end_arg
) {
718 cmd
->scan_begin_arg
=
719 cmd
->convert_arg
* cmd
->scan_end_arg
;
727 /* step 5 check the channel list, the channel list for this
728 board must be consecutive and gains must be the same */
731 gain
= CR_RANGE(cmd
->chanlist
[0]);
732 start_chan
= CR_CHAN(cmd
->chanlist
[0]);
733 for (i
= 1; i
< cmd
->chanlist_len
; i
++) {
734 if (CR_CHAN(cmd
->chanlist
[i
]) !=
735 (start_chan
+ i
) % s
->n_chan
) {
737 "entries in chanlist must be consecutive channels, counting upwards\n");
740 if (CR_RANGE(cmd
->chanlist
[i
]) != gain
) {
742 "entries in chanlist must all have the same gain\n");
754 static int dmm32at_ai_cmd(struct comedi_device
*dev
, struct comedi_subdevice
*s
)
756 struct comedi_cmd
*cmd
= &s
->async
->cmd
;
758 unsigned char chanlo
, chanhi
, status
;
763 /* get the channel list and range */
764 chanlo
= CR_CHAN(cmd
->chanlist
[0]) & (s
->n_chan
- 1);
765 chanhi
= chanlo
+ cmd
->chanlist_len
- 1;
766 if (chanhi
>= s
->n_chan
)
768 range
= CR_RANGE(cmd
->chanlist
[0]);
771 dmm_outb(dev
, DMM32AT_FIFOCNTRL
, DMM32AT_FIFORESET
);
773 /* set scan enable */
774 dmm_outb(dev
, DMM32AT_FIFOCNTRL
, DMM32AT_SCANENABLE
);
776 /* write the ai channel range regs */
777 dmm_outb(dev
, DMM32AT_AILOW
, chanlo
);
778 dmm_outb(dev
, DMM32AT_AIHIGH
, chanhi
);
780 /* set the range bits */
781 dmm_outb(dev
, DMM32AT_AICONF
, dmm32at_rangebits
[range
]);
783 /* reset the interrupt just in case */
784 dmm_outb(dev
, DMM32AT_CNTRL
, DMM32AT_INTRESET
);
786 if (cmd
->stop_src
== TRIG_COUNT
)
787 devpriv
->ai_scans_left
= cmd
->stop_arg
;
788 else { /* TRIG_NONE */
789 devpriv
->ai_scans_left
= 0xffffffff; /* indicates TRIG_NONE to isr */
792 /* wait for circuit to settle */
793 for (i
= 0; i
< 40000; i
++) {
794 status
= dmm_inb(dev
, DMM32AT_AIRBACK
);
795 if ((status
& DMM32AT_STATUS
) == 0)
803 if (devpriv
->ai_scans_left
> 1) {
804 /* start the clock and enable the interrupts */
805 dmm32at_setaitimer(dev
, cmd
->scan_begin_arg
);
807 /* start the interrups and initiate a single scan */
808 dmm_outb(dev
, DMM32AT_INTCLOCK
, DMM32AT_ADINT
);
809 dmm_outb(dev
, DMM32AT_CONV
, 0xff);
812 /* printk("dmmat32 in command\n"); */
814 /* for(i=0;i<cmd->chanlist_len;i++) */
815 /* comedi_buf_put(s->async,i*100); */
817 /* s->async->events |= COMEDI_CB_EOA; */
818 /* comedi_event(dev, s); */
824 static int dmm32at_ai_cancel(struct comedi_device
*dev
, struct comedi_subdevice
*s
)
826 devpriv
->ai_scans_left
= 1;
830 static irqreturn_t
dmm32at_isr(int irq
, void *d
)
832 unsigned char intstat
;
834 unsigned short msb
, lsb
;
836 struct comedi_device
*dev
= d
;
838 if (!dev
->attached
) {
839 comedi_error(dev
, "spurious interrupt");
843 intstat
= dmm_inb(dev
, DMM32AT_INTCLOCK
);
845 if (intstat
& DMM32AT_ADINT
) {
846 struct comedi_subdevice
*s
= dev
->read_subdev
;
847 struct comedi_cmd
*cmd
= &s
->async
->cmd
;
849 for (i
= 0; i
< cmd
->chanlist_len
; i
++) {
851 lsb
= dmm_inb(dev
, DMM32AT_AILSB
);
852 msb
= dmm_inb(dev
, DMM32AT_AIMSB
);
854 /* invert sign bit to make range unsigned */
855 samp
= ((msb
^ 0x0080) << 8) + lsb
;
856 comedi_buf_put(s
->async
, samp
);
859 if (devpriv
->ai_scans_left
!= 0xffffffff) { /* TRIG_COUNT */
860 devpriv
->ai_scans_left
--;
861 if (devpriv
->ai_scans_left
== 0) {
862 /* disable further interrupts and clocks */
863 dmm_outb(dev
, DMM32AT_INTCLOCK
, 0x0);
864 /* set the buffer to be flushed with an EOF */
865 s
->async
->events
|= COMEDI_CB_EOA
;
869 /* flush the buffer */
870 comedi_event(dev
, s
);
873 /* reset the interrupt */
874 dmm_outb(dev
, DMM32AT_CNTRL
, DMM32AT_INTRESET
);
878 /* This function doesn't require a particular form, this is just
879 * what happens to be used in some of the drivers. It should
880 * convert ns nanoseconds to a counter value suitable for programming
881 * the device. Also, it should adjust ns so that it cooresponds to
882 * the actual time that the device will use. */
883 static int dmm32at_ns_to_timer(unsigned int *ns
, int round
)
886 /* if your timing is done through two cascaded timers, the
887 * i8253_cascade_ns_to_timer() function in 8253.h can be
888 * very helpful. There are also i8254_load() and i8254_mm_load()
889 * which can be used to load values into the ubiquitous 8254 counters
895 static int dmm32at_ao_winsn(struct comedi_device
*dev
, struct comedi_subdevice
*s
,
896 struct comedi_insn
*insn
, unsigned int *data
)
899 int chan
= CR_CHAN(insn
->chanspec
);
900 unsigned char hi
, lo
, status
;
902 /* Writing a list of values to an AO channel is probably not
903 * very useful, but that's how the interface is defined. */
904 for (i
= 0; i
< insn
->n
; i
++) {
906 devpriv
->ao_readback
[chan
] = data
[i
];
908 /* get the low byte */
909 lo
= data
[i
] & 0x00ff;
910 /* high byte also contains channel number */
911 hi
= (data
[i
] >> 8) + chan
* (1 << 6);
912 /* printk("writing 0x%02x 0x%02x\n",hi,lo); */
913 /* write the low and high values to the board */
914 dmm_outb(dev
, DMM32AT_DACLSB
, lo
);
915 dmm_outb(dev
, DMM32AT_DACMSB
, hi
);
917 /* wait for circuit to settle */
918 for (i
= 0; i
< 40000; i
++) {
919 status
= dmm_inb(dev
, DMM32AT_DACSTAT
);
920 if ((status
& DMM32AT_DACBUSY
) == 0)
927 /* dummy read to update trigger the output */
928 status
= dmm_inb(dev
, DMM32AT_DACMSB
);
932 /* return the number of samples read/written */
936 /* AO subdevices should have a read insn as well as a write insn.
937 * Usually this means copying a value stored in devpriv. */
938 static int dmm32at_ao_rinsn(struct comedi_device
*dev
, struct comedi_subdevice
*s
,
939 struct comedi_insn
*insn
, unsigned int *data
)
942 int chan
= CR_CHAN(insn
->chanspec
);
944 for (i
= 0; i
< insn
->n
; i
++)
945 data
[i
] = devpriv
->ao_readback
[chan
];
950 /* DIO devices are slightly special. Although it is possible to
951 * implement the insn_read/insn_write interface, it is much more
952 * useful to applications if you implement the insn_bits interface.
953 * This allows packed reading/writing of the DIO channels. The
954 * comedi core can convert between insn_bits and insn_read/write */
955 static int dmm32at_dio_insn_bits(struct comedi_device
*dev
, struct comedi_subdevice
*s
,
956 struct comedi_insn
*insn
, unsigned int *data
)
958 unsigned char diobits
;
963 /* The insn data is a mask in data[0] and the new data
964 * in data[1], each channel cooresponding to a bit. */
966 s
->state
&= ~data
[0];
967 s
->state
|= data
[0] & data
[1];
968 /* Write out the new digital output lines */
969 /* outw(s->state,dev->iobase + DMM32AT_DIO); */
972 /* get access to the DIO regs */
973 dmm_outb(dev
, DMM32AT_CNTRL
, DMM32AT_DIOACC
);
975 /* if either part of dio is set for output */
976 if (((devpriv
->dio_config
& DMM32AT_DIRCL
) == 0) ||
977 ((devpriv
->dio_config
& DMM32AT_DIRCH
) == 0)) {
978 diobits
= (s
->state
& 0x00ff0000) >> 16;
979 dmm_outb(dev
, DMM32AT_DIOC
, diobits
);
981 if ((devpriv
->dio_config
& DMM32AT_DIRB
) == 0) {
982 diobits
= (s
->state
& 0x0000ff00) >> 8;
983 dmm_outb(dev
, DMM32AT_DIOB
, diobits
);
985 if ((devpriv
->dio_config
& DMM32AT_DIRA
) == 0) {
986 diobits
= (s
->state
& 0x000000ff);
987 dmm_outb(dev
, DMM32AT_DIOA
, diobits
);
990 /* now read the state back in */
991 s
->state
= dmm_inb(dev
, DMM32AT_DIOC
);
993 s
->state
|= dmm_inb(dev
, DMM32AT_DIOB
);
995 s
->state
|= dmm_inb(dev
, DMM32AT_DIOA
);
998 /* on return, data[1] contains the value of the digital
999 * input and output lines. */
1000 /* data[1]=inw(dev->iobase + DMM32AT_DIO); */
1001 /* or we could just return the software copy of the output values if
1002 * it was a purely digital output subdevice */
1003 /* data[1]=s->state; */
1008 static int dmm32at_dio_insn_config(struct comedi_device
*dev
, struct comedi_subdevice
*s
,
1009 struct comedi_insn
*insn
, unsigned int *data
)
1011 unsigned char chanbit
;
1012 int chan
= CR_CHAN(insn
->chanspec
);
1018 chanbit
= DMM32AT_DIRA
;
1020 chanbit
= DMM32AT_DIRB
;
1022 chanbit
= DMM32AT_DIRCL
;
1024 chanbit
= DMM32AT_DIRCH
;
1026 /* The input or output configuration of each digital line is
1027 * configured by a special insn_config instruction. chanspec
1028 * contains the channel to be changed, and data[0] contains the
1029 * value COMEDI_INPUT or COMEDI_OUTPUT. */
1031 /* if output clear the bit, otherwise set it */
1032 if (data
[0] == COMEDI_OUTPUT
) {
1033 devpriv
->dio_config
&= ~chanbit
;
1035 devpriv
->dio_config
|= chanbit
;
1037 /* get access to the DIO regs */
1038 dmm_outb(dev
, DMM32AT_CNTRL
, DMM32AT_DIOACC
);
1039 /* set the DIO's to the new configuration setting */
1040 dmm_outb(dev
, DMM32AT_DIOCONF
, devpriv
->dio_config
);
1045 void dmm32at_setaitimer(struct comedi_device
*dev
, unsigned int nansec
)
1047 unsigned char lo1
, lo2
, hi2
;
1048 unsigned short both2
;
1050 /* based on 10mhz clock */
1052 both2
= nansec
/ 20000;
1053 hi2
= (both2
& 0xff00) >> 8;
1054 lo2
= both2
& 0x00ff;
1056 /* set the counter frequency to 10mhz */
1057 dmm_outb(dev
, DMM32AT_CNTRDIO
, 0);
1059 /* get access to the clock regs */
1060 dmm_outb(dev
, DMM32AT_CNTRL
, DMM32AT_CLKACC
);
1062 /* write the counter 1 control word and low byte to counter */
1063 dmm_outb(dev
, DMM32AT_CLKCT
, DMM32AT_CLKCT1
);
1064 dmm_outb(dev
, DMM32AT_CLK1
, lo1
);
1066 /* write the counter 2 control word and low byte then to counter */
1067 dmm_outb(dev
, DMM32AT_CLKCT
, DMM32AT_CLKCT2
);
1068 dmm_outb(dev
, DMM32AT_CLK2
, lo2
);
1069 dmm_outb(dev
, DMM32AT_CLK2
, hi2
);
1071 /* enable the ai conversion interrupt and the clock to start scans */
1072 dmm_outb(dev
, DMM32AT_INTCLOCK
, DMM32AT_ADINT
| DMM32AT_CLKSEL
);
1077 * A convenient macro that defines init_module() and cleanup_module(),
1080 COMEDI_INITCLEANUP(driver_dmm32at
);