2 comedi/drivers/pcmuio.c
3 Driver for Winsystems PC-104 based 48-channel and 96-channel DIO boards.
5 COMEDI - Linux Control and Measurement Device Interface
6 Copyright (C) 2006 Calin A. Culianu <calin@ajvar.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.
24 Description: A driver for the PCM-UIO48A and PCM-UIO96A boards from Winsystems.
25 Devices: [Winsystems] PCM-UIO48A (pcmuio48), PCM-UIO96A (pcmuio96)
26 Author: Calin Culianu <calin@ajvar.org>
27 Updated: Fri, 13 Jan 2006 12:01:01 -0500
30 A driver for the relatively straightforward-to-program PCM-UIO48A and
31 PCM-UIO96A boards from Winsystems. These boards use either one or two
32 (in the 96-DIO version) WS16C48 ASIC HighDensity I/O Chips (HDIO).
33 This chip is interesting in that each I/O line is individually
34 programmable for INPUT or OUTPUT (thus comedi_dio_config can be done
35 on a per-channel basis). Also, each chip supports edge-triggered
36 interrupts for the first 24 I/O lines. Of course, since the
37 96-channel version of the board has two ASICs, it can detect polarity
38 changes on up to 48 I/O lines. Since this is essentially an (non-PnP)
39 ISA board, I/O Address and IRQ selection are done through jumpers on
40 the board. You need to pass that information to this driver as the
41 first and second comedi_config option, respectively. Note that the
42 48-channel version uses 16 bytes of IO memory and the 96-channel
43 version uses 32-bytes (in case you are worried about conflicts). The
44 48-channel board is split into two 24-channel comedi subdevices.
45 The 96-channel board is split into 4 24-channel DIO subdevices.
47 Note that IRQ support has been added, but it is untested.
49 To use edge-detection IRQ support, pass the IRQs of both ASICS
50 (for the 96 channel version) or just 1 ASIC (for 48-channel version).
51 Then, use use comedi_commands with TRIG_NOW.
52 Your callback will be called each time an edge is triggered, and the data
53 values will be two sample_t's, which should be concatenated to form one
54 32-bit unsigned int. This value is the mask of channels that had
55 edges detected from your channel list. Note that the bits positions
56 in the mask correspond to positions in your chanlist when you specified
57 the command and *not* channel id's!
59 To set the polarity of the edge-detection interrupts pass a nonzero value for
60 either CR_RANGE or CR_AREF for edge-up polarity, or a zero value for both
61 CR_RANGE and CR_AREF if you want edge-down polarity.
63 In the 48-channel version:
65 On subdev 0, the first 24 channels channels are edge-detect channels.
67 In the 96-channel board you have the collowing channels that can do edge detection:
69 subdev 0, channels 0-24 (first 24 channels of 1st ASIC)
70 subdev 2, channels 0-24 (first 24 channels of 2nd ASIC)
72 Configuration Options:
73 [0] - I/O port base address
74 [1] - IRQ (for first ASIC, or first 24 channels)
75 [2] - IRQ for second ASIC (pcmuio96 only - IRQ for chans 48-72 .. can be the same as first irq!)
78 #include <linux/interrupt.h>
79 #include "../comedidev.h"
80 #include "pcm_common.h"
82 #include <linux/pci.h> /* for PCI devices */
84 #define CHANS_PER_PORT 8
85 #define PORTS_PER_ASIC 6
86 #define INTR_PORTS_PER_ASIC 3
87 #define MAX_CHANS_PER_SUBDEV 24 /* number of channels per comedi subdevice */
88 #define PORTS_PER_SUBDEV (MAX_CHANS_PER_SUBDEV/CHANS_PER_PORT)
89 #define CHANS_PER_ASIC (CHANS_PER_PORT*PORTS_PER_ASIC)
90 #define INTR_CHANS_PER_ASIC 24
91 #define INTR_PORTS_PER_SUBDEV (INTR_CHANS_PER_ASIC/CHANS_PER_PORT)
92 #define MAX_DIO_CHANS (PORTS_PER_ASIC*2*CHANS_PER_PORT)
93 #define MAX_ASICS (MAX_DIO_CHANS/CHANS_PER_ASIC)
94 #define SDEV_NO ((int)(s - dev->subdevices))
95 #define CALC_N_SUBDEVS(nchans) ((nchans)/MAX_CHANS_PER_SUBDEV + (!!((nchans)%MAX_CHANS_PER_SUBDEV)) /*+ (nchans > INTR_CHANS_PER_ASIC ? 2 : 1)*/)
97 #define ASIC_IOSIZE (0x10)
98 #define PCMUIO48_IOSIZE ASIC_IOSIZE
99 #define PCMUIO96_IOSIZE (ASIC_IOSIZE*2)
101 /* Some offsets - these are all in the 16byte IO memory offset from
102 the base address. Note that there is a paging scheme to swap out
103 offsets 0x8-0xA using the PAGELOCK register. See the table below.
105 Register(s) Pages R/W? Description
106 --------------------------------------------------------------
107 REG_PORTx All R/W Read/Write/Configure IO
108 REG_INT_PENDING All ReadOnly Quickly see which INT_IDx has int.
109 REG_PAGELOCK All WriteOnly Select a page
110 REG_POLx Pg. 1 only WriteOnly Select edge-detection polarity
111 REG_ENABx Pg. 2 only WriteOnly Enable/Disable edge-detect. int.
112 REG_INT_IDx Pg. 3 only R/W See which ports/bits have ints.
114 #define REG_PORT0 0x0
115 #define REG_PORT1 0x1
116 #define REG_PORT2 0x2
117 #define REG_PORT3 0x3
118 #define REG_PORT4 0x4
119 #define REG_PORT5 0x5
120 #define REG_INT_PENDING 0x6
121 #define REG_PAGELOCK 0x7 /* page selector register, upper 2 bits select a page
122 and bits 0-5 are used to 'lock down' a particular
123 port above to make it readonly. */
127 #define REG_ENAB0 0x8
128 #define REG_ENAB1 0x9
129 #define REG_ENAB2 0xA
130 #define REG_INT_ID0 0x8
131 #define REG_INT_ID1 0x9
132 #define REG_INT_ID2 0xA
134 #define NUM_PAGED_REGS 3
136 #define FIRST_PAGED_REG 0x8
137 #define REG_PAGE_BITOFFSET 6
138 #define REG_LOCK_BITOFFSET 0
139 #define REG_PAGE_MASK (~((0x1<<REG_PAGE_BITOFFSET)-1))
140 #define REG_LOCK_MASK ~(REG_PAGE_MASK)
143 #define PAGE_INT_ID 3
146 * Board descriptions for two imaginary boards. Describing the
147 * boards in this way is optional, and completely driver-dependent.
148 * Some drivers use arrays such as this, other do not.
150 struct pcmuio_board {
153 const int num_channels_per_port;
157 static const struct pcmuio_board pcmuio_boards[] = {
171 * Useful for shorthand access to the particular board structure
173 #define thisboard ((const struct pcmuio_board *)dev->board_ptr)
175 /* this structure is for data unique to this subdevice. */
176 struct pcmuio_subdev_private {
177 /* mapping of halfwords (bytes) in port/chanarray to iobase */
178 unsigned long iobases[PORTS_PER_SUBDEV];
180 /* The below is only used for intr subdevices */
182 int asic; /* if non-negative, this subdev has an interrupt asic */
183 int first_chan; /* if nonnegative, the first channel id for
185 int num_asic_chans; /* the number of asic channels in this subdev
186 that have interrutps */
187 int asic_chan; /* if nonnegative, the first channel id with
188 respect to the asic that has interrupts */
189 int enabled_mask; /* subdev-relative channel mask for channels
190 we are interested in */
198 /* this structure is for data unique to this hardware driver. If
199 several hardware drivers keep similar information in this structure,
200 feel free to suggest moving the variable to the struct comedi_device struct. */
201 struct pcmuio_private {
203 unsigned char pagelock; /* current page and lock */
204 unsigned char pol[NUM_PAGED_REGS]; /* shadow of POLx registers */
205 unsigned char enab[NUM_PAGED_REGS]; /* shadow of ENABx registers */
207 unsigned long iobase;
211 struct pcmuio_subdev_private *sprivs;
215 * most drivers define the following macro to make it easy to
216 * access the private structure.
218 #define devpriv ((struct pcmuio_private *)dev->private)
219 #define subpriv ((struct pcmuio_subdev_private *)s->private)
221 * The struct comedi_driver structure tells the Comedi core module
222 * which functions to call to configure/deconfigure (attach/detach)
223 * the board, and also about the kernel module that contains
226 static int pcmuio_attach(struct comedi_device *dev, struct comedi_devconfig *it);
227 static int pcmuio_detach(struct comedi_device *dev);
229 static struct comedi_driver driver = {
230 .driver_name = "pcmuio",
231 .module = THIS_MODULE,
232 .attach = pcmuio_attach,
233 .detach = pcmuio_detach,
234 /* It is not necessary to implement the following members if you are
235 * writing a driver for a ISA PnP or PCI card */
236 /* Most drivers will support multiple types of boards by
237 * having an array of board structures. These were defined
238 * in pcmuio_boards[] above. Note that the element 'name'
239 * was first in the structure -- Comedi uses this fact to
240 * extract the name of the board without knowing any details
241 * about the structure except for its length.
242 * When a device is attached (by comedi_config), the name
243 * of the device is given to Comedi, and Comedi tries to
244 * match it by going through the list of board names. If
245 * there is a match, the address of the pointer is put
246 * into dev->board_ptr and driver->attach() is called.
248 * Note that these are not necessary if you can determine
249 * the type of board in software. ISA PnP, PCI, and PCMCIA
250 * devices are such boards.
252 .board_name = &pcmuio_boards[0].name,
253 .offset = sizeof(struct pcmuio_board),
254 .num_names = ARRAY_SIZE(pcmuio_boards),
257 static int pcmuio_dio_insn_bits(struct comedi_device *dev, struct comedi_subdevice *s,
258 struct comedi_insn *insn, unsigned int *data);
259 static int pcmuio_dio_insn_config(struct comedi_device *dev, struct comedi_subdevice *s,
260 struct comedi_insn *insn, unsigned int *data);
262 static irqreturn_t interrupt_pcmuio(int irq, void *d);
263 static void pcmuio_stop_intr(struct comedi_device *, struct comedi_subdevice *);
264 static int pcmuio_cancel(struct comedi_device *dev, struct comedi_subdevice *s);
265 static int pcmuio_cmd(struct comedi_device *dev, struct comedi_subdevice *s);
266 static int pcmuio_cmdtest(struct comedi_device *dev, struct comedi_subdevice *s,
267 struct comedi_cmd *cmd);
269 /* some helper functions to deal with specifics of this device's registers */
270 static void init_asics(struct comedi_device *dev); /* sets up/clears ASIC chips to defaults */
271 static void switch_page(struct comedi_device *dev, int asic, int page);
273 static void lock_port(struct comedi_device *dev, int asic, int port);
274 static void unlock_port(struct comedi_device *dev, int asic, int port);
278 * Attach is called by the Comedi core to configure the driver
279 * for a particular board. If you specified a board_name array
280 * in the driver structure, dev->board_ptr contains that
283 static int pcmuio_attach(struct comedi_device *dev, struct comedi_devconfig *it)
285 struct comedi_subdevice *s;
286 int sdev_no, chans_left, n_subdevs, port, asic, thisasic_chanct = 0;
287 unsigned long iobase;
288 unsigned int irq[MAX_ASICS];
290 iobase = it->options[0];
291 irq[0] = it->options[1];
292 irq[1] = it->options[2];
294 printk("comedi%d: %s: io: %lx ", dev->minor, driver.driver_name,
297 dev->iobase = iobase;
299 if (!iobase || !request_region(iobase,
300 thisboard->num_asics * ASIC_IOSIZE,
301 driver.driver_name)) {
302 printk("I/O port conflict\n");
307 * Initialize dev->board_name. Note that we can use the "thisboard"
308 * macro now, since we just initialized it in the last line.
310 dev->board_name = thisboard->name;
313 * Allocate the private structure area. alloc_private() is a
314 * convenient macro defined in comedidev.h.
316 if (alloc_private(dev, sizeof(struct pcmuio_private)) < 0) {
317 printk("cannot allocate private data structure\n");
321 for (asic = 0; asic < MAX_ASICS; ++asic) {
322 devpriv->asics[asic].num = asic;
323 devpriv->asics[asic].iobase = dev->iobase + asic * ASIC_IOSIZE;
324 devpriv->asics[asic].irq = 0; /* this gets actually set at the end of
325 this function when we
327 spin_lock_init(&devpriv->asics[asic].spinlock);
330 chans_left = CHANS_PER_ASIC * thisboard->num_asics;
331 n_subdevs = CALC_N_SUBDEVS(chans_left);
333 kcalloc(n_subdevs, sizeof(struct pcmuio_subdev_private), GFP_KERNEL);
334 if (!devpriv->sprivs) {
335 printk("cannot allocate subdevice private data structures\n");
339 * Allocate the subdevice structures. alloc_subdevice() is a
340 * convenient macro defined in comedidev.h.
342 * Allocate 2 subdevs (32 + 16 DIO lines) or 3 32 DIO subdevs for the
343 * 96-channel version of the board.
345 if (alloc_subdevices(dev, n_subdevs) < 0) {
346 printk("cannot allocate subdevice data structures\n");
352 for (sdev_no = 0; sdev_no < (int)dev->n_subdevices; ++sdev_no) {
355 s = dev->subdevices + sdev_no;
356 s->private = devpriv->sprivs + sdev_no;
358 s->range_table = &range_digital;
359 s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
360 s->type = COMEDI_SUBD_DIO;
361 s->insn_bits = pcmuio_dio_insn_bits;
362 s->insn_config = pcmuio_dio_insn_config;
363 s->n_chan = min(chans_left, MAX_CHANS_PER_SUBDEV);
364 subpriv->intr.asic = -1;
365 subpriv->intr.first_chan = -1;
366 subpriv->intr.asic_chan = -1;
367 subpriv->intr.num_asic_chans = -1;
368 subpriv->intr.active = 0;
371 /* save the ioport address for each 'port' of 8 channels in the
373 for (byte_no = 0; byte_no < PORTS_PER_SUBDEV; ++byte_no, ++port) {
374 if (port >= PORTS_PER_ASIC) {
379 subpriv->iobases[byte_no] =
380 devpriv->asics[asic].iobase + port;
382 if (thisasic_chanct <
383 CHANS_PER_PORT * INTR_PORTS_PER_ASIC
384 && subpriv->intr.asic < 0) {
385 /* this is an interrupt subdevice, so setup the struct */
386 subpriv->intr.asic = asic;
387 subpriv->intr.active = 0;
388 subpriv->intr.stop_count = 0;
389 subpriv->intr.first_chan = byte_no * 8;
390 subpriv->intr.asic_chan = thisasic_chanct;
391 subpriv->intr.num_asic_chans =
392 s->n_chan - subpriv->intr.first_chan;
393 dev->read_subdev = s;
394 s->subdev_flags |= SDF_CMD_READ;
395 s->cancel = pcmuio_cancel;
396 s->do_cmd = pcmuio_cmd;
397 s->do_cmdtest = pcmuio_cmdtest;
398 s->len_chanlist = subpriv->intr.num_asic_chans;
400 thisasic_chanct += CHANS_PER_PORT;
402 spin_lock_init(&subpriv->intr.spinlock);
404 chans_left -= s->n_chan;
407 asic = 0; /* reset the asic to our first asic, to do intr subdevs */
413 init_asics(dev); /* clear out all the registers, basically */
415 for (asic = 0; irq[0] && asic < MAX_ASICS; ++asic) {
417 && request_irq(irq[asic], interrupt_pcmuio,
418 IRQF_SHARED, thisboard->name, dev)) {
420 /* unroll the allocated irqs.. */
421 for (i = asic - 1; i >= 0; --i) {
422 free_irq(irq[i], dev);
423 devpriv->asics[i].irq = irq[i] = 0;
427 devpriv->asics[asic].irq = irq[asic];
430 dev->irq = irq[0]; /* grr.. wish comedi dev struct supported multiple
434 printk("irq: %u ", irq[0]);
435 if (irq[1] && thisboard->num_asics == 2)
436 printk("second ASIC irq: %u ", irq[1]);
438 printk("(IRQ mode disabled) ");
441 printk("attached\n");
447 * _detach is called to deconfigure a device. It should deallocate
449 * This function is also called when _attach() fails, so it should be
450 * careful not to release resources that were not necessarily
451 * allocated by _attach(). dev->private and dev->subdevices are
452 * deallocated automatically by the core.
454 static int pcmuio_detach(struct comedi_device *dev)
458 printk("comedi%d: %s: remove\n", dev->minor, driver.driver_name);
460 release_region(dev->iobase, ASIC_IOSIZE * thisboard->num_asics);
462 for (i = 0; i < MAX_ASICS; ++i) {
463 if (devpriv->asics[i].irq)
464 free_irq(devpriv->asics[i].irq, dev);
467 if (devpriv && devpriv->sprivs)
468 kfree(devpriv->sprivs);
473 /* DIO devices are slightly special. Although it is possible to
474 * implement the insn_read/insn_write interface, it is much more
475 * useful to applications if you implement the insn_bits interface.
476 * This allows packed reading/writing of the DIO channels. The
477 * comedi core can convert between insn_bits and insn_read/write */
478 static int pcmuio_dio_insn_bits(struct comedi_device *dev, struct comedi_subdevice *s,
479 struct comedi_insn *insn, unsigned int *data)
486 reading a 0 means this channel was high
487 writine a 0 sets the channel high
488 reading a 1 means this channel was low
489 writing a 1 means set this channel low
491 Therefore everything is always inverted. */
493 /* The insn data is a mask in data[0] and the new data
494 * in data[1], each channel cooresponding to a bit. */
496 #ifdef DAMMIT_ITS_BROKEN
498 printk("write mask: %08x data: %08x\n", data[0], data[1]);
503 for (byte_no = 0; byte_no < s->n_chan / CHANS_PER_PORT; ++byte_no) {
504 /* address of 8-bit port */
505 unsigned long ioaddr = subpriv->iobases[byte_no],
506 /* bit offset of port in 32-bit doubleword */
507 offset = byte_no * 8;
508 /* this 8-bit port's data */
509 unsigned char byte = 0,
510 /* The write mask for this port (if any) */
511 write_mask_byte = (data[0] >> offset) & 0xff,
512 /* The data byte for this port */
513 data_byte = (data[1] >> offset) & 0xff;
515 byte = inb(ioaddr); /* read all 8-bits for this port */
517 #ifdef DAMMIT_ITS_BROKEN
519 printk("byte %d wmb %02x db %02x offset %02d io %04x, data_in %02x ", byte_no, (unsigned)write_mask_byte, (unsigned)data_byte, offset, ioaddr, (unsigned)byte);
522 if (write_mask_byte) {
523 /* this byte has some write_bits -- so set the output lines */
524 byte &= ~write_mask_byte; /* clear bits for write mask */
525 byte |= ~data_byte & write_mask_byte; /* set to inverted data_byte */
526 /* Write out the new digital output state */
529 #ifdef DAMMIT_ITS_BROKEN
531 printk("data_out_byte %02x\n", (unsigned)byte);
533 /* save the digital input lines for this byte.. */
534 s->state |= ((unsigned int)byte) << offset;
537 /* now return the DIO lines to data[1] - note they came inverted! */
540 #ifdef DAMMIT_ITS_BROKEN
542 printk("s->state %08x data_out %08x\n", s->state, data[1]);
548 /* The input or output configuration of each digital line is
549 * configured by a special insn_config instruction. chanspec
550 * contains the channel to be changed, and data[0] contains the
551 * value COMEDI_INPUT or COMEDI_OUTPUT. */
552 static int pcmuio_dio_insn_config(struct comedi_device *dev, struct comedi_subdevice *s,
553 struct comedi_insn *insn, unsigned int *data)
555 int chan = CR_CHAN(insn->chanspec), byte_no = chan / 8, bit_no =
557 unsigned long ioaddr;
560 /* Compute ioaddr for this channel */
561 ioaddr = subpriv->iobases[byte_no];
564 writing a 0 an IO channel's bit sets the channel to INPUT
565 and pulls the line high as well
567 writing a 1 to an IO channel's bit pulls the line low
569 All channels are implicitly always in OUTPUT mode -- but when
570 they are high they can be considered to be in INPUT mode..
572 Thus, we only force channels low if the config request was INPUT,
573 otherwise we do nothing to the hardware. */
576 case INSN_CONFIG_DIO_OUTPUT:
577 /* save to io_bits -- don't actually do anything since
578 all input channels are also output channels... */
579 s->io_bits |= 1 << chan;
581 case INSN_CONFIG_DIO_INPUT:
582 /* write a 0 to the actual register representing the channel
583 to set it to 'input'. 0 means "float high". */
585 byte &= ~(1 << bit_no);
586 /**< set input channel to '0' */
588 /* write out byte -- this is the only time we actually affect the
589 hardware as all channels are implicitly output -- but input
590 channels are set to float-high */
593 /* save to io_bits */
594 s->io_bits &= ~(1 << chan);
597 case INSN_CONFIG_DIO_QUERY:
598 /* retreive from shadow register */
601 io_bits & (1 << chan)) ? COMEDI_OUTPUT : COMEDI_INPUT;
613 static void init_asics(struct comedi_device *dev)
615 ASIC chip to defaults */
618 for (asic = 0; asic < thisboard->num_asics; ++asic) {
620 unsigned long baseaddr = dev->iobase + asic * ASIC_IOSIZE;
622 switch_page(dev, asic, 0); /* switch back to page 0 */
624 /* first, clear all the DIO port bits */
625 for (port = 0; port < PORTS_PER_ASIC; ++port)
626 outb(0, baseaddr + REG_PORT0 + port);
628 /* Next, clear all the paged registers for each page */
629 for (page = 1; page < NUM_PAGES; ++page) {
631 /* now clear all the paged registers */
632 switch_page(dev, asic, page);
633 for (reg = FIRST_PAGED_REG;
634 reg < FIRST_PAGED_REG + NUM_PAGED_REGS; ++reg)
635 outb(0, baseaddr + reg);
638 /* DEBUG set rising edge interrupts on port0 of both asics */
639 /*switch_page(dev, asic, PAGE_POL);
640 outb(0xff, baseaddr + REG_POL0);
641 switch_page(dev, asic, PAGE_ENAB);
642 outb(0xff, baseaddr + REG_ENAB0); */
645 switch_page(dev, asic, 0); /* switch back to default page 0 */
650 static void switch_page(struct comedi_device *dev, int asic, int page)
652 if (asic < 0 || asic >= thisboard->num_asics)
653 return; /* paranoia */
654 if (page < 0 || page >= NUM_PAGES)
655 return; /* more paranoia */
657 devpriv->asics[asic].pagelock &= ~REG_PAGE_MASK;
658 devpriv->asics[asic].pagelock |= page << REG_PAGE_BITOFFSET;
660 /* now write out the shadow register */
661 outb(devpriv->asics[asic].pagelock,
662 dev->iobase + ASIC_IOSIZE * asic + REG_PAGELOCK);
666 static void lock_port(struct comedi_device *dev, int asic, int port)
668 if (asic < 0 || asic >= thisboard->num_asics)
669 return; /* paranoia */
670 if (port < 0 || port >= PORTS_PER_ASIC)
671 return; /* more paranoia */
673 devpriv->asics[asic].pagelock |= 0x1 << port;
674 /* now write out the shadow register */
675 outb(devpriv->asics[asic].pagelock,
676 dev->iobase + ASIC_IOSIZE * asic + REG_PAGELOCK);
679 static void unlock_port(struct comedi_device *dev, int asic, int port)
681 if (asic < 0 || asic >= thisboard->num_asics)
682 return; /* paranoia */
683 if (port < 0 || port >= PORTS_PER_ASIC)
684 return; /* more paranoia */
685 devpriv->asics[asic].pagelock &= ~(0x1 << port) | REG_LOCK_MASK;
686 /* now write out the shadow register */
687 outb(devpriv->asics[asic].pagelock,
688 dev->iobase + ASIC_IOSIZE * asic + REG_PAGELOCK);
692 static irqreturn_t interrupt_pcmuio(int irq, void *d)
695 struct comedi_device *dev = (struct comedi_device *) d;
697 for (asic = 0; asic < MAX_ASICS; ++asic) {
698 if (irq == devpriv->asics[asic].irq) {
700 unsigned triggered = 0;
701 unsigned long iobase = devpriv->asics[asic].iobase;
702 /* it is an interrupt for ASIC #asic */
703 unsigned char int_pend;
705 spin_lock_irqsave(&devpriv->asics[asic].spinlock, flags);
707 int_pend = inb(iobase + REG_INT_PENDING) & 0x07;
711 for (port = 0; port < INTR_PORTS_PER_ASIC;
713 if (int_pend & (0x1 << port)) {
715 io_lines_with_edges = 0;
716 switch_page(dev, asic,
718 io_lines_with_edges =
722 if (io_lines_with_edges)
723 /* clear pending interrupt */
729 io_lines_with_edges <<
737 spin_unlock_irqrestore(&devpriv->asics[asic].spinlock, flags);
740 struct comedi_subdevice *s;
741 /* TODO here: dispatch io lines to subdevs with commands.. */
742 printk("PCMUIO DEBUG: got edge detect interrupt %d asic %d which_chans: %06x\n", irq, asic, triggered);
743 for (s = dev->subdevices;
744 s < dev->subdevices + dev->n_subdevices;
746 if (subpriv->intr.asic == asic) { /* this is an interrupt subdev, and it matches this asic! */
750 spin_lock_irqsave (&subpriv->intr.spinlock, flags);
752 oldevents = s->async->events;
754 if (subpriv->intr.active) {
760 & ((0x1 << subpriv->intr.num_asic_chans) - 1)) << subpriv->intr.first_chan;
761 if (mytrig & subpriv->
775 ch = CR_CHAN(s->async->cmd.chanlist[n]);
776 if (mytrig & (1U << ch)) {
780 /* Write the scan to the buffer. */
781 if (comedi_buf_put(s->async, ((short *) &val)[0])
784 (s->async, ((short *) &val)[1])) {
785 s->async->events |= (COMEDI_CB_BLOCK | COMEDI_CB_EOS);
787 /* Overflow! Stop acquisition!! */
788 /* TODO: STOP_ACQUISITION_CALL_HERE!! */
794 /* Check for end of acquisition. */
799 /* stop_src == TRIG_COUNT */
800 if (subpriv->intr.stop_count > 0) {
804 if (subpriv->intr.stop_count == 0) {
805 s->async->events |= COMEDI_CB_EOA;
806 /* TODO: STOP_ACQUISITION_CALL_HERE!! */
816 spin_unlock_irqrestore(&subpriv->intr.spinlock, flags);
820 comedi_event(dev, s);
831 return IRQ_NONE; /* interrupt from other source */
835 static void pcmuio_stop_intr(struct comedi_device *dev, struct comedi_subdevice *s)
837 int nports, firstport, asic, port;
839 asic = subpriv->intr.asic;
841 return; /* not an interrupt subdev */
843 subpriv->intr.enabled_mask = 0;
844 subpriv->intr.active = 0;
845 s->async->inttrig = 0;
846 nports = subpriv->intr.num_asic_chans / CHANS_PER_PORT;
847 firstport = subpriv->intr.asic_chan / CHANS_PER_PORT;
848 switch_page(dev, asic, PAGE_ENAB);
849 for (port = firstport; port < firstport + nports; ++port) {
850 /* disable all intrs for this subdev.. */
851 outb(0, devpriv->asics[asic].iobase + REG_ENAB0 + port);
855 static int pcmuio_start_intr(struct comedi_device *dev, struct comedi_subdevice *s)
857 if (!subpriv->intr.continuous && subpriv->intr.stop_count == 0) {
858 /* An empty acquisition! */
859 s->async->events |= COMEDI_CB_EOA;
860 subpriv->intr.active = 0;
863 unsigned bits = 0, pol_bits = 0, n;
864 int nports, firstport, asic, port;
865 struct comedi_cmd *cmd = &s->async->cmd;
867 asic = subpriv->intr.asic;
869 return 1; /* not an interrupt
871 subpriv->intr.enabled_mask = 0;
872 subpriv->intr.active = 1;
873 nports = subpriv->intr.num_asic_chans / CHANS_PER_PORT;
874 firstport = subpriv->intr.asic_chan / CHANS_PER_PORT;
876 for (n = 0; n < cmd->chanlist_len; n++) {
877 bits |= (1U << CR_CHAN(cmd->chanlist[n]));
878 pol_bits |= (CR_AREF(cmd->chanlist[n])
879 || CR_RANGE(cmd->chanlist[n]) ? 1U : 0U)
880 << CR_CHAN(cmd->chanlist[n]);
883 bits &= ((0x1 << subpriv->intr.num_asic_chans) -
884 1) << subpriv->intr.first_chan;
885 subpriv->intr.enabled_mask = bits;
887 switch_page(dev, asic, PAGE_ENAB);
888 for (port = firstport; port < firstport + nports; ++port) {
890 bits >> (subpriv->intr.first_chan + (port -
891 firstport) * 8) & 0xff, pol =
892 pol_bits >> (subpriv->intr.first_chan + (port -
893 firstport) * 8) & 0xff;
894 /* set enab intrs for this subdev.. */
896 devpriv->asics[asic].iobase + REG_ENAB0 + port);
897 switch_page(dev, asic, PAGE_POL);
899 devpriv->asics[asic].iobase + REG_ENAB0 + port);
905 static int pcmuio_cancel(struct comedi_device *dev, struct comedi_subdevice *s)
909 spin_lock_irqsave(&subpriv->intr.spinlock, flags);
910 if (subpriv->intr.active)
911 pcmuio_stop_intr(dev, s);
912 spin_unlock_irqrestore(&subpriv->intr.spinlock, flags);
918 * Internal trigger function to start acquisition for an 'INTERRUPT' subdevice.
921 pcmuio_inttrig_start_intr(struct comedi_device *dev, struct comedi_subdevice *s,
922 unsigned int trignum)
930 spin_lock_irqsave(&subpriv->intr.spinlock, flags);
931 s->async->inttrig = 0;
932 if (subpriv->intr.active) {
933 event = pcmuio_start_intr(dev, s);
935 spin_unlock_irqrestore(&subpriv->intr.spinlock, flags);
938 comedi_event(dev, s);
945 * 'do_cmd' function for an 'INTERRUPT' subdevice.
947 static int pcmuio_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
949 struct comedi_cmd *cmd = &s->async->cmd;
953 spin_lock_irqsave(&subpriv->intr.spinlock, flags);
954 subpriv->intr.active = 1;
956 /* Set up end of acquisition. */
957 switch (cmd->stop_src) {
959 subpriv->intr.continuous = 0;
960 subpriv->intr.stop_count = cmd->stop_arg;
964 subpriv->intr.continuous = 1;
965 subpriv->intr.stop_count = 0;
969 /* Set up start of acquisition. */
970 switch (cmd->start_src) {
972 s->async->inttrig = pcmuio_inttrig_start_intr;
976 event = pcmuio_start_intr(dev, s);
979 spin_unlock_irqrestore(&subpriv->intr.spinlock, flags);
982 comedi_event(dev, s);
989 pcmuio_cmdtest(struct comedi_device *dev, struct comedi_subdevice *s, struct comedi_cmd *cmd)
991 return comedi_pcm_cmdtest(dev, s, cmd);
995 * A convenient macro that defines init_module() and cleanup_module(),
998 COMEDI_INITCLEANUP(driver);