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
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!)
79 #include <linux/comedidev.h>
81 #include <linux/pci.h> /* for PCI devices */
83 #define MIN(a,b) ( ((a) < (b)) ? (a) : (b) )
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 typedef struct pcmuio_board_struct
152 const char * const name;
154 const int num_channels_per_port;
158 static pcmuio_board pcmuio_boards[] =
173 * Useful for shorthand access to the particular board structure
175 #define thisboard ((pcmuio_board *)dev->board_ptr)
177 /* this structure is for data unique to this subdevice. */
180 /* mapping of halfwords (bytes) in port/chanarray to iobase */
181 unsigned long iobases[PORTS_PER_SUBDEV];
183 /* The below is only used for intr subdevices */
185 int asic; /* if non-negative, this subdev has an interrupt asic */
186 int first_chan; /* if nonnegative, the first channel id for
188 int num_asic_chans; /* the number of asic channels in this subdev
189 that have interrutps */
190 int asic_chan; /* if nonnegative, the first channel id with
191 respect to the asic that has interrupts */
192 int enabled_mask; /* subdev-relative channel mask for channels
193 we are interested in */
199 } pcmuio_subdev_private;
201 /* this structure is for data unique to this hardware driver. If
202 several hardware drivers keep similar information in this structure,
203 feel free to suggest moving the variable to the comedi_device struct. */
208 unsigned char pagelock; /* current page and lock*/
209 unsigned char pol [NUM_PAGED_REGS]; /* shadow of POLx registers */
210 unsigned char enab[NUM_PAGED_REGS]; /* shadow of ENABx registers */
212 unsigned long iobase;
216 pcmuio_subdev_private *sprivs;
220 * most drivers define the following macro to make it easy to
221 * access the private structure.
223 #define devpriv ((pcmuio_private *)dev->private)
224 #define subpriv ((pcmuio_subdev_private *)s->private)
226 * The comedi_driver structure tells the Comedi core module
227 * which functions to call to configure/deconfigure (attach/detach)
228 * the board, and also about the kernel module that contains
231 static int pcmuio_attach(comedi_device *dev, comedi_devconfig *it);
232 static int pcmuio_detach(comedi_device *dev);
234 static comedi_driver driver =
236 driver_name: "pcmuio",
238 attach: pcmuio_attach,
239 detach: pcmuio_detach,
240 /* It is not necessary to implement the following members if you are
241 * writing a driver for a ISA PnP or PCI card */
242 /* Most drivers will support multiple types of boards by
243 * having an array of board structures. These were defined
244 * in pcmuio_boards[] above. Note that the element 'name'
245 * was first in the structure -- Comedi uses this fact to
246 * extract the name of the board without knowing any details
247 * about the structure except for its length.
248 * When a device is attached (by comedi_config), the name
249 * of the device is given to Comedi, and Comedi tries to
250 * match it by going through the list of board names. If
251 * there is a match, the address of the pointer is put
252 * into dev->board_ptr and driver->attach() is called.
254 * Note that these are not necessary if you can determine
255 * the type of board in software. ISA PnP, PCI, and PCMCIA
256 * devices are such boards.
258 board_name: &pcmuio_boards[0].name,
259 offset: sizeof(pcmuio_board),
260 num_names: sizeof(pcmuio_boards) / sizeof(pcmuio_board),
263 static int pcmuio_dio_insn_bits(comedi_device *dev,comedi_subdevice *s,
264 comedi_insn *insn,lsampl_t *data);
265 static int pcmuio_dio_insn_config(comedi_device *dev,comedi_subdevice *s,
266 comedi_insn *insn,lsampl_t *data);
268 static irqreturn_t interrupt_pcmuio(int irq, void *d PT_REGS_ARG);
269 static void pcmuio_stop_intr(comedi_device *, comedi_subdevice *);
270 static int pcmuio_cancel(comedi_device *dev, comedi_subdevice *s);
271 static int pcmuio_cmd(comedi_device *dev, comedi_subdevice *s);
272 static int pcmuio_cmdtest(comedi_device *dev, comedi_subdevice *s, comedi_cmd *cmd);
274 /* some helper functions to deal with specifics of this device's registers */
275 static void init_asics(comedi_device *dev); /* sets up/clears ASIC chips to defaults */
276 static void switch_page(comedi_device *dev, int asic, int page);
277 static void lock_port(comedi_device *dev, int asic, int port);
278 static void unlock_port(comedi_device *dev, int asic, int port);
281 * Attach is called by the Comedi core to configure the driver
282 * for a particular board. If you specified a board_name array
283 * in the driver structure, dev->board_ptr contains that
286 static int pcmuio_attach(comedi_device *dev, comedi_devconfig *it)
289 int sdev_no, chans_left, n_subdevs, port, asic, thisasic_chanct = 0;
290 unsigned long iobase;
291 unsigned int irq[MAX_ASICS];
293 iobase = it->options[0];
294 irq[0] = it->options[1];
295 irq[1] = it->options[2];
297 printk("comedi%d: %s: io: %lx ", dev->minor, driver.driver_name, iobase);
299 dev->iobase = iobase;
301 if ( !iobase || !request_region(iobase,
302 thisboard->num_asics*ASIC_IOSIZE,
303 driver.driver_name) ) {
304 printk("I/O port conflict\n");
309 * Initialize dev->board_name. Note that we can use the "thisboard"
310 * macro now, since we just initialized it in the last line.
312 dev->board_name = thisboard->name;
315 * Allocate the private structure area. alloc_private() is a
316 * convenient macro defined in comedidev.h.
318 if (alloc_private(dev,sizeof(pcmuio_private)) < 0) {
319 printk("cannot allocate private data structure\n");
323 for (asic = 0; asic < MAX_ASICS; ++asic) {
324 devpriv->asics[asic].num = asic;
325 devpriv->asics[asic].iobase = dev->iobase + asic*ASIC_IOSIZE;
326 devpriv->asics[asic].irq = 0; /* this gets actually set at the end of
327 this function when we
328 comedi_request_irqs */
329 spin_lock_init(&devpriv->asics[asic].spinlock);
332 chans_left = CHANS_PER_ASIC * thisboard->num_asics;
333 n_subdevs = CALC_N_SUBDEVS(chans_left);
334 devpriv->sprivs = (pcmuio_subdev_private *)kmalloc(sizeof(pcmuio_subdev_private) * n_subdevs, GFP_KERNEL);
335 if (!devpriv->sprivs) {
336 printk("cannot allocate subdevice private data structures\n");
339 memset(devpriv->sprivs, 0, sizeof(pcmuio_subdev_private) * n_subdevs);
341 * Allocate the subdevice structures. alloc_subdevice() is a
342 * convenient macro defined in comedidev.h.
344 * Allocate 2 subdevs (32 + 16 DIO lines) or 3 32 DIO subdevs for the
345 * 96-channel version of the board.
347 if ( alloc_subdevices(dev, n_subdevs ) < 0 ) {
348 printk("cannot allocate subdevice data structures\n");
352 memset(dev->subdevices, 0, sizeof(*dev->subdevices) * n_subdevs);
356 for (sdev_no = 0; sdev_no < (int)dev->n_subdevices; ++sdev_no)
360 s = dev->subdevices + sdev_no;
361 s->private = devpriv->sprivs + sdev_no;
363 s->range_table = &range_digital;
364 s->subdev_flags = SDF_READABLE|SDF_WRITABLE;
365 s->type = COMEDI_SUBD_DIO;
366 s->insn_bits = pcmuio_dio_insn_bits;
367 s->insn_config = pcmuio_dio_insn_config;
368 s->n_chan = MIN(chans_left, MAX_CHANS_PER_SUBDEV);
369 subpriv->intr.asic = -1;
370 subpriv->intr.first_chan = -1;
371 subpriv->intr.asic_chan = -1;
372 subpriv->intr.num_asic_chans = -1;
373 subpriv->intr.active = 0;
376 /* save the ioport address for each 'port' of 8 channels in the
378 for (byte_no = 0; byte_no < PORTS_PER_SUBDEV; ++byte_no, ++port) {
379 if (port >= PORTS_PER_ASIC) {
384 subpriv->iobases[byte_no] = devpriv->asics[asic].iobase + port;
386 if (thisasic_chanct < CHANS_PER_PORT*INTR_PORTS_PER_ASIC
387 && subpriv->intr.asic < 0) {
388 /* this is an interrupt subdevice, so setup the struct */
389 subpriv->intr.asic = asic;
390 subpriv->intr.active = 0;
391 subpriv->intr.stop_count = 0;
392 subpriv->intr.first_chan = byte_no * 8;
393 subpriv->intr.asic_chan = thisasic_chanct;
394 subpriv->intr.num_asic_chans = s->n_chan - subpriv->intr.first_chan;
395 dev->read_subdev = s;
396 s->subdev_flags |= SDF_CMD_READ;
397 s->cancel = pcmuio_cancel;
398 s->do_cmd = pcmuio_cmd;
399 s->do_cmdtest = pcmuio_cmdtest;
400 s->len_chanlist = subpriv->intr.num_asic_chans;
402 thisasic_chanct += CHANS_PER_PORT;
404 spin_lock_init(&subpriv->intr.spinlock);
406 chans_left -= s->n_chan;
409 asic = 0; /* reset the asic to our first asic, to do intr subdevs */
415 init_asics(dev); /* clear out all the registers, basically */
417 for (asic = 0; irq[0] && asic < MAX_ASICS; ++asic) {
418 if (irq[asic] && comedi_request_irq(irq[asic], interrupt_pcmuio, IRQF_SHARED, thisboard->name, dev)) {
420 /* unroll the allocated irqs.. */
421 for (i = asic-1; i >= 0; --i) {
422 comedi_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");
448 * _detach is called to deconfigure a device. It should deallocate
450 * This function is also called when _attach() fails, so it should be
451 * careful not to release resources that were not necessarily
452 * allocated by _attach(). dev->private and dev->subdevices are
453 * deallocated automatically by the core.
455 static int pcmuio_detach(comedi_device *dev)
459 printk("comedi%d: %s: remove\n", dev->minor, driver.driver_name);
461 release_region(dev->iobase, ASIC_IOSIZE * thisboard->num_asics);
463 for (i = 0; i < MAX_ASICS; ++i) {
464 if (devpriv->asics[i].irq)
465 comedi_free_irq(devpriv->asics[i].irq, dev);
468 if (devpriv && devpriv->sprivs)
469 kfree(devpriv->sprivs);
475 /* DIO devices are slightly special. Although it is possible to
476 * implement the insn_read/insn_write interface, it is much more
477 * useful to applications if you implement the insn_bits interface.
478 * This allows packed reading/writing of the DIO channels. The
479 * comedi core can convert between insn_bits and insn_read/write */
480 static int pcmuio_dio_insn_bits(comedi_device *dev, comedi_subdevice *s,
481 comedi_insn *insn, lsampl_t *data)
484 if (insn->n != 2) return -EINVAL;
487 reading a 0 means this channel was high
488 writine a 0 sets the channel high
489 reading a 1 means this channel was low
490 writing a 1 means set this channel low
492 Therefore everything is always inverted. */
494 /* The insn data is a mask in data[0] and the new data
495 * in data[1], each channel cooresponding to a bit. */
497 #ifdef DAMMIT_ITS_BROKEN
499 printk("write mask: %08x data: %08x\n", data[0], data[1]);
504 for (byte_no = 0; byte_no < s->n_chan/CHANS_PER_PORT; ++byte_no) {
505 /* address of 8-bit port */
506 unsigned long ioaddr = subpriv->iobases[byte_no],
507 /* bit offset of port in 32-bit doubleword */
508 offset = byte_no * 8;
509 /* this 8-bit port's data */
510 unsigned char byte = 0,
511 /* The write mask for this port (if any) */
512 write_mask_byte = (data[0] >> offset) & 0xff,
513 /* The data byte for this port */
514 data_byte = (data[1] >> offset) & 0xff;
516 byte = inb(ioaddr); /* read all 8-bits for this port */
518 #ifdef DAMMIT_ITS_BROKEN
520 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);
523 if ( write_mask_byte ) {
524 /* this byte has some write_bits -- so set the output lines */
525 byte &= ~write_mask_byte; /* clear bits for write mask */
526 byte |= ~data_byte & write_mask_byte; /* set to inverted data_byte */
527 /* Write out the new digital output state */
531 #ifdef DAMMIT_ITS_BROKEN
533 printk("data_out_byte %02x\n", (unsigned)byte);
535 /* save the digital input lines for this byte.. */
536 s->state |= ((unsigned int)byte) << offset;
539 /* now return the DIO lines to data[1] - note they came inverted! */
542 #ifdef DAMMIT_ITS_BROKEN
544 printk("s->state %08x data_out %08x\n", s->state, data[1]);
550 /* The input or output configuration of each digital line is
551 * configured by a special insn_config instruction. chanspec
552 * contains the channel to be changed, and data[0] contains the
553 * value COMEDI_INPUT or COMEDI_OUTPUT. */
554 static int pcmuio_dio_insn_config(comedi_device *dev, comedi_subdevice *s,
555 comedi_insn *insn, lsampl_t *data)
557 int chan = CR_CHAN(insn->chanspec), byte_no = chan/8, bit_no = chan % 8;
558 unsigned long ioaddr;
561 /* Compute ioaddr for this channel */
562 ioaddr = subpriv->iobases[byte_no];
565 writing a 0 an IO channel's bit sets the channel to INPUT
566 and pulls the line high as well
568 writing a 1 to an IO channel's bit pulls the line low
570 All channels are implicitly always in OUTPUT mode -- but when
571 they are high they can be considered to be in INPUT mode..
573 Thus, we only force channels low if the config request was INPUT,
574 otherwise we do nothing to the hardware. */
578 case INSN_CONFIG_DIO_OUTPUT:
579 /* save to io_bits -- don't actually do anything since
580 all input channels are also output channels... */
581 s->io_bits |= 1<<chan;
583 case INSN_CONFIG_DIO_INPUT:
584 /* write a 0 to the actual register representing the channel
585 to set it to 'input'. 0 means "float high". */
587 byte &= ~(1<<bit_no); /**< set input channel to '0' */
589 /* write out byte -- this is the only time we actually affect the
590 hardware as all channels are implicitly output -- but input
591 channels are set to float-high */
594 /* save to io_bits */
595 s->io_bits &= ~(1<<chan);
598 case INSN_CONFIG_DIO_QUERY:
599 /* retreive from shadow register */
600 data[1] = (s->io_bits & (1 << chan)) ? COMEDI_OUTPUT : COMEDI_INPUT;
612 static void init_asics(comedi_device *dev) /* sets up an
613 ASIC chip to defaults */
617 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)
632 /* now clear all the paged registers*/
633 switch_page(dev, asic, page);
634 for (reg = FIRST_PAGED_REG; 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 */
651 static void switch_page(comedi_device *dev, int asic, int page)
653 if (asic < 0 || asic >= thisboard->num_asics) return; /* paranoia */
654 if (page < 0 || page >= NUM_PAGES) return; /* more paranoia */
656 devpriv->asics[asic].pagelock &= ~REG_PAGE_MASK;
657 devpriv->asics[asic].pagelock |= page<<REG_PAGE_BITOFFSET;
659 /* now write out the shadow register */
660 outb(devpriv->asics[asic].pagelock,
661 dev->iobase + ASIC_IOSIZE*asic + REG_PAGELOCK);
664 static void lock_port(comedi_device *dev, int asic, int port)
666 if (asic < 0 || asic >= thisboard->num_asics) return; /* paranoia */
667 if (port < 0 || port >= PORTS_PER_ASIC) return; /* more paranoia */
669 devpriv->asics[asic].pagelock |= 0x1<<port;
670 /* now write out the shadow register */
671 outb(devpriv->asics[asic].pagelock, dev->iobase + ASIC_IOSIZE*asic + REG_PAGELOCK);
673 (void)lock_port(dev, asic, port); /* not reached, suppress compiler warnings*/
676 static void unlock_port(comedi_device *dev, int asic, int port)
678 if (asic < 0 || asic >= thisboard->num_asics) return; /* paranoia */
679 if (port < 0 || port >= PORTS_PER_ASIC) return; /* more paranoia */
680 devpriv->asics[asic].pagelock &= ~(0x1<<port) | REG_LOCK_MASK;
681 /* now write out the shadow register */
682 outb(devpriv->asics[asic].pagelock, dev->iobase + ASIC_IOSIZE*asic + REG_PAGELOCK);
683 (void)unlock_port(dev, asic, port); /* not reached, suppress compiler warnings*/
686 static irqreturn_t interrupt_pcmuio(int irq, void *d PT_REGS_ARG)
689 comedi_device *dev = (comedi_device *)d;
691 for (asic = 0; asic < MAX_ASICS; ++asic) {
692 if (irq == devpriv->asics[asic].irq) {
694 unsigned triggered = 0;
695 unsigned long iobase = devpriv->asics[asic].iobase;
696 /* it is an interrupt for ASIC #asic */
697 unsigned char int_pend;
699 comedi_spin_lock_irqsave(&devpriv->asics[asic].spinlock, flags);
701 int_pend = inb(iobase + REG_INT_PENDING) & 0x07;
705 for (port = 0; port < INTR_PORTS_PER_ASIC; ++port) {
706 if (int_pend & (0x1<<port)) {
707 unsigned char io_lines_with_edges = 0;
708 switch_page(dev, asic, PAGE_INT_ID);
709 io_lines_with_edges = inb(iobase + REG_INT_ID0 + port);
711 if (io_lines_with_edges)
712 /* clear pending interrupt */
713 outb(0, iobase + REG_INT_ID0 + port);
715 triggered |= io_lines_with_edges << port*8;
722 comedi_spin_unlock_irqrestore(&devpriv->asics[asic].spinlock, flags);
726 /* TODO here: dispatch io lines to subdevs with commands.. */
727 printk("PCMUIO DEBUG: got edge detect interrupt %d asic %d which_chans: %06x\n", irq, asic, triggered);
728 for (s = dev->subdevices; s < dev->subdevices + dev->n_subdevices; ++s) {
729 if (subpriv->intr.asic == asic) { /* this is an interrupt subdev, and it matches this asic! */
733 comedi_spin_lock_irqsave(&subpriv->intr.spinlock, flags);
735 oldevents = s->async->events;
737 if (subpriv->intr.active) {
738 unsigned mytrig = ((triggered >> subpriv->intr.asic_chan) & ((0x1<<subpriv->intr.num_asic_chans)-1)) << subpriv->intr.first_chan;
739 if (mytrig & subpriv->intr.enabled_mask) {
741 unsigned int n, ch, len;
743 len = s->async->cmd.chanlist_len;
744 for (n = 0; n < len; n++) {
745 ch = CR_CHAN(s->async->cmd.chanlist[n]);
746 if (mytrig & (1U << ch)) {
750 /* Write the scan to the buffer. */
751 if (comedi_buf_put(s->async, ((sampl_t *)&val)[0])
752 && comedi_buf_put(s->async, ((sampl_t *)&val)[1]) ) {
753 s->async->events |= (COMEDI_CB_BLOCK | COMEDI_CB_EOS);
755 /* Overflow! Stop acquisition!! */
756 /* TODO: STOP_ACQUISITION_CALL_HERE!! */
757 pcmuio_stop_intr(dev, s);
760 /* Check for end of acquisition. */
761 if (!subpriv->intr.continuous) {
762 /* stop_src == TRIG_COUNT */
763 if (subpriv->intr.stop_count > 0) {
764 subpriv->intr.stop_count--;
765 if (subpriv->intr.stop_count == 0) {
766 s->async->events |= COMEDI_CB_EOA;
767 /* TODO: STOP_ACQUISITION_CALL_HERE!! */
768 pcmuio_stop_intr(dev, s);
775 comedi_spin_unlock_irqrestore(&subpriv->intr.spinlock, flags);
777 if (oldevents != s->async->events) {
778 comedi_event(dev, s, s->async->events);
788 if (!got1) return IRQ_NONE; /* interrupt from other source */
793 static void pcmuio_stop_intr(comedi_device *dev, comedi_subdevice *s)
795 int nports, firstport, asic, port;
797 if ( (asic = subpriv->intr.asic) < 0 ) return; /* not an interrupt subdev */
799 subpriv->intr.enabled_mask = 0;
800 subpriv->intr.active = 0;
801 s->async->inttrig = 0;
802 nports = subpriv->intr.num_asic_chans / CHANS_PER_PORT;
803 firstport = subpriv->intr.asic_chan / CHANS_PER_PORT;
804 switch_page(dev, asic, PAGE_ENAB);
805 for (port = firstport; port < firstport+nports; ++port) {
806 /* disable all intrs for this subdev.. */
807 outb(0, devpriv->asics[asic].iobase + REG_ENAB0 + port);
811 static int pcmuio_start_intr(comedi_device *dev, comedi_subdevice *s)
813 if (!subpriv->intr.continuous && subpriv->intr.stop_count == 0) {
814 /* An empty acquisition! */
815 s->async->events |= COMEDI_CB_EOA;
816 subpriv->intr.active = 0;
819 unsigned bits = 0, pol_bits = 0, n;
820 int nports, firstport, asic, port;
821 comedi_cmd *cmd = &s->async->cmd;
823 if ( (asic = subpriv->intr.asic) < 0 ) return 1; /* not an interrupt
825 subpriv->intr.enabled_mask = 0;
826 subpriv->intr.active = 1;
827 nports = subpriv->intr.num_asic_chans / CHANS_PER_PORT;
828 firstport = subpriv->intr.asic_chan / CHANS_PER_PORT;
830 for (n = 0; n < cmd->chanlist_len; n++) {
831 bits |= (1U << CR_CHAN(cmd->chanlist[n]));
833 (CR_AREF(cmd->chanlist[n]) || CR_RANGE(cmd->chanlist[n]) ? 1U : 0U)
834 << CR_CHAN(cmd->chanlist[n]);
837 bits &= ((0x1<<subpriv->intr.num_asic_chans)-1) << subpriv->intr.first_chan;
838 subpriv->intr.enabled_mask = bits;
840 switch_page(dev, asic, PAGE_ENAB);
841 for (port = firstport; port < firstport+nports; ++port) {
842 unsigned enab = bits >> (subpriv->intr.first_chan + (port-firstport)*8) & 0xff,
843 pol = pol_bits >> (subpriv->intr.first_chan + (port-firstport)*8) & 0xff ;
844 /* set enab intrs for this subdev.. */
845 outb(enab, devpriv->asics[asic].iobase + REG_ENAB0 + port);
846 switch_page(dev, asic, PAGE_POL);
847 outb(pol, devpriv->asics[asic].iobase + REG_ENAB0 + port);
853 static int pcmuio_cancel(comedi_device *dev, comedi_subdevice *s)
857 comedi_spin_lock_irqsave(&subpriv->intr.spinlock, flags);
858 if (subpriv->intr.active) pcmuio_stop_intr(dev, s);
859 comedi_spin_unlock_irqrestore(&subpriv->intr.spinlock, flags);
865 * Internal trigger function to start acquisition for an 'INTERRUPT' subdevice.
868 pcmuio_inttrig_start_intr(comedi_device *dev, comedi_subdevice *s, unsigned int trignum)
873 if (trignum != 0) return -EINVAL;
875 comedi_spin_lock_irqsave(&subpriv->intr.spinlock, flags);
876 s->async->inttrig = 0;
877 if (subpriv->intr.active) {
878 event = pcmuio_start_intr(dev, s);
880 comedi_spin_unlock_irqrestore(&subpriv->intr.spinlock, flags);
883 comedi_event(dev, s, s->async->events);
891 * 'do_cmd' function for an 'INTERRUPT' subdevice.
894 pcmuio_cmd(comedi_device *dev, comedi_subdevice *s)
896 comedi_cmd *cmd = &s->async->cmd;
900 comedi_spin_lock_irqsave(&subpriv->intr.spinlock, flags);
901 subpriv->intr.active = 1;
903 /* Set up end of acquisition. */
904 switch (cmd->stop_src) {
906 subpriv->intr.continuous = 0;
907 subpriv->intr.stop_count = cmd->stop_arg;
911 subpriv->intr.continuous = 1;
912 subpriv->intr.stop_count = 0;
916 /* Set up start of acquisition. */
917 switch (cmd->start_src) {
919 s->async->inttrig = pcmuio_inttrig_start_intr;
923 event = pcmuio_start_intr(dev, s);
926 comedi_spin_unlock_irqrestore(&subpriv->intr.spinlock, flags);
929 comedi_event(dev, s, s->async->events);
936 * 'do_cmdtest' function for an 'INTERRUPT' subdevice.
939 pcmuio_cmdtest(comedi_device *dev, comedi_subdevice *s,
945 /* step 1: make sure trigger sources are trivially valid */
947 tmp = cmd->start_src;
948 cmd->start_src &= (TRIG_NOW | TRIG_INT);
949 if (!cmd->start_src || tmp != cmd->start_src) err++;
951 tmp = cmd->scan_begin_src;
952 cmd->scan_begin_src &= TRIG_EXT;
953 if (!cmd->scan_begin_src || tmp != cmd->scan_begin_src) err++;
955 tmp = cmd->convert_src;
956 cmd->convert_src &= TRIG_NOW;
957 if (!cmd->convert_src || tmp != cmd->convert_src) err++;
959 tmp = cmd->scan_end_src;
960 cmd->scan_end_src &= TRIG_COUNT;
961 if (!cmd->scan_end_src || tmp != cmd->scan_end_src) err++;
964 cmd->stop_src &= (TRIG_COUNT | TRIG_NONE);
965 if (!cmd->stop_src || tmp != cmd->stop_src) err++;
969 /* step 2: make sure trigger sources are unique and mutually compatible */
971 /* these tests are true if more than one _src bit is set */
972 if ((cmd->start_src & (cmd->start_src - 1)) != 0) err++;
973 if ((cmd->scan_begin_src & (cmd->scan_begin_src - 1)) != 0) err++;
974 if ((cmd->convert_src & (cmd->convert_src - 1)) != 0) err++;
975 if ((cmd->scan_end_src & (cmd->scan_end_src - 1)) != 0) err++;
976 if ((cmd->stop_src & (cmd->stop_src - 1)) != 0) err++;
980 /* step 3: make sure arguments are trivially compatible */
982 /* cmd->start_src == TRIG_NOW || cmd->start_src == TRIG_INT */
983 if (cmd->start_arg != 0) {
988 /* cmd->scan_begin_src == TRIG_EXT */
989 if (cmd->scan_begin_arg != 0) {
990 cmd->scan_begin_arg = 0;
994 /* cmd->convert_src == TRIG_NOW */
995 if (cmd->convert_arg != 0) {
996 cmd->convert_arg = 0;
1000 /* cmd->scan_end_src == TRIG_COUNT */
1001 if (cmd->scan_end_arg != cmd->chanlist_len) {
1002 cmd->scan_end_arg = cmd->chanlist_len;
1006 switch (cmd->stop_src) {
1008 /* any count allowed */
1011 if (cmd->stop_arg != 0) {
1022 /* step 4: fix up any arguments */
1024 /* if (err) return 4; */
1030 * A convenient macro that defines init_module() and cleanup_module(),
1033 COMEDI_INITCLEANUP(driver);