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.)
7 Copyright (C) 2005 MEV Ltd. <http://www.mev.co.uk/>
9 COMEDI - Linux Control and Measurement Device Interface
10 Copyright (C) 1998,2000 David A. Schleef <ds@schleef.org>
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.
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.
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.
29 Description: Amplicon 200 Series Digital I/O
30 Author: Ian Abbott <abbotti@mev.co.uk>
31 Devices: [Amplicon] PC212E (pc212e), PC214E (pc214e), PC215E (pc215e),
32 PCI215 (pci215 or amplc_dio200), PC218E (pc218e), PC272E (pc272e),
33 PCI272 (pci272 or amplc_dio200)
34 Updated: Wed, 22 Oct 2008 13:36:02 +0100
37 Configuration options - PC212E, PC214E, PC215E, PC218E, PC272E:
38 [0] - I/O port base address
39 [1] - IRQ (optional, but commands won't work without it)
41 Configuration options - PCI215, PCI272:
42 [0] - PCI bus of device (optional)
43 [1] - PCI slot of device (optional)
44 If bus/slot is not specified, the first available PCI device will
47 Passing a zero for an option is the same as leaving it unspecified.
51 PC218E PC212E PC215E/PCI215
52 ------------- ------------- -------------
56 2 CTR-Y1 CTR-Y2 CTR-Z1
57 3 CTR-Y2 CTR-Z1 CTR-Z2
58 4 CTR-Z1 CTR-Z2 INTERRUPT
63 ------------- -------------
68 3 INTERRUPT* INTERRUPT
70 Each PPI is a 8255 chip providing 24 DIO channels. The DIO channels
71 are configurable as inputs or outputs in four groups:
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
78 Only mode 0 of the 8255 chips is supported.
80 Each CTR is a 8254 chip providing 3 16-bit counter channels. Each
81 channel is configured individually with INSN_CONFIG instructions. The
82 specific type of configuration instruction is specified in data[0].
83 Some configuration instructions expect an additional parameter in
84 data[1]; others return a value in data[1]. The following configuration
85 instructions are supported:
87 INSN_CONFIG_SET_COUNTER_MODE. Sets the counter channel's mode and
88 BCD/binary setting specified in data[1].
90 INSN_CONFIG_8254_READ_STATUS. Reads the status register value for the
91 counter channel into data[1].
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
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.
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
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
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
132 INSN_CONFIG_GET_GATE_SRC. Returns the counter channel's current gate
135 Clock and gate interconnection notes:
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.
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.
145 3. The counter subdevices are connected in a ring, so the highest
146 counter subdevice precedes the lowest.
148 The 'INTERRUPT' subdevice pretends to be a digital input subdevice. The
149 digital inputs come from the interrupt status register. The number of
150 channels matches the number of interrupt sources. The PC214E does not
151 have an interrupt status register; see notes on 'INTERRUPT SOURCES'
156 PC218E PC212E PC215E/PCI215
157 ------------- ------------- -------------
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
167 ------------- -------------
176 When an interrupt source is enabled in the interrupt source enable
177 register, a rising edge on the source signal latches the corresponding
178 bit to 1 in the interrupt status register.
180 When the interrupt status register value as a whole (actually, just the
181 6 least significant bits) goes from zero to non-zero, the board will
182 generate an interrupt. For level-triggered hardware interrupts (PCI
183 card), the interrupt will remain asserted until the interrupt status
184 register is cleared to zero. For edge-triggered hardware interrupts
185 (ISA card), no further interrupts will occur until the interrupt status
186 register is cleared to zero. To clear a bit to zero in the interrupt
187 status register, the corresponding interrupt source must be disabled
188 in the interrupt source enable register (there is no separate interrupt
191 The PC214E does not have an interrupt source enable register or an
192 interrupt status register; its 'INTERRUPT' subdevice has a single
193 channel and its interrupt source is selected by the position of jumper
198 The driver supports a read streaming acquisition command on the
199 'INTERRUPT' subdevice. The channel list selects the interrupt sources
200 to be enabled. All channels will be sampled together (convert_src ==
201 TRIG_NOW). The scan begins a short time after the hardware interrupt
202 occurs, subject to interrupt latencies (scan_begin_src == TRIG_EXT,
203 scan_begin_arg == 0). The value read from the interrupt status register
204 is packed into a short value, one bit per requested channel, in the
205 order they appear in the channel list.
208 #include <linux/interrupt.h>
210 #include "../comedidev.h"
212 #include "comedi_pci.h"
217 #define DIO200_DRIVER_NAME "amplc_dio200"
220 /* #define PCI_VENDOR_ID_AMPLICON 0x14dc */
221 #define PCI_DEVICE_ID_AMPLICON_PCI272 0x000a
222 #define PCI_DEVICE_ID_AMPLICON_PCI215 0x000b
223 #define PCI_DEVICE_ID_INVALID 0xffff
225 /* 200 series registers */
226 #define DIO200_IO_SIZE 0x20
227 #define DIO200_XCLK_SCE 0x18 /* Group X clock selection register */
228 #define DIO200_YCLK_SCE 0x19 /* Group Y clock selection register */
229 #define DIO200_ZCLK_SCE 0x1a /* Group Z clock selection register */
230 #define DIO200_XGAT_SCE 0x1b /* Group X gate selection register */
231 #define DIO200_YGAT_SCE 0x1c /* Group Y gate selection register */
232 #define DIO200_ZGAT_SCE 0x1d /* Group Z gate selection register */
233 #define DIO200_INT_SCE 0x1e /* Interrupt enable/status register */
236 * Macros for constructing value for DIO_200_?CLK_SCE and
237 * DIO_200_?GAT_SCE registers:
239 * 'which' is: 0 for CTR-X1, CTR-Y1, CTR-Z1; 1 for CTR-X2, CTR-Y2 or CTR-Z2.
240 * 'chan' is the channel: 0, 1 or 2.
241 * 'source' is the signal source: 0 to 7.
243 #define CLK_SCE(which, chan, source) (((which) << 5) | ((chan) << 3) | (source))
244 #define GAT_SCE(which, chan, source) (((which) << 5) | ((chan) << 3) | (source))
247 * Periods of the internal clock sources in nanoseconds.
249 static const unsigned clock_period[8] = {
250 0, /* dedicated clock input/output pin */
257 0 /* group clock input pin */
261 * Board descriptions.
264 enum dio200_bustype { isa_bustype, pci_bustype };
269 pc215e_model, pci215_model,
271 pc272e_model, pci272_model,
283 struct dio200_board {
285 unsigned short devid;
286 enum dio200_bustype bustype;
287 enum dio200_model model;
288 enum dio200_layout layout;
291 static const struct dio200_board dio200_boards[] = {
294 .bustype = isa_bustype,
295 .model = pc212e_model,
296 .layout = pc212_layout,
300 .bustype = isa_bustype,
301 .model = pc214e_model,
302 .layout = pc214_layout,
306 .bustype = isa_bustype,
307 .model = pc215e_model,
308 .layout = pc215_layout,
310 #ifdef CONFIG_COMEDI_PCI
313 .devid = PCI_DEVICE_ID_AMPLICON_PCI215,
314 .bustype = pci_bustype,
315 .model = pci215_model,
316 .layout = pc215_layout,
321 .bustype = isa_bustype,
322 .model = pc218e_model,
323 .layout = pc218_layout,
327 .bustype = isa_bustype,
328 .model = pc272e_model,
329 .layout = pc272_layout,
331 #ifdef CONFIG_COMEDI_PCI
334 .devid = PCI_DEVICE_ID_AMPLICON_PCI272,
335 .bustype = pci_bustype,
336 .model = pci272_model,
337 .layout = pc272_layout,
340 #ifdef CONFIG_COMEDI_PCI
342 .name = DIO200_DRIVER_NAME,
343 .devid = PCI_DEVICE_ID_INVALID,
344 .bustype = pci_bustype,
345 .model = anypci_model, /* wildcard */
351 * Layout descriptions - some ISA and PCI board descriptions share the same
355 enum dio200_sdtype { sd_none, sd_intr, sd_8255, sd_8254 };
357 #define DIO200_MAX_SUBDEVS 7
358 #define DIO200_MAX_ISNS 6
360 struct dio200_layout_struct {
361 unsigned short n_subdevs; /* number of subdevices */
362 unsigned char sdtype[DIO200_MAX_SUBDEVS]; /* enum dio200_sdtype */
363 unsigned char sdinfo[DIO200_MAX_SUBDEVS]; /* depends on sdtype */
364 char has_int_sce; /* has interrupt enable/status register */
365 char has_clk_gat_sce; /* has clock/gate selection registers */
368 static const struct dio200_layout_struct dio200_layouts[] = {
371 .sdtype = {sd_8255, sd_8254, sd_8254, sd_8254,
374 .sdinfo = {0x00, 0x08, 0x0C, 0x10, 0x14,
377 .has_clk_gat_sce = 1,
381 .sdtype = {sd_8255, sd_8255, sd_8254,
383 .sdinfo = {0x00, 0x08, 0x10, 0x01},
385 .has_clk_gat_sce = 0,
389 .sdtype = {sd_8255, sd_8255, sd_8254,
392 .sdinfo = {0x00, 0x08, 0x10, 0x14, 0x3F},
394 .has_clk_gat_sce = 1,
398 .sdtype = {sd_8254, sd_8254, sd_8255, sd_8254,
401 .sdinfo = {0x00, 0x04, 0x08, 0x0C, 0x10,
405 .has_clk_gat_sce = 1,
409 .sdtype = {sd_8255, sd_8255, sd_8255,
411 .sdinfo = {0x00, 0x08, 0x10, 0x3F},
413 .has_clk_gat_sce = 0,
421 #ifdef CONFIG_COMEDI_PCI
422 static DEFINE_PCI_DEVICE_TABLE(dio200_pci_table) = {
423 {PCI_VENDOR_ID_AMPLICON, PCI_DEVICE_ID_AMPLICON_PCI215,
424 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
425 {PCI_VENDOR_ID_AMPLICON, PCI_DEVICE_ID_AMPLICON_PCI272,
426 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
430 MODULE_DEVICE_TABLE(pci, dio200_pci_table);
431 #endif /* CONFIG_COMEDI_PCI */
434 * Useful for shorthand access to the particular board structure
436 #define thisboard ((const struct dio200_board *)dev->board_ptr)
437 #define thislayout (&dio200_layouts[((struct dio200_board *)dev->board_ptr)->layout])
439 /* this structure is for data unique to this hardware driver. If
440 several hardware drivers keep similar information in this structure,
441 feel free to suggest moving the variable to the struct comedi_device struct. */
442 struct dio200_private {
443 #ifdef CONFIG_COMEDI_PCI
444 struct pci_dev *pci_dev; /* PCI device */
449 #define devpriv ((struct dio200_private *)dev->private)
451 struct dio200_subdev_8254 {
452 unsigned long iobase; /* Counter base address */
453 unsigned long clk_sce_iobase; /* CLK_SCE base address */
454 unsigned long gat_sce_iobase; /* GAT_SCE base address */
455 int which; /* Bit 5 of CLK_SCE or GAT_SCE */
457 unsigned clock_src[3]; /* Current clock sources */
458 unsigned gate_src[3]; /* Current gate sources */
461 struct dio200_subdev_intr {
462 unsigned long iobase;
466 unsigned int valid_isns;
467 unsigned int enabled_isns;
468 unsigned int stopcount;
473 * The struct comedi_driver structure tells the Comedi core module
474 * which functions to call to configure/deconfigure (attach/detach)
475 * the board, and also about the kernel module that contains
478 static int dio200_attach(struct comedi_device *dev, struct comedi_devconfig *it);
479 static int dio200_detach(struct comedi_device *dev);
480 static struct comedi_driver driver_amplc_dio200 = {
481 .driver_name = DIO200_DRIVER_NAME,
482 .module = THIS_MODULE,
483 .attach = dio200_attach,
484 .detach = dio200_detach,
485 .board_name = &dio200_boards[0].name,
486 .offset = sizeof(struct dio200_board),
487 .num_names = ARRAY_SIZE(dio200_boards),
490 #ifdef CONFIG_COMEDI_PCI
491 COMEDI_PCI_INITCLEANUP(driver_amplc_dio200, dio200_pci_table);
493 COMEDI_INITCLEANUP(driver_amplc_dio200);
497 * This function looks for a PCI device matching the requested board name,
500 #ifdef CONFIG_COMEDI_PCI
502 dio200_find_pci(struct comedi_device *dev, int bus, int slot,
503 struct pci_dev **pci_dev_p)
505 struct pci_dev *pci_dev = NULL;
509 /* Look for matching PCI device. */
510 for (pci_dev = pci_get_device(PCI_VENDOR_ID_AMPLICON, PCI_ANY_ID, NULL);
512 pci_dev = pci_get_device(PCI_VENDOR_ID_AMPLICON,
513 PCI_ANY_ID, pci_dev)) {
514 /* If bus/slot specified, check them. */
516 if (bus != pci_dev->bus->number
517 || slot != PCI_SLOT(pci_dev->devfn))
520 if (thisboard->model == anypci_model) {
521 /* Match any supported model. */
524 for (i = 0; i < ARRAY_SIZE(dio200_boards); i++) {
525 if (dio200_boards[i].bustype != pci_bustype)
527 if (pci_dev->device == dio200_boards[i].devid) {
528 /* Change board_ptr to matched board. */
529 dev->board_ptr = &dio200_boards[i];
533 if (i == ARRAY_SIZE(dio200_boards))
536 /* Match specific model name. */
537 if (pci_dev->device != thisboard->devid)
542 *pci_dev_p = pci_dev;
545 /* No match found. */
548 "comedi%d: error! no %s found at pci %02x:%02x!\n",
549 dev->minor, thisboard->name, bus, slot);
551 printk(KERN_ERR "comedi%d: error! no %s found!\n",
552 dev->minor, thisboard->name);
559 * This function checks and requests an I/O region, reporting an error
560 * if there is a conflict.
563 dio200_request_region(unsigned minor, unsigned long from, unsigned long extent)
565 if (!from || !request_region(from, extent, DIO200_DRIVER_NAME)) {
566 printk(KERN_ERR "comedi%d: I/O port conflict (%#lx,%lu)!\n",
567 minor, from, extent);
574 * 'insn_bits' function for an 'INTERRUPT' subdevice.
577 dio200_subdev_intr_insn_bits(struct comedi_device *dev, struct comedi_subdevice *s,
578 struct comedi_insn *insn, unsigned int *data)
580 struct dio200_subdev_intr *subpriv = s->private;
582 if (subpriv->has_int_sce) {
583 /* Just read the interrupt status register. */
584 data[1] = inb(subpriv->iobase) & subpriv->valid_isns;
586 /* No interrupt status register. */
594 * Called to stop acquisition for an 'INTERRUPT' subdevice.
596 static void dio200_stop_intr(struct comedi_device *dev, struct comedi_subdevice *s)
598 struct dio200_subdev_intr *subpriv = s->private;
601 subpriv->enabled_isns = 0;
602 if (subpriv->has_int_sce) {
603 outb(0, subpriv->iobase);
608 * Called to start acquisition for an 'INTERRUPT' subdevice.
610 static int dio200_start_intr(struct comedi_device *dev, struct comedi_subdevice *s)
614 struct dio200_subdev_intr *subpriv = s->private;
615 struct comedi_cmd *cmd = &s->async->cmd;
618 if (!subpriv->continuous && subpriv->stopcount == 0) {
619 /* An empty acquisition! */
620 s->async->events |= COMEDI_CB_EOA;
624 /* Determine interrupt sources to enable. */
627 for (n = 0; n < cmd->chanlist_len; n++) {
628 isn_bits |= (1U << CR_CHAN(cmd->chanlist[n]));
631 isn_bits &= subpriv->valid_isns;
632 /* Enable interrupt sources. */
633 subpriv->enabled_isns = isn_bits;
634 if (subpriv->has_int_sce) {
635 outb(isn_bits, subpriv->iobase);
643 * Internal trigger function to start acquisition for an 'INTERRUPT' subdevice.
646 dio200_inttrig_start_intr(struct comedi_device *dev, struct comedi_subdevice *s,
647 unsigned int trignum)
649 struct dio200_subdev_intr *subpriv;
656 subpriv = s->private;
658 comedi_spin_lock_irqsave(&subpriv->spinlock, flags);
659 s->async->inttrig = 0;
660 if (subpriv->active) {
661 event = dio200_start_intr(dev, s);
663 comedi_spin_unlock_irqrestore(&subpriv->spinlock, flags);
666 comedi_event(dev, s);
673 * This is called from the interrupt service routine to handle a read
674 * scan on an 'INTERRUPT' subdevice.
676 static int dio200_handle_read_intr(struct comedi_device *dev, struct comedi_subdevice *s)
678 struct dio200_subdev_intr *subpriv = s->private;
681 unsigned cur_enabled;
682 unsigned int oldevents;
687 comedi_spin_lock_irqsave(&subpriv->spinlock, flags);
688 oldevents = s->async->events;
689 if (subpriv->has_int_sce) {
691 * Collect interrupt sources that have triggered and disable
692 * them temporarily. Loop around until no extra interrupt
693 * sources have triggered, at which point, the valid part of
694 * the interrupt status register will read zero, clearing the
695 * cause of the interrupt.
697 * Mask off interrupt sources already seen to avoid infinite
698 * loop in case of misconfiguration.
700 cur_enabled = subpriv->enabled_isns;
701 while ((intstat = (inb(subpriv->iobase) & subpriv->valid_isns
702 & ~triggered)) != 0) {
703 triggered |= intstat;
704 cur_enabled &= ~triggered;
705 outb(cur_enabled, subpriv->iobase);
709 * No interrupt status register. Assume the single interrupt
710 * source has triggered.
712 triggered = subpriv->enabled_isns;
717 * Some interrupt sources have triggered and have been
718 * temporarily disabled to clear the cause of the interrupt.
720 * Reenable them NOW to minimize the time they are disabled.
722 cur_enabled = subpriv->enabled_isns;
723 if (subpriv->has_int_sce) {
724 outb(cur_enabled, subpriv->iobase);
727 if (subpriv->active) {
729 * The command is still active.
731 * Ignore interrupt sources that the command isn't
732 * interested in (just in case there's a race
735 if (triggered & subpriv->enabled_isns) {
736 /* Collect scan data. */
738 unsigned int n, ch, len;
741 len = s->async->cmd.chanlist_len;
742 for (n = 0; n < len; n++) {
743 ch = CR_CHAN(s->async->cmd.chanlist[n]);
744 if (triggered & (1U << ch)) {
748 /* Write the scan to the buffer. */
749 if (comedi_buf_put(s->async, val)) {
750 s->async->events |= (COMEDI_CB_BLOCK |
753 /* Error! Stop acquisition. */
754 dio200_stop_intr(dev, s);
755 s->async->events |= COMEDI_CB_ERROR
756 | COMEDI_CB_OVERFLOW;
757 comedi_error(dev, "buffer overflow");
760 /* Check for end of acquisition. */
761 if (!subpriv->continuous) {
762 /* stop_src == TRIG_COUNT */
763 if (subpriv->stopcount > 0) {
764 subpriv->stopcount--;
765 if (subpriv->stopcount == 0) {
768 dio200_stop_intr(dev,
776 comedi_spin_unlock_irqrestore(&subpriv->spinlock, flags);
778 if (oldevents != s->async->events) {
779 comedi_event(dev, s);
782 return (triggered != 0);
786 * 'cancel' function for an 'INTERRUPT' subdevice.
788 static int dio200_subdev_intr_cancel(struct comedi_device *dev, struct comedi_subdevice *s)
790 struct dio200_subdev_intr *subpriv = s->private;
793 comedi_spin_lock_irqsave(&subpriv->spinlock, flags);
794 if (subpriv->active) {
795 dio200_stop_intr(dev, s);
797 comedi_spin_unlock_irqrestore(&subpriv->spinlock, flags);
803 * 'do_cmdtest' function for an 'INTERRUPT' subdevice.
806 dio200_subdev_intr_cmdtest(struct comedi_device *dev, struct comedi_subdevice *s,
807 struct comedi_cmd *cmd)
812 /* step 1: make sure trigger sources are trivially valid */
814 tmp = cmd->start_src;
815 cmd->start_src &= (TRIG_NOW | TRIG_INT);
816 if (!cmd->start_src || tmp != cmd->start_src)
819 tmp = cmd->scan_begin_src;
820 cmd->scan_begin_src &= TRIG_EXT;
821 if (!cmd->scan_begin_src || tmp != cmd->scan_begin_src)
824 tmp = cmd->convert_src;
825 cmd->convert_src &= TRIG_NOW;
826 if (!cmd->convert_src || tmp != cmd->convert_src)
829 tmp = cmd->scan_end_src;
830 cmd->scan_end_src &= TRIG_COUNT;
831 if (!cmd->scan_end_src || tmp != cmd->scan_end_src)
835 cmd->stop_src &= (TRIG_COUNT | TRIG_NONE);
836 if (!cmd->stop_src || tmp != cmd->stop_src)
842 /* step 2: make sure trigger sources are unique and mutually compatible */
844 /* these tests are true if more than one _src bit is set */
845 if ((cmd->start_src & (cmd->start_src - 1)) != 0)
847 if ((cmd->scan_begin_src & (cmd->scan_begin_src - 1)) != 0)
849 if ((cmd->convert_src & (cmd->convert_src - 1)) != 0)
851 if ((cmd->scan_end_src & (cmd->scan_end_src - 1)) != 0)
853 if ((cmd->stop_src & (cmd->stop_src - 1)) != 0)
859 /* step 3: make sure arguments are trivially compatible */
861 /* cmd->start_src == TRIG_NOW || cmd->start_src == TRIG_INT */
862 if (cmd->start_arg != 0) {
867 /* cmd->scan_begin_src == TRIG_EXT */
868 if (cmd->scan_begin_arg != 0) {
869 cmd->scan_begin_arg = 0;
873 /* cmd->convert_src == TRIG_NOW */
874 if (cmd->convert_arg != 0) {
875 cmd->convert_arg = 0;
879 /* cmd->scan_end_src == TRIG_COUNT */
880 if (cmd->scan_end_arg != cmd->chanlist_len) {
881 cmd->scan_end_arg = cmd->chanlist_len;
885 switch (cmd->stop_src) {
887 /* any count allowed */
890 if (cmd->stop_arg != 0) {
902 /* step 4: fix up any arguments */
904 /* if (err) return 4; */
910 * 'do_cmd' function for an 'INTERRUPT' subdevice.
912 static int dio200_subdev_intr_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
914 struct comedi_cmd *cmd = &s->async->cmd;
915 struct dio200_subdev_intr *subpriv = s->private;
919 comedi_spin_lock_irqsave(&subpriv->spinlock, flags);
922 /* Set up end of acquisition. */
923 switch (cmd->stop_src) {
925 subpriv->continuous = 0;
926 subpriv->stopcount = cmd->stop_arg;
930 subpriv->continuous = 1;
931 subpriv->stopcount = 0;
935 /* Set up start of acquisition. */
936 switch (cmd->start_src) {
938 s->async->inttrig = dio200_inttrig_start_intr;
942 event = dio200_start_intr(dev, s);
945 comedi_spin_unlock_irqrestore(&subpriv->spinlock, flags);
948 comedi_event(dev, s);
955 * This function initializes an 'INTERRUPT' subdevice.
958 dio200_subdev_intr_init(struct comedi_device *dev, struct comedi_subdevice *s,
959 unsigned long iobase, unsigned valid_isns, int has_int_sce)
961 struct dio200_subdev_intr *subpriv;
963 subpriv = kzalloc(sizeof(*subpriv), GFP_KERNEL);
965 printk(KERN_ERR "comedi%d: error! out of memory!\n",
969 subpriv->iobase = iobase;
970 subpriv->has_int_sce = has_int_sce;
971 subpriv->valid_isns = valid_isns;
972 spin_lock_init(&subpriv->spinlock);
975 outb(0, subpriv->iobase); /* Disable interrupt sources. */
978 s->private = subpriv;
979 s->type = COMEDI_SUBD_DI;
980 s->subdev_flags = SDF_READABLE | SDF_CMD_READ;
982 s->n_chan = DIO200_MAX_ISNS;
983 s->len_chanlist = DIO200_MAX_ISNS;
985 /* No interrupt source register. Support single channel. */
989 s->range_table = &range_digital;
991 s->insn_bits = dio200_subdev_intr_insn_bits;
992 s->do_cmdtest = dio200_subdev_intr_cmdtest;
993 s->do_cmd = dio200_subdev_intr_cmd;
994 s->cancel = dio200_subdev_intr_cancel;
1000 * This function cleans up an 'INTERRUPT' subdevice.
1003 dio200_subdev_intr_cleanup(struct comedi_device *dev, struct comedi_subdevice *s)
1005 struct dio200_subdev_intr *subpriv = s->private;
1013 * Interrupt service routine.
1015 static irqreturn_t dio200_interrupt(int irq, void *d)
1017 struct comedi_device *dev = d;
1020 if (!dev->attached) {
1024 if (devpriv->intr_sd >= 0) {
1025 handled = dio200_handle_read_intr(dev,
1026 dev->subdevices + devpriv->intr_sd);
1031 return IRQ_RETVAL(handled);
1035 * Handle 'insn_read' for an '8254' counter subdevice.
1038 dio200_subdev_8254_read(struct comedi_device *dev, struct comedi_subdevice *s,
1039 struct comedi_insn *insn, unsigned int *data)
1041 struct dio200_subdev_8254 *subpriv = s->private;
1042 int chan = CR_CHAN(insn->chanspec);
1044 data[0] = i8254_read(subpriv->iobase, 0, chan);
1050 * Handle 'insn_write' for an '8254' counter subdevice.
1053 dio200_subdev_8254_write(struct comedi_device *dev, struct comedi_subdevice *s,
1054 struct comedi_insn *insn, unsigned int *data)
1056 struct dio200_subdev_8254 *subpriv = s->private;
1057 int chan = CR_CHAN(insn->chanspec);
1059 i8254_write(subpriv->iobase, 0, chan, data[0]);
1065 * Set gate source for an '8254' counter subdevice channel.
1068 dio200_set_gate_src(struct dio200_subdev_8254 *subpriv, unsigned int counter_number,
1069 unsigned int gate_src)
1073 if (!subpriv->has_clk_gat_sce)
1075 if (counter_number > 2)
1080 subpriv->gate_src[counter_number] = gate_src;
1081 byte = GAT_SCE(subpriv->which, counter_number, gate_src);
1082 outb(byte, subpriv->gat_sce_iobase);
1088 * Get gate source for an '8254' counter subdevice channel.
1091 dio200_get_gate_src(struct dio200_subdev_8254 *subpriv, unsigned int counter_number)
1093 if (!subpriv->has_clk_gat_sce)
1095 if (counter_number > 2)
1098 return subpriv->gate_src[counter_number];
1102 * Set clock source for an '8254' counter subdevice channel.
1105 dio200_set_clock_src(struct dio200_subdev_8254 *subpriv, unsigned int counter_number,
1106 unsigned int clock_src)
1110 if (!subpriv->has_clk_gat_sce)
1112 if (counter_number > 2)
1117 subpriv->clock_src[counter_number] = clock_src;
1118 byte = CLK_SCE(subpriv->which, counter_number, clock_src);
1119 outb(byte, subpriv->clk_sce_iobase);
1125 * Get clock source for an '8254' counter subdevice channel.
1128 dio200_get_clock_src(struct dio200_subdev_8254 *subpriv, unsigned int counter_number,
1129 unsigned int *period_ns)
1133 if (!subpriv->has_clk_gat_sce)
1135 if (counter_number > 2)
1138 clock_src = subpriv->clock_src[counter_number];
1139 *period_ns = clock_period[clock_src];
1144 * Handle 'insn_config' for an '8254' counter subdevice.
1147 dio200_subdev_8254_config(struct comedi_device *dev, struct comedi_subdevice *s,
1148 struct comedi_insn *insn, unsigned int *data)
1150 struct dio200_subdev_8254 *subpriv = s->private;
1152 int chan = CR_CHAN(insn->chanspec);
1155 case INSN_CONFIG_SET_COUNTER_MODE:
1156 ret = i8254_set_mode(subpriv->iobase, 0, chan, data[1]);
1160 case INSN_CONFIG_8254_READ_STATUS:
1161 data[1] = i8254_status(subpriv->iobase, 0, chan);
1163 case INSN_CONFIG_SET_GATE_SRC:
1164 ret = dio200_set_gate_src(subpriv, chan, data[2]);
1168 case INSN_CONFIG_GET_GATE_SRC:
1169 ret = dio200_get_gate_src(subpriv, chan);
1174 case INSN_CONFIG_SET_CLOCK_SRC:
1175 ret = dio200_set_clock_src(subpriv, chan, data[1]);
1179 case INSN_CONFIG_GET_CLOCK_SRC:
1180 ret = dio200_get_clock_src(subpriv, chan, &data[2]);
1193 * This function initializes an '8254' counter subdevice.
1195 * Note: iobase is the base address of the board, not the subdevice;
1196 * offset is the offset to the 8254 chip.
1199 dio200_subdev_8254_init(struct comedi_device *dev, struct comedi_subdevice *s,
1200 unsigned long iobase, unsigned offset, int has_clk_gat_sce)
1202 struct dio200_subdev_8254 *subpriv;
1205 subpriv = kzalloc(sizeof(*subpriv), GFP_KERNEL);
1207 printk(KERN_ERR "comedi%d: error! out of memory!\n",
1212 s->private = subpriv;
1213 s->type = COMEDI_SUBD_COUNTER;
1214 s->subdev_flags = SDF_WRITABLE | SDF_READABLE;
1216 s->maxdata = 0xFFFF;
1217 s->insn_read = dio200_subdev_8254_read;
1218 s->insn_write = dio200_subdev_8254_write;
1219 s->insn_config = dio200_subdev_8254_config;
1221 subpriv->iobase = offset + iobase;
1222 subpriv->has_clk_gat_sce = has_clk_gat_sce;
1223 if (has_clk_gat_sce) {
1224 /* Derive CLK_SCE and GAT_SCE register offsets from
1226 subpriv->clk_sce_iobase =
1227 DIO200_XCLK_SCE + (offset >> 3) + iobase;
1228 subpriv->gat_sce_iobase =
1229 DIO200_XGAT_SCE + (offset >> 3) + iobase;
1230 subpriv->which = (offset >> 2) & 1;
1233 /* Initialize channels. */
1234 for (chan = 0; chan < 3; chan++) {
1235 i8254_set_mode(subpriv->iobase, 0, chan,
1236 I8254_MODE0 | I8254_BINARY);
1237 if (subpriv->has_clk_gat_sce) {
1238 /* Gate source 0 is VCC (logic 1). */
1239 dio200_set_gate_src(subpriv, chan, 0);
1240 /* Clock source 0 is the dedicated clock input. */
1241 dio200_set_clock_src(subpriv, chan, 0);
1249 * This function cleans up an '8254' counter subdevice.
1252 dio200_subdev_8254_cleanup(struct comedi_device *dev, struct comedi_subdevice *s)
1254 struct dio200_subdev_intr *subpriv = s->private;
1262 * Attach is called by the Comedi core to configure the driver
1263 * for a particular board. If you specified a board_name array
1264 * in the driver structure, dev->board_ptr contains that
1267 static int dio200_attach(struct comedi_device *dev, struct comedi_devconfig *it)
1269 struct comedi_subdevice *s;
1270 unsigned long iobase = 0;
1271 unsigned int irq = 0;
1272 #ifdef CONFIG_COMEDI_PCI
1273 struct pci_dev *pci_dev = NULL;
1274 int bus = 0, slot = 0;
1276 const struct dio200_layout_struct *layout;
1282 printk(KERN_DEBUG "comedi%d: %s: attach\n", dev->minor,
1283 DIO200_DRIVER_NAME);
1285 ret = alloc_private(dev, sizeof(struct dio200_private));
1287 printk(KERN_ERR "comedi%d: error! out of memory!\n",
1292 /* Process options. */
1293 switch (thisboard->bustype) {
1295 iobase = it->options[0];
1296 irq = it->options[1];
1299 #ifdef CONFIG_COMEDI_PCI
1301 bus = it->options[0];
1302 slot = it->options[1];
1305 ret = dio200_find_pci(dev, bus, slot, &pci_dev);
1308 devpriv->pci_dev = pci_dev;
1313 "comedi%d: %s: BUG! cannot determine board type!\n",
1314 dev->minor, DIO200_DRIVER_NAME);
1319 devpriv->intr_sd = -1;
1321 /* Enable device and reserve I/O spaces. */
1322 #ifdef CONFIG_COMEDI_PCI
1324 ret = comedi_pci_enable(pci_dev, DIO200_DRIVER_NAME);
1327 "comedi%d: error! cannot enable PCI device and request regions!\n",
1331 iobase = pci_resource_start(pci_dev, 2);
1336 ret = dio200_request_region(dev->minor, iobase, DIO200_IO_SIZE);
1341 dev->iobase = iobase;
1343 layout = thislayout;
1345 ret = alloc_subdevices(dev, layout->n_subdevs);
1347 printk(KERN_ERR "comedi%d: error! out of memory!\n",
1352 for (n = 0; n < dev->n_subdevices; n++) {
1353 s = &dev->subdevices[n];
1354 switch (layout->sdtype[n]) {
1356 /* counter subdevice (8254) */
1357 ret = dio200_subdev_8254_init(dev, s, iobase,
1358 layout->sdinfo[n], layout->has_clk_gat_sce);
1364 /* digital i/o subdevice (8255) */
1365 ret = subdev_8255_init(dev, s, 0,
1366 iobase + layout->sdinfo[n]);
1372 /* 'INTERRUPT' subdevice */
1374 ret = dio200_subdev_intr_init(dev, s,
1375 iobase + DIO200_INT_SCE,
1376 layout->sdinfo[n], layout->has_int_sce);
1380 devpriv->intr_sd = n;
1382 s->type = COMEDI_SUBD_UNUSED;
1386 s->type = COMEDI_SUBD_UNUSED;
1391 sdx = devpriv->intr_sd;
1392 if (sdx >= 0 && sdx < dev->n_subdevices) {
1393 dev->read_subdev = &dev->subdevices[sdx];
1396 dev->board_name = thisboard->name;
1399 unsigned long flags = share_irq ? IRQF_SHARED : 0;
1401 if (comedi_request_irq(irq, dio200_interrupt, flags,
1402 DIO200_DRIVER_NAME, dev) >= 0) {
1406 "comedi%d: warning! irq %u unavailable!\n",
1411 printk(KERN_INFO "comedi%d: %s ", dev->minor, dev->board_name);
1412 if (thisboard->bustype == isa_bustype) {
1413 printk("(base %#lx) ", iobase);
1415 #ifdef CONFIG_COMEDI_PCI
1416 printk("(pci %s) ", pci_name(pci_dev));
1420 printk("(irq %u%s) ", irq, (dev->irq ? "" : " UNAVAILABLE"));
1422 printk("(no irq) ");
1425 printk("attached\n");
1431 * _detach is called to deconfigure a device. It should deallocate
1433 * This function is also called when _attach() fails, so it should be
1434 * careful not to release resources that were not necessarily
1435 * allocated by _attach(). dev->private and dev->subdevices are
1436 * deallocated automatically by the core.
1438 static int dio200_detach(struct comedi_device *dev)
1440 const struct dio200_layout_struct *layout;
1443 printk(KERN_DEBUG "comedi%d: %s: detach\n", dev->minor,
1444 DIO200_DRIVER_NAME);
1447 comedi_free_irq(dev->irq, dev);
1449 if (dev->subdevices) {
1450 layout = thislayout;
1451 for (n = 0; n < dev->n_subdevices; n++) {
1452 struct comedi_subdevice *s = &dev->subdevices[n];
1453 switch (layout->sdtype[n]) {
1455 dio200_subdev_8254_cleanup(dev, s);
1458 subdev_8255_cleanup(dev, s);
1461 dio200_subdev_intr_cleanup(dev, s);
1469 #ifdef CONFIG_COMEDI_PCI
1470 if (devpriv->pci_dev) {
1472 comedi_pci_disable(devpriv->pci_dev);
1474 pci_dev_put(devpriv->pci_dev);
1479 release_region(dev->iobase, DIO200_IO_SIZE);
1483 if (dev->board_name) {
1484 printk(KERN_INFO "comedi%d: %s removed\n",
1485 dev->minor, dev->board_name);