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>
209 #include <linux/slab.h>
211 #include "../comedidev.h"
213 #include "comedi_pci.h"
218 #define DIO200_DRIVER_NAME "amplc_dio200"
221 /* #define PCI_VENDOR_ID_AMPLICON 0x14dc */
222 #define PCI_DEVICE_ID_AMPLICON_PCI272 0x000a
223 #define PCI_DEVICE_ID_AMPLICON_PCI215 0x000b
224 #define PCI_DEVICE_ID_INVALID 0xffff
226 /* 200 series registers */
227 #define DIO200_IO_SIZE 0x20
228 #define DIO200_XCLK_SCE 0x18 /* Group X clock selection register */
229 #define DIO200_YCLK_SCE 0x19 /* Group Y clock selection register */
230 #define DIO200_ZCLK_SCE 0x1a /* Group Z clock selection register */
231 #define DIO200_XGAT_SCE 0x1b /* Group X gate selection register */
232 #define DIO200_YGAT_SCE 0x1c /* Group Y gate selection register */
233 #define DIO200_ZGAT_SCE 0x1d /* Group Z gate selection register */
234 #define DIO200_INT_SCE 0x1e /* Interrupt enable/status register */
237 * Macros for constructing value for DIO_200_?CLK_SCE and
238 * DIO_200_?GAT_SCE registers:
240 * 'which' is: 0 for CTR-X1, CTR-Y1, CTR-Z1; 1 for CTR-X2, CTR-Y2 or CTR-Z2.
241 * 'chan' is the channel: 0, 1 or 2.
242 * 'source' is the signal source: 0 to 7.
244 #define CLK_SCE(which, chan, source) (((which) << 5) | ((chan) << 3) | (source))
245 #define GAT_SCE(which, chan, source) (((which) << 5) | ((chan) << 3) | (source))
248 * Periods of the internal clock sources in nanoseconds.
250 static const unsigned clock_period[8] = {
251 0, /* dedicated clock input/output pin */
258 0 /* group clock input pin */
262 * Board descriptions.
265 enum dio200_bustype { isa_bustype, pci_bustype };
270 pc215e_model, pci215_model,
272 pc272e_model, pci272_model,
284 struct dio200_board {
286 unsigned short devid;
287 enum dio200_bustype bustype;
288 enum dio200_model model;
289 enum dio200_layout layout;
292 static const struct dio200_board dio200_boards[] = {
295 .bustype = isa_bustype,
296 .model = pc212e_model,
297 .layout = pc212_layout,
301 .bustype = isa_bustype,
302 .model = pc214e_model,
303 .layout = pc214_layout,
307 .bustype = isa_bustype,
308 .model = pc215e_model,
309 .layout = pc215_layout,
311 #ifdef CONFIG_COMEDI_PCI
314 .devid = PCI_DEVICE_ID_AMPLICON_PCI215,
315 .bustype = pci_bustype,
316 .model = pci215_model,
317 .layout = pc215_layout,
322 .bustype = isa_bustype,
323 .model = pc218e_model,
324 .layout = pc218_layout,
328 .bustype = isa_bustype,
329 .model = pc272e_model,
330 .layout = pc272_layout,
332 #ifdef CONFIG_COMEDI_PCI
335 .devid = PCI_DEVICE_ID_AMPLICON_PCI272,
336 .bustype = pci_bustype,
337 .model = pci272_model,
338 .layout = pc272_layout,
341 #ifdef CONFIG_COMEDI_PCI
343 .name = DIO200_DRIVER_NAME,
344 .devid = PCI_DEVICE_ID_INVALID,
345 .bustype = pci_bustype,
346 .model = anypci_model, /* wildcard */
352 * Layout descriptions - some ISA and PCI board descriptions share the same
356 enum dio200_sdtype { sd_none, sd_intr, sd_8255, sd_8254 };
358 #define DIO200_MAX_SUBDEVS 7
359 #define DIO200_MAX_ISNS 6
361 struct dio200_layout_struct {
362 unsigned short n_subdevs; /* number of subdevices */
363 unsigned char sdtype[DIO200_MAX_SUBDEVS]; /* enum dio200_sdtype */
364 unsigned char sdinfo[DIO200_MAX_SUBDEVS]; /* depends on sdtype */
365 char has_int_sce; /* has interrupt enable/status register */
366 char has_clk_gat_sce; /* has clock/gate selection registers */
369 static const struct dio200_layout_struct dio200_layouts[] = {
372 .sdtype = {sd_8255, sd_8254, sd_8254, sd_8254,
375 .sdinfo = {0x00, 0x08, 0x0C, 0x10, 0x14,
378 .has_clk_gat_sce = 1,
382 .sdtype = {sd_8255, sd_8255, sd_8254,
384 .sdinfo = {0x00, 0x08, 0x10, 0x01},
386 .has_clk_gat_sce = 0,
390 .sdtype = {sd_8255, sd_8255, sd_8254,
393 .sdinfo = {0x00, 0x08, 0x10, 0x14, 0x3F},
395 .has_clk_gat_sce = 1,
399 .sdtype = {sd_8254, sd_8254, sd_8255, sd_8254,
402 .sdinfo = {0x00, 0x04, 0x08, 0x0C, 0x10,
406 .has_clk_gat_sce = 1,
410 .sdtype = {sd_8255, sd_8255, sd_8255,
412 .sdinfo = {0x00, 0x08, 0x10, 0x3F},
414 .has_clk_gat_sce = 0,
422 #ifdef CONFIG_COMEDI_PCI
423 static DEFINE_PCI_DEVICE_TABLE(dio200_pci_table) = {
425 PCI_VENDOR_ID_AMPLICON, PCI_DEVICE_ID_AMPLICON_PCI215,
426 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, {
427 PCI_VENDOR_ID_AMPLICON, PCI_DEVICE_ID_AMPLICON_PCI272,
428 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, {
432 MODULE_DEVICE_TABLE(pci, dio200_pci_table);
433 #endif /* CONFIG_COMEDI_PCI */
436 * Useful for shorthand access to the particular board structure
438 #define thisboard ((const struct dio200_board *)dev->board_ptr)
439 #define thislayout (&dio200_layouts[((struct dio200_board *) \
440 dev->board_ptr)->layout])
442 /* this structure is for data unique to this hardware driver. If
443 several hardware drivers keep similar information in this structure,
444 feel free to suggest moving the variable to the struct comedi_device struct.
446 struct dio200_private {
447 #ifdef CONFIG_COMEDI_PCI
448 struct pci_dev *pci_dev; /* PCI device */
453 #define devpriv ((struct dio200_private *)dev->private)
455 struct dio200_subdev_8254 {
456 unsigned long iobase; /* Counter base address */
457 unsigned long clk_sce_iobase; /* CLK_SCE base address */
458 unsigned long gat_sce_iobase; /* GAT_SCE base address */
459 int which; /* Bit 5 of CLK_SCE or GAT_SCE */
461 unsigned clock_src[3]; /* Current clock sources */
462 unsigned gate_src[3]; /* Current gate sources */
465 struct dio200_subdev_intr {
466 unsigned long iobase;
470 unsigned int valid_isns;
471 unsigned int enabled_isns;
472 unsigned int stopcount;
477 * The struct comedi_driver structure tells the Comedi core module
478 * which functions to call to configure/deconfigure (attach/detach)
479 * the board, and also about the kernel module that contains
482 static int dio200_attach(struct comedi_device *dev,
483 struct comedi_devconfig *it);
484 static int dio200_detach(struct comedi_device *dev);
485 static struct comedi_driver driver_amplc_dio200 = {
486 .driver_name = DIO200_DRIVER_NAME,
487 .module = THIS_MODULE,
488 .attach = dio200_attach,
489 .detach = dio200_detach,
490 .board_name = &dio200_boards[0].name,
491 .offset = sizeof(struct dio200_board),
492 .num_names = ARRAY_SIZE(dio200_boards),
495 #ifdef CONFIG_COMEDI_PCI
496 COMEDI_PCI_INITCLEANUP(driver_amplc_dio200, dio200_pci_table);
498 COMEDI_INITCLEANUP(driver_amplc_dio200);
502 * This function looks for a PCI device matching the requested board name,
505 #ifdef CONFIG_COMEDI_PCI
507 dio200_find_pci(struct comedi_device *dev, int bus, int slot,
508 struct pci_dev **pci_dev_p)
510 struct pci_dev *pci_dev = NULL;
514 /* Look for matching PCI device. */
515 for (pci_dev = pci_get_device(PCI_VENDOR_ID_AMPLICON, PCI_ANY_ID, NULL);
517 pci_dev = pci_get_device(PCI_VENDOR_ID_AMPLICON,
518 PCI_ANY_ID, pci_dev)) {
519 /* If bus/slot specified, check them. */
521 if (bus != pci_dev->bus->number
522 || slot != PCI_SLOT(pci_dev->devfn))
525 if (thisboard->model == anypci_model) {
526 /* Match any supported model. */
529 for (i = 0; i < ARRAY_SIZE(dio200_boards); i++) {
530 if (dio200_boards[i].bustype != pci_bustype)
532 if (pci_dev->device == dio200_boards[i].devid) {
533 /* Change board_ptr to matched board. */
534 dev->board_ptr = &dio200_boards[i];
538 if (i == ARRAY_SIZE(dio200_boards))
541 /* Match specific model name. */
542 if (pci_dev->device != thisboard->devid)
547 *pci_dev_p = pci_dev;
550 /* No match found. */
553 "comedi%d: error! no %s found at pci %02x:%02x!\n",
554 dev->minor, thisboard->name, bus, slot);
556 printk(KERN_ERR "comedi%d: error! no %s found!\n",
557 dev->minor, thisboard->name);
564 * This function checks and requests an I/O region, reporting an error
565 * if there is a conflict.
568 dio200_request_region(unsigned minor, unsigned long from, unsigned long extent)
570 if (!from || !request_region(from, extent, DIO200_DRIVER_NAME)) {
571 printk(KERN_ERR "comedi%d: I/O port conflict (%#lx,%lu)!\n",
572 minor, from, extent);
579 * 'insn_bits' function for an 'INTERRUPT' subdevice.
582 dio200_subdev_intr_insn_bits(struct comedi_device *dev,
583 struct comedi_subdevice *s,
584 struct comedi_insn *insn, unsigned int *data)
586 struct dio200_subdev_intr *subpriv = s->private;
588 if (subpriv->has_int_sce) {
589 /* Just read the interrupt status register. */
590 data[1] = inb(subpriv->iobase) & subpriv->valid_isns;
592 /* No interrupt status register. */
600 * Called to stop acquisition for an 'INTERRUPT' subdevice.
602 static void dio200_stop_intr(struct comedi_device *dev,
603 struct comedi_subdevice *s)
605 struct dio200_subdev_intr *subpriv = s->private;
608 subpriv->enabled_isns = 0;
609 if (subpriv->has_int_sce)
610 outb(0, subpriv->iobase);
614 * Called to start acquisition for an 'INTERRUPT' subdevice.
616 static int dio200_start_intr(struct comedi_device *dev,
617 struct comedi_subdevice *s)
621 struct dio200_subdev_intr *subpriv = s->private;
622 struct comedi_cmd *cmd = &s->async->cmd;
625 if (!subpriv->continuous && subpriv->stopcount == 0) {
626 /* An empty acquisition! */
627 s->async->events |= COMEDI_CB_EOA;
631 /* Determine interrupt sources to enable. */
634 for (n = 0; n < cmd->chanlist_len; n++)
635 isn_bits |= (1U << CR_CHAN(cmd->chanlist[n]));
637 isn_bits &= subpriv->valid_isns;
638 /* Enable interrupt sources. */
639 subpriv->enabled_isns = isn_bits;
640 if (subpriv->has_int_sce)
641 outb(isn_bits, subpriv->iobase);
648 * Internal trigger function to start acquisition for an 'INTERRUPT' subdevice.
651 dio200_inttrig_start_intr(struct comedi_device *dev, struct comedi_subdevice *s,
652 unsigned int trignum)
654 struct dio200_subdev_intr *subpriv;
661 subpriv = s->private;
663 spin_lock_irqsave(&subpriv->spinlock, flags);
664 s->async->inttrig = 0;
666 event = dio200_start_intr(dev, s);
668 spin_unlock_irqrestore(&subpriv->spinlock, flags);
671 comedi_event(dev, s);
677 * This is called from the interrupt service routine to handle a read
678 * scan on an 'INTERRUPT' subdevice.
680 static int dio200_handle_read_intr(struct comedi_device *dev,
681 struct comedi_subdevice *s)
683 struct dio200_subdev_intr *subpriv = s->private;
686 unsigned cur_enabled;
687 unsigned int oldevents;
692 spin_lock_irqsave(&subpriv->spinlock, flags);
693 oldevents = s->async->events;
694 if (subpriv->has_int_sce) {
696 * Collect interrupt sources that have triggered and disable
697 * them temporarily. Loop around until no extra interrupt
698 * sources have triggered, at which point, the valid part of
699 * the interrupt status register will read zero, clearing the
700 * cause of the interrupt.
702 * Mask off interrupt sources already seen to avoid infinite
703 * loop in case of misconfiguration.
705 cur_enabled = subpriv->enabled_isns;
706 while ((intstat = (inb(subpriv->iobase) & subpriv->valid_isns
707 & ~triggered)) != 0) {
708 triggered |= intstat;
709 cur_enabled &= ~triggered;
710 outb(cur_enabled, subpriv->iobase);
714 * No interrupt status register. Assume the single interrupt
715 * source has triggered.
717 triggered = subpriv->enabled_isns;
722 * Some interrupt sources have triggered and have been
723 * temporarily disabled to clear the cause of the interrupt.
725 * Reenable them NOW to minimize the time they are disabled.
727 cur_enabled = subpriv->enabled_isns;
728 if (subpriv->has_int_sce)
729 outb(cur_enabled, subpriv->iobase);
731 if (subpriv->active) {
733 * The command is still active.
735 * Ignore interrupt sources that the command isn't
736 * interested in (just in case there's a race
739 if (triggered & subpriv->enabled_isns) {
740 /* Collect scan data. */
742 unsigned int n, ch, len;
745 len = s->async->cmd.chanlist_len;
746 for (n = 0; n < len; n++) {
747 ch = CR_CHAN(s->async->cmd.chanlist[n]);
748 if (triggered & (1U << ch))
751 /* Write the scan to the buffer. */
752 if (comedi_buf_put(s->async, val)) {
753 s->async->events |= (COMEDI_CB_BLOCK |
756 /* Error! Stop acquisition. */
757 dio200_stop_intr(dev, s);
758 s->async->events |= COMEDI_CB_ERROR
759 | COMEDI_CB_OVERFLOW;
760 comedi_error(dev, "buffer overflow");
763 /* Check for end of acquisition. */
764 if (!subpriv->continuous) {
765 /* stop_src == TRIG_COUNT */
766 if (subpriv->stopcount > 0) {
767 subpriv->stopcount--;
768 if (subpriv->stopcount == 0) {
771 dio200_stop_intr(dev,
779 spin_unlock_irqrestore(&subpriv->spinlock, flags);
781 if (oldevents != s->async->events)
782 comedi_event(dev, s);
784 return (triggered != 0);
788 * 'cancel' function for an 'INTERRUPT' subdevice.
790 static int dio200_subdev_intr_cancel(struct comedi_device *dev,
791 struct comedi_subdevice *s)
793 struct dio200_subdev_intr *subpriv = s->private;
796 spin_lock_irqsave(&subpriv->spinlock, flags);
798 dio200_stop_intr(dev, s);
800 spin_unlock_irqrestore(&subpriv->spinlock, flags);
806 * 'do_cmdtest' function for an 'INTERRUPT' subdevice.
809 dio200_subdev_intr_cmdtest(struct comedi_device *dev,
810 struct comedi_subdevice *s, struct comedi_cmd *cmd)
815 /* step 1: make sure trigger sources are trivially valid */
817 tmp = cmd->start_src;
818 cmd->start_src &= (TRIG_NOW | TRIG_INT);
819 if (!cmd->start_src || tmp != cmd->start_src)
822 tmp = cmd->scan_begin_src;
823 cmd->scan_begin_src &= TRIG_EXT;
824 if (!cmd->scan_begin_src || tmp != cmd->scan_begin_src)
827 tmp = cmd->convert_src;
828 cmd->convert_src &= TRIG_NOW;
829 if (!cmd->convert_src || tmp != cmd->convert_src)
832 tmp = cmd->scan_end_src;
833 cmd->scan_end_src &= TRIG_COUNT;
834 if (!cmd->scan_end_src || tmp != cmd->scan_end_src)
838 cmd->stop_src &= (TRIG_COUNT | TRIG_NONE);
839 if (!cmd->stop_src || tmp != cmd->stop_src)
845 /* step 2: make sure trigger sources are unique and mutually
848 /* these tests are true if more than one _src bit is set */
849 if ((cmd->start_src & (cmd->start_src - 1)) != 0)
851 if ((cmd->scan_begin_src & (cmd->scan_begin_src - 1)) != 0)
853 if ((cmd->convert_src & (cmd->convert_src - 1)) != 0)
855 if ((cmd->scan_end_src & (cmd->scan_end_src - 1)) != 0)
857 if ((cmd->stop_src & (cmd->stop_src - 1)) != 0)
863 /* step 3: make sure arguments are trivially compatible */
865 /* cmd->start_src == TRIG_NOW || cmd->start_src == TRIG_INT */
866 if (cmd->start_arg != 0) {
871 /* cmd->scan_begin_src == TRIG_EXT */
872 if (cmd->scan_begin_arg != 0) {
873 cmd->scan_begin_arg = 0;
877 /* cmd->convert_src == TRIG_NOW */
878 if (cmd->convert_arg != 0) {
879 cmd->convert_arg = 0;
883 /* cmd->scan_end_src == TRIG_COUNT */
884 if (cmd->scan_end_arg != cmd->chanlist_len) {
885 cmd->scan_end_arg = cmd->chanlist_len;
889 switch (cmd->stop_src) {
891 /* any count allowed */
894 if (cmd->stop_arg != 0) {
906 /* step 4: fix up any arguments */
908 /* if (err) return 4; */
914 * 'do_cmd' function for an 'INTERRUPT' subdevice.
916 static int dio200_subdev_intr_cmd(struct comedi_device *dev,
917 struct comedi_subdevice *s)
919 struct comedi_cmd *cmd = &s->async->cmd;
920 struct dio200_subdev_intr *subpriv = s->private;
924 spin_lock_irqsave(&subpriv->spinlock, flags);
927 /* Set up end of acquisition. */
928 switch (cmd->stop_src) {
930 subpriv->continuous = 0;
931 subpriv->stopcount = cmd->stop_arg;
935 subpriv->continuous = 1;
936 subpriv->stopcount = 0;
940 /* Set up start of acquisition. */
941 switch (cmd->start_src) {
943 s->async->inttrig = dio200_inttrig_start_intr;
947 event = dio200_start_intr(dev, s);
950 spin_unlock_irqrestore(&subpriv->spinlock, flags);
953 comedi_event(dev, s);
959 * This function initializes an 'INTERRUPT' subdevice.
962 dio200_subdev_intr_init(struct comedi_device *dev, struct comedi_subdevice *s,
963 unsigned long iobase, unsigned valid_isns,
966 struct dio200_subdev_intr *subpriv;
968 subpriv = kzalloc(sizeof(*subpriv), GFP_KERNEL);
970 printk(KERN_ERR "comedi%d: error! out of memory!\n",
974 subpriv->iobase = iobase;
975 subpriv->has_int_sce = has_int_sce;
976 subpriv->valid_isns = valid_isns;
977 spin_lock_init(&subpriv->spinlock);
980 outb(0, subpriv->iobase); /* Disable interrupt sources. */
982 s->private = subpriv;
983 s->type = COMEDI_SUBD_DI;
984 s->subdev_flags = SDF_READABLE | SDF_CMD_READ;
986 s->n_chan = DIO200_MAX_ISNS;
987 s->len_chanlist = DIO200_MAX_ISNS;
989 /* No interrupt source register. Support single channel. */
993 s->range_table = &range_digital;
995 s->insn_bits = dio200_subdev_intr_insn_bits;
996 s->do_cmdtest = dio200_subdev_intr_cmdtest;
997 s->do_cmd = dio200_subdev_intr_cmd;
998 s->cancel = dio200_subdev_intr_cancel;
1004 * This function cleans up an 'INTERRUPT' subdevice.
1007 dio200_subdev_intr_cleanup(struct comedi_device *dev,
1008 struct comedi_subdevice *s)
1010 struct dio200_subdev_intr *subpriv = s->private;
1015 * Interrupt service routine.
1017 static irqreturn_t dio200_interrupt(int irq, void *d)
1019 struct comedi_device *dev = d;
1025 if (devpriv->intr_sd >= 0) {
1026 handled = dio200_handle_read_intr(dev,
1033 return IRQ_RETVAL(handled);
1037 * Handle 'insn_read' for an '8254' counter subdevice.
1040 dio200_subdev_8254_read(struct comedi_device *dev, struct comedi_subdevice *s,
1041 struct comedi_insn *insn, unsigned int *data)
1043 struct dio200_subdev_8254 *subpriv = s->private;
1044 int chan = CR_CHAN(insn->chanspec);
1046 data[0] = i8254_read(subpriv->iobase, 0, chan);
1052 * Handle 'insn_write' for an '8254' counter subdevice.
1055 dio200_subdev_8254_write(struct comedi_device *dev, struct comedi_subdevice *s,
1056 struct comedi_insn *insn, unsigned int *data)
1058 struct dio200_subdev_8254 *subpriv = s->private;
1059 int chan = CR_CHAN(insn->chanspec);
1061 i8254_write(subpriv->iobase, 0, chan, data[0]);
1067 * Set gate source for an '8254' counter subdevice channel.
1070 dio200_set_gate_src(struct dio200_subdev_8254 *subpriv,
1071 unsigned int counter_number, unsigned int gate_src)
1075 if (!subpriv->has_clk_gat_sce)
1077 if (counter_number > 2)
1082 subpriv->gate_src[counter_number] = gate_src;
1083 byte = GAT_SCE(subpriv->which, counter_number, gate_src);
1084 outb(byte, subpriv->gat_sce_iobase);
1090 * Get gate source for an '8254' counter subdevice channel.
1093 dio200_get_gate_src(struct dio200_subdev_8254 *subpriv,
1094 unsigned int counter_number)
1096 if (!subpriv->has_clk_gat_sce)
1098 if (counter_number > 2)
1101 return subpriv->gate_src[counter_number];
1105 * Set clock source for an '8254' counter subdevice channel.
1108 dio200_set_clock_src(struct dio200_subdev_8254 *subpriv,
1109 unsigned int counter_number, unsigned int clock_src)
1113 if (!subpriv->has_clk_gat_sce)
1115 if (counter_number > 2)
1120 subpriv->clock_src[counter_number] = clock_src;
1121 byte = CLK_SCE(subpriv->which, counter_number, clock_src);
1122 outb(byte, subpriv->clk_sce_iobase);
1128 * Get clock source for an '8254' counter subdevice channel.
1131 dio200_get_clock_src(struct dio200_subdev_8254 *subpriv,
1132 unsigned int counter_number, unsigned int *period_ns)
1136 if (!subpriv->has_clk_gat_sce)
1138 if (counter_number > 2)
1141 clock_src = subpriv->clock_src[counter_number];
1142 *period_ns = clock_period[clock_src];
1147 * Handle 'insn_config' for an '8254' counter subdevice.
1150 dio200_subdev_8254_config(struct comedi_device *dev, struct comedi_subdevice *s,
1151 struct comedi_insn *insn, unsigned int *data)
1153 struct dio200_subdev_8254 *subpriv = s->private;
1155 int chan = CR_CHAN(insn->chanspec);
1158 case INSN_CONFIG_SET_COUNTER_MODE:
1159 ret = i8254_set_mode(subpriv->iobase, 0, chan, data[1]);
1163 case INSN_CONFIG_8254_READ_STATUS:
1164 data[1] = i8254_status(subpriv->iobase, 0, chan);
1166 case INSN_CONFIG_SET_GATE_SRC:
1167 ret = dio200_set_gate_src(subpriv, chan, data[2]);
1171 case INSN_CONFIG_GET_GATE_SRC:
1172 ret = dio200_get_gate_src(subpriv, chan);
1177 case INSN_CONFIG_SET_CLOCK_SRC:
1178 ret = dio200_set_clock_src(subpriv, chan, data[1]);
1182 case INSN_CONFIG_GET_CLOCK_SRC:
1183 ret = dio200_get_clock_src(subpriv, chan, &data[2]);
1196 * This function initializes an '8254' counter subdevice.
1198 * Note: iobase is the base address of the board, not the subdevice;
1199 * offset is the offset to the 8254 chip.
1202 dio200_subdev_8254_init(struct comedi_device *dev, struct comedi_subdevice *s,
1203 unsigned long iobase, unsigned offset,
1204 int has_clk_gat_sce)
1206 struct dio200_subdev_8254 *subpriv;
1209 subpriv = kzalloc(sizeof(*subpriv), GFP_KERNEL);
1211 printk(KERN_ERR "comedi%d: error! out of memory!\n",
1216 s->private = subpriv;
1217 s->type = COMEDI_SUBD_COUNTER;
1218 s->subdev_flags = SDF_WRITABLE | SDF_READABLE;
1220 s->maxdata = 0xFFFF;
1221 s->insn_read = dio200_subdev_8254_read;
1222 s->insn_write = dio200_subdev_8254_write;
1223 s->insn_config = dio200_subdev_8254_config;
1225 subpriv->iobase = offset + iobase;
1226 subpriv->has_clk_gat_sce = has_clk_gat_sce;
1227 if (has_clk_gat_sce) {
1228 /* Derive CLK_SCE and GAT_SCE register offsets from
1230 subpriv->clk_sce_iobase =
1231 DIO200_XCLK_SCE + (offset >> 3) + iobase;
1232 subpriv->gat_sce_iobase =
1233 DIO200_XGAT_SCE + (offset >> 3) + iobase;
1234 subpriv->which = (offset >> 2) & 1;
1237 /* Initialize channels. */
1238 for (chan = 0; chan < 3; chan++) {
1239 i8254_set_mode(subpriv->iobase, 0, chan,
1240 I8254_MODE0 | I8254_BINARY);
1241 if (subpriv->has_clk_gat_sce) {
1242 /* Gate source 0 is VCC (logic 1). */
1243 dio200_set_gate_src(subpriv, chan, 0);
1244 /* Clock source 0 is the dedicated clock input. */
1245 dio200_set_clock_src(subpriv, chan, 0);
1253 * This function cleans up an '8254' counter subdevice.
1256 dio200_subdev_8254_cleanup(struct comedi_device *dev,
1257 struct comedi_subdevice *s)
1259 struct dio200_subdev_intr *subpriv = s->private;
1264 * Attach is called by the Comedi core to configure the driver
1265 * for a particular board. If you specified a board_name array
1266 * in the driver structure, dev->board_ptr contains that
1269 static int dio200_attach(struct comedi_device *dev, struct comedi_devconfig *it)
1271 struct comedi_subdevice *s;
1272 unsigned long iobase = 0;
1273 unsigned int irq = 0;
1274 #ifdef CONFIG_COMEDI_PCI
1275 struct pci_dev *pci_dev = NULL;
1276 int bus = 0, slot = 0;
1278 const struct dio200_layout_struct *layout;
1284 printk(KERN_DEBUG "comedi%d: %s: attach\n", dev->minor,
1285 DIO200_DRIVER_NAME);
1287 ret = alloc_private(dev, sizeof(struct dio200_private));
1289 printk(KERN_ERR "comedi%d: error! out of memory!\n",
1294 /* Process options. */
1295 switch (thisboard->bustype) {
1297 iobase = it->options[0];
1298 irq = it->options[1];
1301 #ifdef CONFIG_COMEDI_PCI
1303 bus = it->options[0];
1304 slot = it->options[1];
1307 ret = dio200_find_pci(dev, bus, slot, &pci_dev);
1310 devpriv->pci_dev = pci_dev;
1315 "comedi%d: %s: BUG! cannot determine board type!\n",
1316 dev->minor, DIO200_DRIVER_NAME);
1321 devpriv->intr_sd = -1;
1323 /* Enable device and reserve I/O spaces. */
1324 #ifdef CONFIG_COMEDI_PCI
1326 ret = comedi_pci_enable(pci_dev, DIO200_DRIVER_NAME);
1329 "comedi%d: error! cannot enable PCI device and request regions!\n",
1333 iobase = pci_resource_start(pci_dev, 2);
1338 ret = dio200_request_region(dev->minor, iobase, DIO200_IO_SIZE);
1342 dev->iobase = iobase;
1344 layout = thislayout;
1346 ret = alloc_subdevices(dev, layout->n_subdevs);
1348 printk(KERN_ERR "comedi%d: error! out of memory!\n",
1353 for (n = 0; n < dev->n_subdevices; n++) {
1354 s = &dev->subdevices[n];
1355 switch (layout->sdtype[n]) {
1357 /* counter subdevice (8254) */
1358 ret = dio200_subdev_8254_init(dev, s, iobase,
1360 layout->has_clk_gat_sce);
1366 /* digital i/o subdevice (8255) */
1367 ret = subdev_8255_init(dev, s, 0,
1368 iobase + layout->sdinfo[n]);
1374 /* 'INTERRUPT' subdevice */
1376 ret = dio200_subdev_intr_init(dev, s,
1385 devpriv->intr_sd = n;
1387 s->type = COMEDI_SUBD_UNUSED;
1391 s->type = COMEDI_SUBD_UNUSED;
1396 sdx = devpriv->intr_sd;
1397 if (sdx >= 0 && sdx < dev->n_subdevices)
1398 dev->read_subdev = &dev->subdevices[sdx];
1400 dev->board_name = thisboard->name;
1403 unsigned long flags = share_irq ? IRQF_SHARED : 0;
1405 if (request_irq(irq, dio200_interrupt, flags,
1406 DIO200_DRIVER_NAME, dev) >= 0) {
1410 "comedi%d: warning! irq %u unavailable!\n",
1415 printk(KERN_INFO "comedi%d: %s ", dev->minor, dev->board_name);
1416 if (thisboard->bustype == isa_bustype) {
1417 printk("(base %#lx) ", iobase);
1419 #ifdef CONFIG_COMEDI_PCI
1420 printk("(pci %s) ", pci_name(pci_dev));
1424 printk("(irq %u%s) ", irq, (dev->irq ? "" : " UNAVAILABLE"));
1426 printk("(no irq) ");
1428 printk("attached\n");
1434 * _detach is called to deconfigure a device. It should deallocate
1436 * This function is also called when _attach() fails, so it should be
1437 * careful not to release resources that were not necessarily
1438 * allocated by _attach(). dev->private and dev->subdevices are
1439 * deallocated automatically by the core.
1441 static int dio200_detach(struct comedi_device *dev)
1443 const struct dio200_layout_struct *layout;
1446 printk(KERN_DEBUG "comedi%d: %s: detach\n", dev->minor,
1447 DIO200_DRIVER_NAME);
1450 free_irq(dev->irq, dev);
1451 if (dev->subdevices) {
1452 layout = thislayout;
1453 for (n = 0; n < dev->n_subdevices; n++) {
1454 struct comedi_subdevice *s = &dev->subdevices[n];
1455 switch (layout->sdtype[n]) {
1457 dio200_subdev_8254_cleanup(dev, s);
1460 subdev_8255_cleanup(dev, s);
1463 dio200_subdev_intr_cleanup(dev, s);
1471 #ifdef CONFIG_COMEDI_PCI
1472 if (devpriv->pci_dev) {
1474 comedi_pci_disable(devpriv->pci_dev);
1475 pci_dev_put(devpriv->pci_dev);
1480 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);