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 */
466 struct dio200_subdev_intr {
467 unsigned long iobase;
471 unsigned int valid_isns;
472 unsigned int enabled_isns;
473 unsigned int stopcount;
478 * The struct comedi_driver structure tells the Comedi core module
479 * which functions to call to configure/deconfigure (attach/detach)
480 * the board, and also about the kernel module that contains
483 static int dio200_attach(struct comedi_device *dev,
484 struct comedi_devconfig *it);
485 static int dio200_detach(struct comedi_device *dev);
486 static struct comedi_driver driver_amplc_dio200 = {
487 .driver_name = DIO200_DRIVER_NAME,
488 .module = THIS_MODULE,
489 .attach = dio200_attach,
490 .detach = dio200_detach,
491 .board_name = &dio200_boards[0].name,
492 .offset = sizeof(struct dio200_board),
493 .num_names = ARRAY_SIZE(dio200_boards),
496 #ifdef CONFIG_COMEDI_PCI
497 COMEDI_PCI_INITCLEANUP(driver_amplc_dio200, dio200_pci_table);
499 static int __init driver_amplc_dio200_init_module(void)
501 return comedi_driver_register(&driver_amplc_dio200);
504 static void __exit driver_amplc_dio200_cleanup_module(void)
506 comedi_driver_unregister(&driver_amplc_dio200);
509 module_init(driver_amplc_dio200_init_module);
510 module_exit(driver_amplc_dio200_cleanup_module);
514 * This function looks for a PCI device matching the requested board name,
517 #ifdef CONFIG_COMEDI_PCI
519 dio200_find_pci(struct comedi_device *dev, int bus, int slot,
520 struct pci_dev **pci_dev_p)
522 struct pci_dev *pci_dev = NULL;
526 /* Look for matching PCI device. */
527 for (pci_dev = pci_get_device(PCI_VENDOR_ID_AMPLICON, PCI_ANY_ID, NULL);
529 pci_dev = pci_get_device(PCI_VENDOR_ID_AMPLICON,
530 PCI_ANY_ID, pci_dev)) {
531 /* If bus/slot specified, check them. */
533 if (bus != pci_dev->bus->number
534 || slot != PCI_SLOT(pci_dev->devfn))
537 if (thisboard->model == anypci_model) {
538 /* Match any supported model. */
541 for (i = 0; i < ARRAY_SIZE(dio200_boards); i++) {
542 if (dio200_boards[i].bustype != pci_bustype)
544 if (pci_dev->device == dio200_boards[i].devid) {
545 /* Change board_ptr to matched board. */
546 dev->board_ptr = &dio200_boards[i];
550 if (i == ARRAY_SIZE(dio200_boards))
553 /* Match specific model name. */
554 if (pci_dev->device != thisboard->devid)
559 *pci_dev_p = pci_dev;
562 /* No match found. */
565 "comedi%d: error! no %s found at pci %02x:%02x!\n",
566 dev->minor, thisboard->name, bus, slot);
568 printk(KERN_ERR "comedi%d: error! no %s found!\n",
569 dev->minor, thisboard->name);
576 * This function checks and requests an I/O region, reporting an error
577 * if there is a conflict.
580 dio200_request_region(unsigned minor, unsigned long from, unsigned long extent)
582 if (!from || !request_region(from, extent, DIO200_DRIVER_NAME)) {
583 printk(KERN_ERR "comedi%d: I/O port conflict (%#lx,%lu)!\n",
584 minor, from, extent);
591 * 'insn_bits' function for an 'INTERRUPT' subdevice.
594 dio200_subdev_intr_insn_bits(struct comedi_device *dev,
595 struct comedi_subdevice *s,
596 struct comedi_insn *insn, unsigned int *data)
598 struct dio200_subdev_intr *subpriv = s->private;
600 if (subpriv->has_int_sce) {
601 /* Just read the interrupt status register. */
602 data[1] = inb(subpriv->iobase) & subpriv->valid_isns;
604 /* No interrupt status register. */
612 * Called to stop acquisition for an 'INTERRUPT' subdevice.
614 static void dio200_stop_intr(struct comedi_device *dev,
615 struct comedi_subdevice *s)
617 struct dio200_subdev_intr *subpriv = s->private;
620 subpriv->enabled_isns = 0;
621 if (subpriv->has_int_sce)
622 outb(0, subpriv->iobase);
626 * Called to start acquisition for an 'INTERRUPT' subdevice.
628 static int dio200_start_intr(struct comedi_device *dev,
629 struct comedi_subdevice *s)
633 struct dio200_subdev_intr *subpriv = s->private;
634 struct comedi_cmd *cmd = &s->async->cmd;
637 if (!subpriv->continuous && subpriv->stopcount == 0) {
638 /* An empty acquisition! */
639 s->async->events |= COMEDI_CB_EOA;
643 /* Determine interrupt sources to enable. */
646 for (n = 0; n < cmd->chanlist_len; n++)
647 isn_bits |= (1U << CR_CHAN(cmd->chanlist[n]));
649 isn_bits &= subpriv->valid_isns;
650 /* Enable interrupt sources. */
651 subpriv->enabled_isns = isn_bits;
652 if (subpriv->has_int_sce)
653 outb(isn_bits, subpriv->iobase);
660 * Internal trigger function to start acquisition for an 'INTERRUPT' subdevice.
663 dio200_inttrig_start_intr(struct comedi_device *dev, struct comedi_subdevice *s,
664 unsigned int trignum)
666 struct dio200_subdev_intr *subpriv;
673 subpriv = s->private;
675 spin_lock_irqsave(&subpriv->spinlock, flags);
676 s->async->inttrig = NULL;
678 event = dio200_start_intr(dev, s);
680 spin_unlock_irqrestore(&subpriv->spinlock, flags);
683 comedi_event(dev, s);
689 * This is called from the interrupt service routine to handle a read
690 * scan on an 'INTERRUPT' subdevice.
692 static int dio200_handle_read_intr(struct comedi_device *dev,
693 struct comedi_subdevice *s)
695 struct dio200_subdev_intr *subpriv = s->private;
698 unsigned cur_enabled;
699 unsigned int oldevents;
704 spin_lock_irqsave(&subpriv->spinlock, flags);
705 oldevents = s->async->events;
706 if (subpriv->has_int_sce) {
708 * Collect interrupt sources that have triggered and disable
709 * them temporarily. Loop around until no extra interrupt
710 * sources have triggered, at which point, the valid part of
711 * the interrupt status register will read zero, clearing the
712 * cause of the interrupt.
714 * Mask off interrupt sources already seen to avoid infinite
715 * loop in case of misconfiguration.
717 cur_enabled = subpriv->enabled_isns;
718 while ((intstat = (inb(subpriv->iobase) & subpriv->valid_isns
719 & ~triggered)) != 0) {
720 triggered |= intstat;
721 cur_enabled &= ~triggered;
722 outb(cur_enabled, subpriv->iobase);
726 * No interrupt status register. Assume the single interrupt
727 * source has triggered.
729 triggered = subpriv->enabled_isns;
734 * Some interrupt sources have triggered and have been
735 * temporarily disabled to clear the cause of the interrupt.
737 * Reenable them NOW to minimize the time they are disabled.
739 cur_enabled = subpriv->enabled_isns;
740 if (subpriv->has_int_sce)
741 outb(cur_enabled, subpriv->iobase);
743 if (subpriv->active) {
745 * The command is still active.
747 * Ignore interrupt sources that the command isn't
748 * interested in (just in case there's a race
751 if (triggered & subpriv->enabled_isns) {
752 /* Collect scan data. */
754 unsigned int n, ch, len;
757 len = s->async->cmd.chanlist_len;
758 for (n = 0; n < len; n++) {
759 ch = CR_CHAN(s->async->cmd.chanlist[n]);
760 if (triggered & (1U << ch))
763 /* Write the scan to the buffer. */
764 if (comedi_buf_put(s->async, val)) {
765 s->async->events |= (COMEDI_CB_BLOCK |
768 /* Error! Stop acquisition. */
769 dio200_stop_intr(dev, s);
770 s->async->events |= COMEDI_CB_ERROR
771 | COMEDI_CB_OVERFLOW;
772 comedi_error(dev, "buffer overflow");
775 /* Check for end of acquisition. */
776 if (!subpriv->continuous) {
777 /* stop_src == TRIG_COUNT */
778 if (subpriv->stopcount > 0) {
779 subpriv->stopcount--;
780 if (subpriv->stopcount == 0) {
783 dio200_stop_intr(dev,
791 spin_unlock_irqrestore(&subpriv->spinlock, flags);
793 if (oldevents != s->async->events)
794 comedi_event(dev, s);
796 return (triggered != 0);
800 * 'cancel' function for an 'INTERRUPT' subdevice.
802 static int dio200_subdev_intr_cancel(struct comedi_device *dev,
803 struct comedi_subdevice *s)
805 struct dio200_subdev_intr *subpriv = s->private;
808 spin_lock_irqsave(&subpriv->spinlock, flags);
810 dio200_stop_intr(dev, s);
812 spin_unlock_irqrestore(&subpriv->spinlock, flags);
818 * 'do_cmdtest' function for an 'INTERRUPT' subdevice.
821 dio200_subdev_intr_cmdtest(struct comedi_device *dev,
822 struct comedi_subdevice *s, struct comedi_cmd *cmd)
827 /* step 1: make sure trigger sources are trivially valid */
829 tmp = cmd->start_src;
830 cmd->start_src &= (TRIG_NOW | TRIG_INT);
831 if (!cmd->start_src || tmp != cmd->start_src)
834 tmp = cmd->scan_begin_src;
835 cmd->scan_begin_src &= TRIG_EXT;
836 if (!cmd->scan_begin_src || tmp != cmd->scan_begin_src)
839 tmp = cmd->convert_src;
840 cmd->convert_src &= TRIG_NOW;
841 if (!cmd->convert_src || tmp != cmd->convert_src)
844 tmp = cmd->scan_end_src;
845 cmd->scan_end_src &= TRIG_COUNT;
846 if (!cmd->scan_end_src || tmp != cmd->scan_end_src)
850 cmd->stop_src &= (TRIG_COUNT | TRIG_NONE);
851 if (!cmd->stop_src || tmp != cmd->stop_src)
857 /* step 2: make sure trigger sources are unique and mutually
860 /* these tests are true if more than one _src bit is set */
861 if ((cmd->start_src & (cmd->start_src - 1)) != 0)
863 if ((cmd->scan_begin_src & (cmd->scan_begin_src - 1)) != 0)
865 if ((cmd->convert_src & (cmd->convert_src - 1)) != 0)
867 if ((cmd->scan_end_src & (cmd->scan_end_src - 1)) != 0)
869 if ((cmd->stop_src & (cmd->stop_src - 1)) != 0)
875 /* step 3: make sure arguments are trivially compatible */
877 /* cmd->start_src == TRIG_NOW || cmd->start_src == TRIG_INT */
878 if (cmd->start_arg != 0) {
883 /* cmd->scan_begin_src == TRIG_EXT */
884 if (cmd->scan_begin_arg != 0) {
885 cmd->scan_begin_arg = 0;
889 /* cmd->convert_src == TRIG_NOW */
890 if (cmd->convert_arg != 0) {
891 cmd->convert_arg = 0;
895 /* cmd->scan_end_src == TRIG_COUNT */
896 if (cmd->scan_end_arg != cmd->chanlist_len) {
897 cmd->scan_end_arg = cmd->chanlist_len;
901 switch (cmd->stop_src) {
903 /* any count allowed */
906 if (cmd->stop_arg != 0) {
918 /* step 4: fix up any arguments */
920 /* if (err) return 4; */
926 * 'do_cmd' function for an 'INTERRUPT' subdevice.
928 static int dio200_subdev_intr_cmd(struct comedi_device *dev,
929 struct comedi_subdevice *s)
931 struct comedi_cmd *cmd = &s->async->cmd;
932 struct dio200_subdev_intr *subpriv = s->private;
936 spin_lock_irqsave(&subpriv->spinlock, flags);
939 /* Set up end of acquisition. */
940 switch (cmd->stop_src) {
942 subpriv->continuous = 0;
943 subpriv->stopcount = cmd->stop_arg;
947 subpriv->continuous = 1;
948 subpriv->stopcount = 0;
952 /* Set up start of acquisition. */
953 switch (cmd->start_src) {
955 s->async->inttrig = dio200_inttrig_start_intr;
959 event = dio200_start_intr(dev, s);
962 spin_unlock_irqrestore(&subpriv->spinlock, flags);
965 comedi_event(dev, s);
971 * This function initializes an 'INTERRUPT' subdevice.
974 dio200_subdev_intr_init(struct comedi_device *dev, struct comedi_subdevice *s,
975 unsigned long iobase, unsigned valid_isns,
978 struct dio200_subdev_intr *subpriv;
980 subpriv = kzalloc(sizeof(*subpriv), GFP_KERNEL);
982 printk(KERN_ERR "comedi%d: error! out of memory!\n",
986 subpriv->iobase = iobase;
987 subpriv->has_int_sce = has_int_sce;
988 subpriv->valid_isns = valid_isns;
989 spin_lock_init(&subpriv->spinlock);
992 outb(0, subpriv->iobase); /* Disable interrupt sources. */
994 s->private = subpriv;
995 s->type = COMEDI_SUBD_DI;
996 s->subdev_flags = SDF_READABLE | SDF_CMD_READ;
998 s->n_chan = DIO200_MAX_ISNS;
999 s->len_chanlist = DIO200_MAX_ISNS;
1001 /* No interrupt source register. Support single channel. */
1003 s->len_chanlist = 1;
1005 s->range_table = &range_digital;
1007 s->insn_bits = dio200_subdev_intr_insn_bits;
1008 s->do_cmdtest = dio200_subdev_intr_cmdtest;
1009 s->do_cmd = dio200_subdev_intr_cmd;
1010 s->cancel = dio200_subdev_intr_cancel;
1016 * This function cleans up an 'INTERRUPT' subdevice.
1019 dio200_subdev_intr_cleanup(struct comedi_device *dev,
1020 struct comedi_subdevice *s)
1022 struct dio200_subdev_intr *subpriv = s->private;
1027 * Interrupt service routine.
1029 static irqreturn_t dio200_interrupt(int irq, void *d)
1031 struct comedi_device *dev = d;
1037 if (devpriv->intr_sd >= 0) {
1038 handled = dio200_handle_read_intr(dev,
1045 return IRQ_RETVAL(handled);
1049 * Handle 'insn_read' for an '8254' counter subdevice.
1052 dio200_subdev_8254_read(struct comedi_device *dev, struct comedi_subdevice *s,
1053 struct comedi_insn *insn, unsigned int *data)
1055 struct dio200_subdev_8254 *subpriv = s->private;
1056 int chan = CR_CHAN(insn->chanspec);
1057 unsigned long flags;
1059 spin_lock_irqsave(&subpriv->spinlock, flags);
1060 data[0] = i8254_read(subpriv->iobase, 0, chan);
1061 spin_unlock_irqrestore(&subpriv->spinlock, flags);
1067 * Handle 'insn_write' for an '8254' counter subdevice.
1070 dio200_subdev_8254_write(struct comedi_device *dev, struct comedi_subdevice *s,
1071 struct comedi_insn *insn, unsigned int *data)
1073 struct dio200_subdev_8254 *subpriv = s->private;
1074 int chan = CR_CHAN(insn->chanspec);
1075 unsigned long flags;
1077 spin_lock_irqsave(&subpriv->spinlock, flags);
1078 i8254_write(subpriv->iobase, 0, chan, data[0]);
1079 spin_unlock_irqrestore(&subpriv->spinlock, flags);
1085 * Set gate source for an '8254' counter subdevice channel.
1088 dio200_set_gate_src(struct dio200_subdev_8254 *subpriv,
1089 unsigned int counter_number, unsigned int gate_src)
1093 if (!subpriv->has_clk_gat_sce)
1095 if (counter_number > 2)
1100 subpriv->gate_src[counter_number] = gate_src;
1101 byte = GAT_SCE(subpriv->which, counter_number, gate_src);
1102 outb(byte, subpriv->gat_sce_iobase);
1108 * Get gate source for an '8254' counter subdevice channel.
1111 dio200_get_gate_src(struct dio200_subdev_8254 *subpriv,
1112 unsigned int counter_number)
1114 if (!subpriv->has_clk_gat_sce)
1116 if (counter_number > 2)
1119 return subpriv->gate_src[counter_number];
1123 * Set clock source for an '8254' counter subdevice channel.
1126 dio200_set_clock_src(struct dio200_subdev_8254 *subpriv,
1127 unsigned int counter_number, unsigned int clock_src)
1131 if (!subpriv->has_clk_gat_sce)
1133 if (counter_number > 2)
1138 subpriv->clock_src[counter_number] = clock_src;
1139 byte = CLK_SCE(subpriv->which, counter_number, clock_src);
1140 outb(byte, subpriv->clk_sce_iobase);
1146 * Get clock source for an '8254' counter subdevice channel.
1149 dio200_get_clock_src(struct dio200_subdev_8254 *subpriv,
1150 unsigned int counter_number, unsigned int *period_ns)
1154 if (!subpriv->has_clk_gat_sce)
1156 if (counter_number > 2)
1159 clock_src = subpriv->clock_src[counter_number];
1160 *period_ns = clock_period[clock_src];
1165 * Handle 'insn_config' for an '8254' counter subdevice.
1168 dio200_subdev_8254_config(struct comedi_device *dev, struct comedi_subdevice *s,
1169 struct comedi_insn *insn, unsigned int *data)
1171 struct dio200_subdev_8254 *subpriv = s->private;
1173 int chan = CR_CHAN(insn->chanspec);
1174 unsigned long flags;
1176 spin_lock_irqsave(&subpriv->spinlock, flags);
1178 case INSN_CONFIG_SET_COUNTER_MODE:
1179 ret = i8254_set_mode(subpriv->iobase, 0, chan, data[1]);
1183 case INSN_CONFIG_8254_READ_STATUS:
1184 data[1] = i8254_status(subpriv->iobase, 0, chan);
1186 case INSN_CONFIG_SET_GATE_SRC:
1187 ret = dio200_set_gate_src(subpriv, chan, data[2]);
1191 case INSN_CONFIG_GET_GATE_SRC:
1192 ret = dio200_get_gate_src(subpriv, chan);
1199 case INSN_CONFIG_SET_CLOCK_SRC:
1200 ret = dio200_set_clock_src(subpriv, chan, data[1]);
1204 case INSN_CONFIG_GET_CLOCK_SRC:
1205 ret = dio200_get_clock_src(subpriv, chan, &data[2]);
1216 spin_unlock_irqrestore(&subpriv->spinlock, flags);
1217 return ret < 0 ? ret : insn->n;
1221 * This function initializes an '8254' counter subdevice.
1223 * Note: iobase is the base address of the board, not the subdevice;
1224 * offset is the offset to the 8254 chip.
1227 dio200_subdev_8254_init(struct comedi_device *dev, struct comedi_subdevice *s,
1228 unsigned long iobase, unsigned offset,
1229 int has_clk_gat_sce)
1231 struct dio200_subdev_8254 *subpriv;
1234 subpriv = kzalloc(sizeof(*subpriv), GFP_KERNEL);
1236 printk(KERN_ERR "comedi%d: error! out of memory!\n",
1241 s->private = subpriv;
1242 s->type = COMEDI_SUBD_COUNTER;
1243 s->subdev_flags = SDF_WRITABLE | SDF_READABLE;
1245 s->maxdata = 0xFFFF;
1246 s->insn_read = dio200_subdev_8254_read;
1247 s->insn_write = dio200_subdev_8254_write;
1248 s->insn_config = dio200_subdev_8254_config;
1250 spin_lock_init(&subpriv->spinlock);
1251 subpriv->iobase = offset + iobase;
1252 subpriv->has_clk_gat_sce = has_clk_gat_sce;
1253 if (has_clk_gat_sce) {
1254 /* Derive CLK_SCE and GAT_SCE register offsets from
1256 subpriv->clk_sce_iobase =
1257 DIO200_XCLK_SCE + (offset >> 3) + iobase;
1258 subpriv->gat_sce_iobase =
1259 DIO200_XGAT_SCE + (offset >> 3) + iobase;
1260 subpriv->which = (offset >> 2) & 1;
1263 /* Initialize channels. */
1264 for (chan = 0; chan < 3; chan++) {
1265 i8254_set_mode(subpriv->iobase, 0, chan,
1266 I8254_MODE0 | I8254_BINARY);
1267 if (subpriv->has_clk_gat_sce) {
1268 /* Gate source 0 is VCC (logic 1). */
1269 dio200_set_gate_src(subpriv, chan, 0);
1270 /* Clock source 0 is the dedicated clock input. */
1271 dio200_set_clock_src(subpriv, chan, 0);
1279 * This function cleans up an '8254' counter subdevice.
1282 dio200_subdev_8254_cleanup(struct comedi_device *dev,
1283 struct comedi_subdevice *s)
1285 struct dio200_subdev_intr *subpriv = s->private;
1290 * Attach is called by the Comedi core to configure the driver
1291 * for a particular board. If you specified a board_name array
1292 * in the driver structure, dev->board_ptr contains that
1295 static int dio200_attach(struct comedi_device *dev, struct comedi_devconfig *it)
1297 struct comedi_subdevice *s;
1298 unsigned long iobase = 0;
1299 unsigned int irq = 0;
1300 #ifdef CONFIG_COMEDI_PCI
1301 struct pci_dev *pci_dev = NULL;
1302 int bus = 0, slot = 0;
1304 const struct dio200_layout_struct *layout;
1310 printk(KERN_DEBUG "comedi%d: %s: attach\n", dev->minor,
1311 DIO200_DRIVER_NAME);
1313 ret = alloc_private(dev, sizeof(struct dio200_private));
1315 printk(KERN_ERR "comedi%d: error! out of memory!\n",
1320 /* Process options. */
1321 switch (thisboard->bustype) {
1323 iobase = it->options[0];
1324 irq = it->options[1];
1327 #ifdef CONFIG_COMEDI_PCI
1329 bus = it->options[0];
1330 slot = it->options[1];
1333 ret = dio200_find_pci(dev, bus, slot, &pci_dev);
1336 devpriv->pci_dev = pci_dev;
1341 "comedi%d: %s: BUG! cannot determine board type!\n",
1342 dev->minor, DIO200_DRIVER_NAME);
1347 devpriv->intr_sd = -1;
1349 /* Enable device and reserve I/O spaces. */
1350 #ifdef CONFIG_COMEDI_PCI
1352 ret = comedi_pci_enable(pci_dev, DIO200_DRIVER_NAME);
1355 "comedi%d: error! cannot enable PCI device and request regions!\n",
1359 iobase = pci_resource_start(pci_dev, 2);
1364 ret = dio200_request_region(dev->minor, iobase, DIO200_IO_SIZE);
1368 dev->iobase = iobase;
1370 layout = thislayout;
1372 ret = alloc_subdevices(dev, layout->n_subdevs);
1374 printk(KERN_ERR "comedi%d: error! out of memory!\n",
1379 for (n = 0; n < dev->n_subdevices; n++) {
1380 s = &dev->subdevices[n];
1381 switch (layout->sdtype[n]) {
1383 /* counter subdevice (8254) */
1384 ret = dio200_subdev_8254_init(dev, s, iobase,
1386 layout->has_clk_gat_sce);
1392 /* digital i/o subdevice (8255) */
1393 ret = subdev_8255_init(dev, s, NULL,
1394 iobase + layout->sdinfo[n]);
1400 /* 'INTERRUPT' subdevice */
1402 ret = dio200_subdev_intr_init(dev, s,
1411 devpriv->intr_sd = n;
1413 s->type = COMEDI_SUBD_UNUSED;
1417 s->type = COMEDI_SUBD_UNUSED;
1422 sdx = devpriv->intr_sd;
1423 if (sdx >= 0 && sdx < dev->n_subdevices)
1424 dev->read_subdev = &dev->subdevices[sdx];
1426 dev->board_name = thisboard->name;
1429 unsigned long flags = share_irq ? IRQF_SHARED : 0;
1431 if (request_irq(irq, dio200_interrupt, flags,
1432 DIO200_DRIVER_NAME, dev) >= 0) {
1436 "comedi%d: warning! irq %u unavailable!\n",
1441 printk(KERN_INFO "comedi%d: %s ", dev->minor, dev->board_name);
1442 if (thisboard->bustype == isa_bustype) {
1443 printk("(base %#lx) ", iobase);
1445 #ifdef CONFIG_COMEDI_PCI
1446 printk("(pci %s) ", pci_name(pci_dev));
1450 printk("(irq %u%s) ", irq, (dev->irq ? "" : " UNAVAILABLE"));
1452 printk("(no irq) ");
1454 printk("attached\n");
1460 * _detach is called to deconfigure a device. It should deallocate
1462 * This function is also called when _attach() fails, so it should be
1463 * careful not to release resources that were not necessarily
1464 * allocated by _attach(). dev->private and dev->subdevices are
1465 * deallocated automatically by the core.
1467 static int dio200_detach(struct comedi_device *dev)
1469 const struct dio200_layout_struct *layout;
1472 printk(KERN_DEBUG "comedi%d: %s: detach\n", dev->minor,
1473 DIO200_DRIVER_NAME);
1476 free_irq(dev->irq, dev);
1477 if (dev->subdevices) {
1478 layout = thislayout;
1479 for (n = 0; n < dev->n_subdevices; n++) {
1480 struct comedi_subdevice *s = &dev->subdevices[n];
1481 switch (layout->sdtype[n]) {
1483 dio200_subdev_8254_cleanup(dev, s);
1486 subdev_8255_cleanup(dev, s);
1489 dio200_subdev_intr_cleanup(dev, s);
1497 #ifdef CONFIG_COMEDI_PCI
1498 if (devpriv->pci_dev) {
1500 comedi_pci_disable(devpriv->pci_dev);
1501 pci_dev_put(devpriv->pci_dev);
1506 release_region(dev->iobase, DIO200_IO_SIZE);
1509 if (dev->board_name)
1510 printk(KERN_INFO "comedi%d: %s removed\n",
1511 dev->minor, dev->board_name);
1516 MODULE_AUTHOR("Comedi http://www.comedi.org");
1517 MODULE_DESCRIPTION("Comedi low-level driver");
1518 MODULE_LICENSE("GPL");