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 COMEDI_INITCLEANUP(driver_amplc_dio200);
503 * This function looks for a PCI device matching the requested board name,
506 #ifdef CONFIG_COMEDI_PCI
508 dio200_find_pci(struct comedi_device *dev, int bus, int slot,
509 struct pci_dev **pci_dev_p)
511 struct pci_dev *pci_dev = NULL;
515 /* Look for matching PCI device. */
516 for (pci_dev = pci_get_device(PCI_VENDOR_ID_AMPLICON, PCI_ANY_ID, NULL);
518 pci_dev = pci_get_device(PCI_VENDOR_ID_AMPLICON,
519 PCI_ANY_ID, pci_dev)) {
520 /* If bus/slot specified, check them. */
522 if (bus != pci_dev->bus->number
523 || slot != PCI_SLOT(pci_dev->devfn))
526 if (thisboard->model == anypci_model) {
527 /* Match any supported model. */
530 for (i = 0; i < ARRAY_SIZE(dio200_boards); i++) {
531 if (dio200_boards[i].bustype != pci_bustype)
533 if (pci_dev->device == dio200_boards[i].devid) {
534 /* Change board_ptr to matched board. */
535 dev->board_ptr = &dio200_boards[i];
539 if (i == ARRAY_SIZE(dio200_boards))
542 /* Match specific model name. */
543 if (pci_dev->device != thisboard->devid)
548 *pci_dev_p = pci_dev;
551 /* No match found. */
554 "comedi%d: error! no %s found at pci %02x:%02x!\n",
555 dev->minor, thisboard->name, bus, slot);
557 printk(KERN_ERR "comedi%d: error! no %s found!\n",
558 dev->minor, thisboard->name);
565 * This function checks and requests an I/O region, reporting an error
566 * if there is a conflict.
569 dio200_request_region(unsigned minor, unsigned long from, unsigned long extent)
571 if (!from || !request_region(from, extent, DIO200_DRIVER_NAME)) {
572 printk(KERN_ERR "comedi%d: I/O port conflict (%#lx,%lu)!\n",
573 minor, from, extent);
580 * 'insn_bits' function for an 'INTERRUPT' subdevice.
583 dio200_subdev_intr_insn_bits(struct comedi_device *dev,
584 struct comedi_subdevice *s,
585 struct comedi_insn *insn, unsigned int *data)
587 struct dio200_subdev_intr *subpriv = s->private;
589 if (subpriv->has_int_sce) {
590 /* Just read the interrupt status register. */
591 data[1] = inb(subpriv->iobase) & subpriv->valid_isns;
593 /* No interrupt status register. */
601 * Called to stop acquisition for an 'INTERRUPT' subdevice.
603 static void dio200_stop_intr(struct comedi_device *dev,
604 struct comedi_subdevice *s)
606 struct dio200_subdev_intr *subpriv = s->private;
609 subpriv->enabled_isns = 0;
610 if (subpriv->has_int_sce)
611 outb(0, subpriv->iobase);
615 * Called to start acquisition for an 'INTERRUPT' subdevice.
617 static int dio200_start_intr(struct comedi_device *dev,
618 struct comedi_subdevice *s)
622 struct dio200_subdev_intr *subpriv = s->private;
623 struct comedi_cmd *cmd = &s->async->cmd;
626 if (!subpriv->continuous && subpriv->stopcount == 0) {
627 /* An empty acquisition! */
628 s->async->events |= COMEDI_CB_EOA;
632 /* Determine interrupt sources to enable. */
635 for (n = 0; n < cmd->chanlist_len; n++)
636 isn_bits |= (1U << CR_CHAN(cmd->chanlist[n]));
638 isn_bits &= subpriv->valid_isns;
639 /* Enable interrupt sources. */
640 subpriv->enabled_isns = isn_bits;
641 if (subpriv->has_int_sce)
642 outb(isn_bits, subpriv->iobase);
649 * Internal trigger function to start acquisition for an 'INTERRUPT' subdevice.
652 dio200_inttrig_start_intr(struct comedi_device *dev, struct comedi_subdevice *s,
653 unsigned int trignum)
655 struct dio200_subdev_intr *subpriv;
662 subpriv = s->private;
664 spin_lock_irqsave(&subpriv->spinlock, flags);
665 s->async->inttrig = NULL;
667 event = dio200_start_intr(dev, s);
669 spin_unlock_irqrestore(&subpriv->spinlock, flags);
672 comedi_event(dev, s);
678 * This is called from the interrupt service routine to handle a read
679 * scan on an 'INTERRUPT' subdevice.
681 static int dio200_handle_read_intr(struct comedi_device *dev,
682 struct comedi_subdevice *s)
684 struct dio200_subdev_intr *subpriv = s->private;
687 unsigned cur_enabled;
688 unsigned int oldevents;
693 spin_lock_irqsave(&subpriv->spinlock, flags);
694 oldevents = s->async->events;
695 if (subpriv->has_int_sce) {
697 * Collect interrupt sources that have triggered and disable
698 * them temporarily. Loop around until no extra interrupt
699 * sources have triggered, at which point, the valid part of
700 * the interrupt status register will read zero, clearing the
701 * cause of the interrupt.
703 * Mask off interrupt sources already seen to avoid infinite
704 * loop in case of misconfiguration.
706 cur_enabled = subpriv->enabled_isns;
707 while ((intstat = (inb(subpriv->iobase) & subpriv->valid_isns
708 & ~triggered)) != 0) {
709 triggered |= intstat;
710 cur_enabled &= ~triggered;
711 outb(cur_enabled, subpriv->iobase);
715 * No interrupt status register. Assume the single interrupt
716 * source has triggered.
718 triggered = subpriv->enabled_isns;
723 * Some interrupt sources have triggered and have been
724 * temporarily disabled to clear the cause of the interrupt.
726 * Reenable them NOW to minimize the time they are disabled.
728 cur_enabled = subpriv->enabled_isns;
729 if (subpriv->has_int_sce)
730 outb(cur_enabled, subpriv->iobase);
732 if (subpriv->active) {
734 * The command is still active.
736 * Ignore interrupt sources that the command isn't
737 * interested in (just in case there's a race
740 if (triggered & subpriv->enabled_isns) {
741 /* Collect scan data. */
743 unsigned int n, ch, len;
746 len = s->async->cmd.chanlist_len;
747 for (n = 0; n < len; n++) {
748 ch = CR_CHAN(s->async->cmd.chanlist[n]);
749 if (triggered & (1U << ch))
752 /* Write the scan to the buffer. */
753 if (comedi_buf_put(s->async, val)) {
754 s->async->events |= (COMEDI_CB_BLOCK |
757 /* Error! Stop acquisition. */
758 dio200_stop_intr(dev, s);
759 s->async->events |= COMEDI_CB_ERROR
760 | COMEDI_CB_OVERFLOW;
761 comedi_error(dev, "buffer overflow");
764 /* Check for end of acquisition. */
765 if (!subpriv->continuous) {
766 /* stop_src == TRIG_COUNT */
767 if (subpriv->stopcount > 0) {
768 subpriv->stopcount--;
769 if (subpriv->stopcount == 0) {
772 dio200_stop_intr(dev,
780 spin_unlock_irqrestore(&subpriv->spinlock, flags);
782 if (oldevents != s->async->events)
783 comedi_event(dev, s);
785 return (triggered != 0);
789 * 'cancel' function for an 'INTERRUPT' subdevice.
791 static int dio200_subdev_intr_cancel(struct comedi_device *dev,
792 struct comedi_subdevice *s)
794 struct dio200_subdev_intr *subpriv = s->private;
797 spin_lock_irqsave(&subpriv->spinlock, flags);
799 dio200_stop_intr(dev, s);
801 spin_unlock_irqrestore(&subpriv->spinlock, flags);
807 * 'do_cmdtest' function for an 'INTERRUPT' subdevice.
810 dio200_subdev_intr_cmdtest(struct comedi_device *dev,
811 struct comedi_subdevice *s, struct comedi_cmd *cmd)
816 /* step 1: make sure trigger sources are trivially valid */
818 tmp = cmd->start_src;
819 cmd->start_src &= (TRIG_NOW | TRIG_INT);
820 if (!cmd->start_src || tmp != cmd->start_src)
823 tmp = cmd->scan_begin_src;
824 cmd->scan_begin_src &= TRIG_EXT;
825 if (!cmd->scan_begin_src || tmp != cmd->scan_begin_src)
828 tmp = cmd->convert_src;
829 cmd->convert_src &= TRIG_NOW;
830 if (!cmd->convert_src || tmp != cmd->convert_src)
833 tmp = cmd->scan_end_src;
834 cmd->scan_end_src &= TRIG_COUNT;
835 if (!cmd->scan_end_src || tmp != cmd->scan_end_src)
839 cmd->stop_src &= (TRIG_COUNT | TRIG_NONE);
840 if (!cmd->stop_src || tmp != cmd->stop_src)
846 /* step 2: make sure trigger sources are unique and mutually
849 /* these tests are true if more than one _src bit is set */
850 if ((cmd->start_src & (cmd->start_src - 1)) != 0)
852 if ((cmd->scan_begin_src & (cmd->scan_begin_src - 1)) != 0)
854 if ((cmd->convert_src & (cmd->convert_src - 1)) != 0)
856 if ((cmd->scan_end_src & (cmd->scan_end_src - 1)) != 0)
858 if ((cmd->stop_src & (cmd->stop_src - 1)) != 0)
864 /* step 3: make sure arguments are trivially compatible */
866 /* cmd->start_src == TRIG_NOW || cmd->start_src == TRIG_INT */
867 if (cmd->start_arg != 0) {
872 /* cmd->scan_begin_src == TRIG_EXT */
873 if (cmd->scan_begin_arg != 0) {
874 cmd->scan_begin_arg = 0;
878 /* cmd->convert_src == TRIG_NOW */
879 if (cmd->convert_arg != 0) {
880 cmd->convert_arg = 0;
884 /* cmd->scan_end_src == TRIG_COUNT */
885 if (cmd->scan_end_arg != cmd->chanlist_len) {
886 cmd->scan_end_arg = cmd->chanlist_len;
890 switch (cmd->stop_src) {
892 /* any count allowed */
895 if (cmd->stop_arg != 0) {
907 /* step 4: fix up any arguments */
909 /* if (err) return 4; */
915 * 'do_cmd' function for an 'INTERRUPT' subdevice.
917 static int dio200_subdev_intr_cmd(struct comedi_device *dev,
918 struct comedi_subdevice *s)
920 struct comedi_cmd *cmd = &s->async->cmd;
921 struct dio200_subdev_intr *subpriv = s->private;
925 spin_lock_irqsave(&subpriv->spinlock, flags);
928 /* Set up end of acquisition. */
929 switch (cmd->stop_src) {
931 subpriv->continuous = 0;
932 subpriv->stopcount = cmd->stop_arg;
936 subpriv->continuous = 1;
937 subpriv->stopcount = 0;
941 /* Set up start of acquisition. */
942 switch (cmd->start_src) {
944 s->async->inttrig = dio200_inttrig_start_intr;
948 event = dio200_start_intr(dev, s);
951 spin_unlock_irqrestore(&subpriv->spinlock, flags);
954 comedi_event(dev, s);
960 * This function initializes an 'INTERRUPT' subdevice.
963 dio200_subdev_intr_init(struct comedi_device *dev, struct comedi_subdevice *s,
964 unsigned long iobase, unsigned valid_isns,
967 struct dio200_subdev_intr *subpriv;
969 subpriv = kzalloc(sizeof(*subpriv), GFP_KERNEL);
971 printk(KERN_ERR "comedi%d: error! out of memory!\n",
975 subpriv->iobase = iobase;
976 subpriv->has_int_sce = has_int_sce;
977 subpriv->valid_isns = valid_isns;
978 spin_lock_init(&subpriv->spinlock);
981 outb(0, subpriv->iobase); /* Disable interrupt sources. */
983 s->private = subpriv;
984 s->type = COMEDI_SUBD_DI;
985 s->subdev_flags = SDF_READABLE | SDF_CMD_READ;
987 s->n_chan = DIO200_MAX_ISNS;
988 s->len_chanlist = DIO200_MAX_ISNS;
990 /* No interrupt source register. Support single channel. */
994 s->range_table = &range_digital;
996 s->insn_bits = dio200_subdev_intr_insn_bits;
997 s->do_cmdtest = dio200_subdev_intr_cmdtest;
998 s->do_cmd = dio200_subdev_intr_cmd;
999 s->cancel = dio200_subdev_intr_cancel;
1005 * This function cleans up an 'INTERRUPT' subdevice.
1008 dio200_subdev_intr_cleanup(struct comedi_device *dev,
1009 struct comedi_subdevice *s)
1011 struct dio200_subdev_intr *subpriv = s->private;
1016 * Interrupt service routine.
1018 static irqreturn_t dio200_interrupt(int irq, void *d)
1020 struct comedi_device *dev = d;
1026 if (devpriv->intr_sd >= 0) {
1027 handled = dio200_handle_read_intr(dev,
1034 return IRQ_RETVAL(handled);
1038 * Handle 'insn_read' for an '8254' counter subdevice.
1041 dio200_subdev_8254_read(struct comedi_device *dev, struct comedi_subdevice *s,
1042 struct comedi_insn *insn, unsigned int *data)
1044 struct dio200_subdev_8254 *subpriv = s->private;
1045 int chan = CR_CHAN(insn->chanspec);
1046 unsigned long flags;
1048 spin_lock_irqsave(&subpriv->spinlock, flags);
1049 data[0] = i8254_read(subpriv->iobase, 0, chan);
1050 spin_unlock_irqrestore(&subpriv->spinlock, flags);
1056 * Handle 'insn_write' for an '8254' counter subdevice.
1059 dio200_subdev_8254_write(struct comedi_device *dev, struct comedi_subdevice *s,
1060 struct comedi_insn *insn, unsigned int *data)
1062 struct dio200_subdev_8254 *subpriv = s->private;
1063 int chan = CR_CHAN(insn->chanspec);
1064 unsigned long flags;
1066 spin_lock_irqsave(&subpriv->spinlock, flags);
1067 i8254_write(subpriv->iobase, 0, chan, data[0]);
1068 spin_unlock_irqrestore(&subpriv->spinlock, flags);
1074 * Set gate source for an '8254' counter subdevice channel.
1077 dio200_set_gate_src(struct dio200_subdev_8254 *subpriv,
1078 unsigned int counter_number, unsigned int gate_src)
1082 if (!subpriv->has_clk_gat_sce)
1084 if (counter_number > 2)
1089 subpriv->gate_src[counter_number] = gate_src;
1090 byte = GAT_SCE(subpriv->which, counter_number, gate_src);
1091 outb(byte, subpriv->gat_sce_iobase);
1097 * Get gate source for an '8254' counter subdevice channel.
1100 dio200_get_gate_src(struct dio200_subdev_8254 *subpriv,
1101 unsigned int counter_number)
1103 if (!subpriv->has_clk_gat_sce)
1105 if (counter_number > 2)
1108 return subpriv->gate_src[counter_number];
1112 * Set clock source for an '8254' counter subdevice channel.
1115 dio200_set_clock_src(struct dio200_subdev_8254 *subpriv,
1116 unsigned int counter_number, unsigned int clock_src)
1120 if (!subpriv->has_clk_gat_sce)
1122 if (counter_number > 2)
1127 subpriv->clock_src[counter_number] = clock_src;
1128 byte = CLK_SCE(subpriv->which, counter_number, clock_src);
1129 outb(byte, subpriv->clk_sce_iobase);
1135 * Get clock source for an '8254' counter subdevice channel.
1138 dio200_get_clock_src(struct dio200_subdev_8254 *subpriv,
1139 unsigned int counter_number, unsigned int *period_ns)
1143 if (!subpriv->has_clk_gat_sce)
1145 if (counter_number > 2)
1148 clock_src = subpriv->clock_src[counter_number];
1149 *period_ns = clock_period[clock_src];
1154 * Handle 'insn_config' for an '8254' counter subdevice.
1157 dio200_subdev_8254_config(struct comedi_device *dev, struct comedi_subdevice *s,
1158 struct comedi_insn *insn, unsigned int *data)
1160 struct dio200_subdev_8254 *subpriv = s->private;
1162 int chan = CR_CHAN(insn->chanspec);
1163 unsigned long flags;
1165 spin_lock_irqsave(&subpriv->spinlock, flags);
1167 case INSN_CONFIG_SET_COUNTER_MODE:
1168 ret = i8254_set_mode(subpriv->iobase, 0, chan, data[1]);
1172 case INSN_CONFIG_8254_READ_STATUS:
1173 data[1] = i8254_status(subpriv->iobase, 0, chan);
1175 case INSN_CONFIG_SET_GATE_SRC:
1176 ret = dio200_set_gate_src(subpriv, chan, data[2]);
1180 case INSN_CONFIG_GET_GATE_SRC:
1181 ret = dio200_get_gate_src(subpriv, chan);
1188 case INSN_CONFIG_SET_CLOCK_SRC:
1189 ret = dio200_set_clock_src(subpriv, chan, data[1]);
1193 case INSN_CONFIG_GET_CLOCK_SRC:
1194 ret = dio200_get_clock_src(subpriv, chan, &data[2]);
1205 spin_unlock_irqrestore(&subpriv->spinlock, flags);
1206 return ret < 0 ? ret : insn->n;
1210 * This function initializes an '8254' counter subdevice.
1212 * Note: iobase is the base address of the board, not the subdevice;
1213 * offset is the offset to the 8254 chip.
1216 dio200_subdev_8254_init(struct comedi_device *dev, struct comedi_subdevice *s,
1217 unsigned long iobase, unsigned offset,
1218 int has_clk_gat_sce)
1220 struct dio200_subdev_8254 *subpriv;
1223 subpriv = kzalloc(sizeof(*subpriv), GFP_KERNEL);
1225 printk(KERN_ERR "comedi%d: error! out of memory!\n",
1230 s->private = subpriv;
1231 s->type = COMEDI_SUBD_COUNTER;
1232 s->subdev_flags = SDF_WRITABLE | SDF_READABLE;
1234 s->maxdata = 0xFFFF;
1235 s->insn_read = dio200_subdev_8254_read;
1236 s->insn_write = dio200_subdev_8254_write;
1237 s->insn_config = dio200_subdev_8254_config;
1239 spin_lock_init(&subpriv->spinlock);
1240 subpriv->iobase = offset + iobase;
1241 subpriv->has_clk_gat_sce = has_clk_gat_sce;
1242 if (has_clk_gat_sce) {
1243 /* Derive CLK_SCE and GAT_SCE register offsets from
1245 subpriv->clk_sce_iobase =
1246 DIO200_XCLK_SCE + (offset >> 3) + iobase;
1247 subpriv->gat_sce_iobase =
1248 DIO200_XGAT_SCE + (offset >> 3) + iobase;
1249 subpriv->which = (offset >> 2) & 1;
1252 /* Initialize channels. */
1253 for (chan = 0; chan < 3; chan++) {
1254 i8254_set_mode(subpriv->iobase, 0, chan,
1255 I8254_MODE0 | I8254_BINARY);
1256 if (subpriv->has_clk_gat_sce) {
1257 /* Gate source 0 is VCC (logic 1). */
1258 dio200_set_gate_src(subpriv, chan, 0);
1259 /* Clock source 0 is the dedicated clock input. */
1260 dio200_set_clock_src(subpriv, chan, 0);
1268 * This function cleans up an '8254' counter subdevice.
1271 dio200_subdev_8254_cleanup(struct comedi_device *dev,
1272 struct comedi_subdevice *s)
1274 struct dio200_subdev_intr *subpriv = s->private;
1279 * Attach is called by the Comedi core to configure the driver
1280 * for a particular board. If you specified a board_name array
1281 * in the driver structure, dev->board_ptr contains that
1284 static int dio200_attach(struct comedi_device *dev, struct comedi_devconfig *it)
1286 struct comedi_subdevice *s;
1287 unsigned long iobase = 0;
1288 unsigned int irq = 0;
1289 #ifdef CONFIG_COMEDI_PCI
1290 struct pci_dev *pci_dev = NULL;
1291 int bus = 0, slot = 0;
1293 const struct dio200_layout_struct *layout;
1299 printk(KERN_DEBUG "comedi%d: %s: attach\n", dev->minor,
1300 DIO200_DRIVER_NAME);
1302 ret = alloc_private(dev, sizeof(struct dio200_private));
1304 printk(KERN_ERR "comedi%d: error! out of memory!\n",
1309 /* Process options. */
1310 switch (thisboard->bustype) {
1312 iobase = it->options[0];
1313 irq = it->options[1];
1316 #ifdef CONFIG_COMEDI_PCI
1318 bus = it->options[0];
1319 slot = it->options[1];
1322 ret = dio200_find_pci(dev, bus, slot, &pci_dev);
1325 devpriv->pci_dev = pci_dev;
1330 "comedi%d: %s: BUG! cannot determine board type!\n",
1331 dev->minor, DIO200_DRIVER_NAME);
1336 devpriv->intr_sd = -1;
1338 /* Enable device and reserve I/O spaces. */
1339 #ifdef CONFIG_COMEDI_PCI
1341 ret = comedi_pci_enable(pci_dev, DIO200_DRIVER_NAME);
1344 "comedi%d: error! cannot enable PCI device and request regions!\n",
1348 iobase = pci_resource_start(pci_dev, 2);
1353 ret = dio200_request_region(dev->minor, iobase, DIO200_IO_SIZE);
1357 dev->iobase = iobase;
1359 layout = thislayout;
1361 ret = alloc_subdevices(dev, layout->n_subdevs);
1363 printk(KERN_ERR "comedi%d: error! out of memory!\n",
1368 for (n = 0; n < dev->n_subdevices; n++) {
1369 s = &dev->subdevices[n];
1370 switch (layout->sdtype[n]) {
1372 /* counter subdevice (8254) */
1373 ret = dio200_subdev_8254_init(dev, s, iobase,
1375 layout->has_clk_gat_sce);
1381 /* digital i/o subdevice (8255) */
1382 ret = subdev_8255_init(dev, s, NULL,
1383 iobase + layout->sdinfo[n]);
1389 /* 'INTERRUPT' subdevice */
1391 ret = dio200_subdev_intr_init(dev, s,
1400 devpriv->intr_sd = n;
1402 s->type = COMEDI_SUBD_UNUSED;
1406 s->type = COMEDI_SUBD_UNUSED;
1411 sdx = devpriv->intr_sd;
1412 if (sdx >= 0 && sdx < dev->n_subdevices)
1413 dev->read_subdev = &dev->subdevices[sdx];
1415 dev->board_name = thisboard->name;
1418 unsigned long flags = share_irq ? IRQF_SHARED : 0;
1420 if (request_irq(irq, dio200_interrupt, flags,
1421 DIO200_DRIVER_NAME, dev) >= 0) {
1425 "comedi%d: warning! irq %u unavailable!\n",
1430 printk(KERN_INFO "comedi%d: %s ", dev->minor, dev->board_name);
1431 if (thisboard->bustype == isa_bustype) {
1432 printk("(base %#lx) ", iobase);
1434 #ifdef CONFIG_COMEDI_PCI
1435 printk("(pci %s) ", pci_name(pci_dev));
1439 printk("(irq %u%s) ", irq, (dev->irq ? "" : " UNAVAILABLE"));
1441 printk("(no irq) ");
1443 printk("attached\n");
1449 * _detach is called to deconfigure a device. It should deallocate
1451 * This function is also called when _attach() fails, so it should be
1452 * careful not to release resources that were not necessarily
1453 * allocated by _attach(). dev->private and dev->subdevices are
1454 * deallocated automatically by the core.
1456 static int dio200_detach(struct comedi_device *dev)
1458 const struct dio200_layout_struct *layout;
1461 printk(KERN_DEBUG "comedi%d: %s: detach\n", dev->minor,
1462 DIO200_DRIVER_NAME);
1465 free_irq(dev->irq, dev);
1466 if (dev->subdevices) {
1467 layout = thislayout;
1468 for (n = 0; n < dev->n_subdevices; n++) {
1469 struct comedi_subdevice *s = &dev->subdevices[n];
1470 switch (layout->sdtype[n]) {
1472 dio200_subdev_8254_cleanup(dev, s);
1475 subdev_8255_cleanup(dev, s);
1478 dio200_subdev_intr_cleanup(dev, s);
1486 #ifdef CONFIG_COMEDI_PCI
1487 if (devpriv->pci_dev) {
1489 comedi_pci_disable(devpriv->pci_dev);
1490 pci_dev_put(devpriv->pci_dev);
1495 release_region(dev->iobase, DIO200_IO_SIZE);
1498 if (dev->board_name)
1499 printk(KERN_INFO "comedi%d: %s removed\n",
1500 dev->minor, dev->board_name);