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 sampl_t value, one bit per requested channel, in the
205 order they appear in the channel list.
208 #include <linux/comedidev.h>
210 #include "comedi_pci.h"
215 #define DIO200_DRIVER_NAME "amplc_dio200"
218 /* #define PCI_VENDOR_ID_AMPLICON 0x14dc */
219 #define PCI_DEVICE_ID_AMPLICON_PCI272 0x000a
220 #define PCI_DEVICE_ID_AMPLICON_PCI215 0x000b
221 #define PCI_DEVICE_ID_INVALID 0xffff
223 /* 200 series registers */
224 #define DIO200_IO_SIZE 0x20
225 #define DIO200_XCLK_SCE 0x18 /* Group X clock selection register */
226 #define DIO200_YCLK_SCE 0x19 /* Group Y clock selection register */
227 #define DIO200_ZCLK_SCE 0x1a /* Group Z clock selection register */
228 #define DIO200_XGAT_SCE 0x1b /* Group X gate selection register */
229 #define DIO200_YGAT_SCE 0x1c /* Group Y gate selection register */
230 #define DIO200_ZGAT_SCE 0x1d /* Group Z gate selection register */
231 #define DIO200_INT_SCE 0x1e /* Interrupt enable/status register */
234 * Macros for constructing value for DIO_200_?CLK_SCE and
235 * DIO_200_?GAT_SCE registers:
237 * 'which' is: 0 for CTR-X1, CTR-Y1, CTR-Z1; 1 for CTR-X2, CTR-Y2 or CTR-Z2.
238 * 'chan' is the channel: 0, 1 or 2.
239 * 'source' is the signal source: 0 to 7.
241 #define CLK_SCE(which, chan, source) (((which) << 5) | ((chan) << 3) | (source))
242 #define GAT_SCE(which, chan, source) (((which) << 5) | ((chan) << 3) | (source))
245 * Periods of the internal clock sources in nanoseconds.
247 static const unsigned clock_period[8] = {
248 0, /* dedicated clock input/output pin */
255 0 /* group clock input pin */
259 * Board descriptions.
262 enum dio200_bustype { isa_bustype, pci_bustype };
267 pc215e_model, pci215_model,
269 pc272e_model, pci272_model,
281 typedef struct dio200_board_struct {
283 unsigned short devid;
284 enum dio200_bustype bustype;
285 enum dio200_model model;
286 enum dio200_layout layout;
289 static const dio200_board dio200_boards[] = {
292 bustype: isa_bustype,
294 layout: pc212_layout,
298 bustype: isa_bustype,
300 layout: pc214_layout,
304 bustype: isa_bustype,
306 layout: pc215_layout,
308 #ifdef CONFIG_COMEDI_PCI
311 devid: PCI_DEVICE_ID_AMPLICON_PCI215,
312 bustype: pci_bustype,
314 layout: pc215_layout,
319 bustype: isa_bustype,
321 layout: pc218_layout,
325 bustype: isa_bustype,
327 layout: pc272_layout,
329 #ifdef CONFIG_COMEDI_PCI
332 devid: PCI_DEVICE_ID_AMPLICON_PCI272,
333 bustype: pci_bustype,
335 layout: pc272_layout,
338 #ifdef CONFIG_COMEDI_PCI
340 name: DIO200_DRIVER_NAME,
341 devid: PCI_DEVICE_ID_INVALID,
342 bustype: pci_bustype,
343 model: anypci_model, /* wildcard */
349 * Layout descriptions - some ISA and PCI board descriptions share the same
353 enum dio200_sdtype { sd_none, sd_intr, sd_8255, sd_8254 };
355 #define DIO200_MAX_SUBDEVS 7
356 #define DIO200_MAX_ISNS 6
358 typedef struct dio200_layout_struct {
359 unsigned short n_subdevs; /* number of subdevices */
360 unsigned char sdtype[DIO200_MAX_SUBDEVS]; /* enum dio200_sdtype */
361 unsigned char sdinfo[DIO200_MAX_SUBDEVS]; /* depends on sdtype */
362 char has_int_sce; /* has interrupt enable/status register */
363 char has_clk_gat_sce; /* has clock/gate selection registers */
366 static const dio200_layout dio200_layouts[] = {
369 sdtype: {sd_8255, sd_8254, sd_8254, sd_8254,
372 sdinfo: {0x00, 0x08, 0x0C, 0x10, 0x14,
379 sdtype: {sd_8255, sd_8255, sd_8254,
381 sdinfo: {0x00, 0x08, 0x10, 0x01},
387 sdtype: {sd_8255, sd_8255, sd_8254,
390 sdinfo: {0x00, 0x08, 0x10, 0x14, 0x3F},
396 sdtype: {sd_8254, sd_8254, sd_8255, sd_8254,
399 sdinfo: {0x00, 0x04, 0x08, 0x0C, 0x10,
407 sdtype: {sd_8255, sd_8255, sd_8255,
409 sdinfo: {0x00, 0x08, 0x10, 0x3F},
419 #ifdef CONFIG_COMEDI_PCI
420 static DEFINE_PCI_DEVICE_TABLE(dio200_pci_table) = {
421 {PCI_VENDOR_ID_AMPLICON, PCI_DEVICE_ID_AMPLICON_PCI215,
422 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
423 {PCI_VENDOR_ID_AMPLICON, PCI_DEVICE_ID_AMPLICON_PCI272,
424 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
428 MODULE_DEVICE_TABLE(pci, dio200_pci_table);
429 #endif /* CONFIG_COMEDI_PCI */
432 * Useful for shorthand access to the particular board structure
434 #define thisboard ((const dio200_board *)dev->board_ptr)
435 #define thislayout (&dio200_layouts[((dio200_board *)dev->board_ptr)->layout])
437 /* this structure is for data unique to this hardware driver. If
438 several hardware drivers keep similar information in this structure,
439 feel free to suggest moving the variable to the comedi_device struct. */
441 #ifdef CONFIG_COMEDI_PCI
442 struct pci_dev *pci_dev; /* PCI device */
447 #define devpriv ((dio200_private *)dev->private)
450 unsigned long iobase; /* Counter base address */
451 unsigned long clk_sce_iobase; /* CLK_SCE base address */
452 unsigned long gat_sce_iobase; /* GAT_SCE base address */
453 int which; /* Bit 5 of CLK_SCE or GAT_SCE */
455 unsigned clock_src[3]; /* Current clock sources */
456 unsigned gate_src[3]; /* Current gate sources */
458 } dio200_subdev_8254;
461 unsigned long iobase;
465 unsigned int valid_isns;
466 unsigned int enabled_isns;
467 unsigned int stopcount;
469 } dio200_subdev_intr;
472 * The comedi_driver structure tells the Comedi core module
473 * which functions to call to configure/deconfigure (attach/detach)
474 * the board, and also about the kernel module that contains
477 static int dio200_attach(comedi_device * dev, comedi_devconfig * it);
478 static int dio200_detach(comedi_device * dev);
479 static comedi_driver driver_amplc_dio200 = {
480 driver_name:DIO200_DRIVER_NAME,
482 attach:dio200_attach,
483 detach:dio200_detach,
484 board_name:&dio200_boards[0].name,
485 offset:sizeof(dio200_board),
486 num_names:sizeof(dio200_boards) / sizeof(dio200_board),
489 #ifdef CONFIG_COMEDI_PCI
490 COMEDI_PCI_INITCLEANUP(driver_amplc_dio200, dio200_pci_table);
492 COMEDI_INITCLEANUP(driver_amplc_dio200);
496 * This function looks for a PCI device matching the requested board name,
499 #ifdef CONFIG_COMEDI_PCI
501 dio200_find_pci(comedi_device * dev, int bus, int slot,
502 struct pci_dev **pci_dev_p)
504 struct pci_dev *pci_dev = NULL;
508 /* Look for matching PCI device. */
509 for (pci_dev = pci_get_device(PCI_VENDOR_ID_AMPLICON, PCI_ANY_ID, NULL);
511 pci_dev = pci_get_device(PCI_VENDOR_ID_AMPLICON,
512 PCI_ANY_ID, pci_dev)) {
513 /* If bus/slot specified, check them. */
515 if (bus != pci_dev->bus->number
516 || slot != PCI_SLOT(pci_dev->devfn))
519 if (thisboard->model == anypci_model) {
520 /* Match any supported model. */
523 for (i = 0; i < ARRAY_SIZE(dio200_boards); i++) {
524 if (dio200_boards[i].bustype != pci_bustype)
526 if (pci_dev->device == dio200_boards[i].devid) {
527 /* Change board_ptr to matched board. */
528 dev->board_ptr = &dio200_boards[i];
532 if (i == ARRAY_SIZE(dio200_boards))
535 /* Match specific model name. */
536 if (pci_dev->device != thisboard->devid)
541 *pci_dev_p = pci_dev;
544 /* No match found. */
547 "comedi%d: error! no %s found at pci %02x:%02x!\n",
548 dev->minor, thisboard->name, bus, slot);
550 printk(KERN_ERR "comedi%d: error! no %s found!\n",
551 dev->minor, thisboard->name);
558 * This function checks and requests an I/O region, reporting an error
559 * if there is a conflict.
562 dio200_request_region(unsigned minor, unsigned long from, unsigned long extent)
564 if (!from || !request_region(from, extent, DIO200_DRIVER_NAME)) {
565 printk(KERN_ERR "comedi%d: I/O port conflict (%#lx,%lu)!\n",
566 minor, from, extent);
573 * 'insn_bits' function for an 'INTERRUPT' subdevice.
576 dio200_subdev_intr_insn_bits(comedi_device * dev, comedi_subdevice * s,
577 comedi_insn * insn, lsampl_t * data)
579 dio200_subdev_intr *subpriv = s->private;
581 if (subpriv->has_int_sce) {
582 /* Just read the interrupt status register. */
583 data[1] = inb(subpriv->iobase) & subpriv->valid_isns;
585 /* No interrupt status register. */
593 * Called to stop acquisition for an 'INTERRUPT' subdevice.
595 static void dio200_stop_intr(comedi_device * dev, comedi_subdevice * s)
597 dio200_subdev_intr *subpriv = s->private;
600 subpriv->enabled_isns = 0;
601 if (subpriv->has_int_sce) {
602 outb(0, subpriv->iobase);
607 * Called to start acquisition for an 'INTERRUPT' subdevice.
609 static int dio200_start_intr(comedi_device * dev, comedi_subdevice * s)
613 dio200_subdev_intr *subpriv = s->private;
614 comedi_cmd *cmd = &s->async->cmd;
617 if (!subpriv->continuous && subpriv->stopcount == 0) {
618 /* An empty acquisition! */
619 s->async->events |= COMEDI_CB_EOA;
623 /* Determine interrupt sources to enable. */
626 for (n = 0; n < cmd->chanlist_len; n++) {
627 isn_bits |= (1U << CR_CHAN(cmd->chanlist[n]));
630 isn_bits &= subpriv->valid_isns;
631 /* Enable interrupt sources. */
632 subpriv->enabled_isns = isn_bits;
633 if (subpriv->has_int_sce) {
634 outb(isn_bits, subpriv->iobase);
642 * Internal trigger function to start acquisition for an 'INTERRUPT' subdevice.
645 dio200_inttrig_start_intr(comedi_device * dev, comedi_subdevice * s,
646 unsigned int trignum)
648 dio200_subdev_intr *subpriv;
655 subpriv = s->private;
657 comedi_spin_lock_irqsave(&subpriv->spinlock, flags);
658 s->async->inttrig = 0;
659 if (subpriv->active) {
660 event = dio200_start_intr(dev, s);
662 comedi_spin_unlock_irqrestore(&subpriv->spinlock, flags);
665 comedi_event(dev, s);
672 * This is called from the interrupt service routine to handle a read
673 * scan on an 'INTERRUPT' subdevice.
675 static int dio200_handle_read_intr(comedi_device * dev, comedi_subdevice * s)
677 dio200_subdev_intr *subpriv = s->private;
680 unsigned cur_enabled;
681 unsigned int oldevents;
686 comedi_spin_lock_irqsave(&subpriv->spinlock, flags);
687 oldevents = s->async->events;
688 if (subpriv->has_int_sce) {
690 * Collect interrupt sources that have triggered and disable
691 * them temporarily. Loop around until no extra interrupt
692 * sources have triggered, at which point, the valid part of
693 * the interrupt status register will read zero, clearing the
694 * cause of the interrupt.
696 * Mask off interrupt sources already seen to avoid infinite
697 * loop in case of misconfiguration.
699 cur_enabled = subpriv->enabled_isns;
700 while ((intstat = (inb(subpriv->iobase) & subpriv->valid_isns
701 & ~triggered)) != 0) {
702 triggered |= intstat;
703 cur_enabled &= ~triggered;
704 outb(cur_enabled, subpriv->iobase);
708 * No interrupt status register. Assume the single interrupt
709 * source has triggered.
711 triggered = subpriv->enabled_isns;
716 * Some interrupt sources have triggered and have been
717 * temporarily disabled to clear the cause of the interrupt.
719 * Reenable them NOW to minimize the time they are disabled.
721 cur_enabled = subpriv->enabled_isns;
722 if (subpriv->has_int_sce) {
723 outb(cur_enabled, subpriv->iobase);
726 if (subpriv->active) {
728 * The command is still active.
730 * Ignore interrupt sources that the command isn't
731 * interested in (just in case there's a race
734 if (triggered & subpriv->enabled_isns) {
735 /* Collect scan data. */
737 unsigned int n, ch, len;
740 len = s->async->cmd.chanlist_len;
741 for (n = 0; n < len; n++) {
742 ch = CR_CHAN(s->async->cmd.chanlist[n]);
743 if (triggered & (1U << ch)) {
747 /* Write the scan to the buffer. */
748 if (comedi_buf_put(s->async, val)) {
749 s->async->events |= (COMEDI_CB_BLOCK |
752 /* Error! Stop acquisition. */
753 dio200_stop_intr(dev, s);
754 s->async->events |= COMEDI_CB_ERROR
755 | COMEDI_CB_OVERFLOW;
756 comedi_error(dev, "buffer overflow");
759 /* Check for end of acquisition. */
760 if (!subpriv->continuous) {
761 /* stop_src == TRIG_COUNT */
762 if (subpriv->stopcount > 0) {
763 subpriv->stopcount--;
764 if (subpriv->stopcount == 0) {
767 dio200_stop_intr(dev,
775 comedi_spin_unlock_irqrestore(&subpriv->spinlock, flags);
777 if (oldevents != s->async->events) {
778 comedi_event(dev, s);
781 return (triggered != 0);
785 * 'cancel' function for an 'INTERRUPT' subdevice.
787 static int dio200_subdev_intr_cancel(comedi_device * dev, comedi_subdevice * s)
789 dio200_subdev_intr *subpriv = s->private;
792 comedi_spin_lock_irqsave(&subpriv->spinlock, flags);
793 if (subpriv->active) {
794 dio200_stop_intr(dev, s);
796 comedi_spin_unlock_irqrestore(&subpriv->spinlock, flags);
802 * 'do_cmdtest' function for an 'INTERRUPT' subdevice.
805 dio200_subdev_intr_cmdtest(comedi_device * dev, comedi_subdevice * s,
811 /* step 1: make sure trigger sources are trivially valid */
813 tmp = cmd->start_src;
814 cmd->start_src &= (TRIG_NOW | TRIG_INT);
815 if (!cmd->start_src || tmp != cmd->start_src)
818 tmp = cmd->scan_begin_src;
819 cmd->scan_begin_src &= TRIG_EXT;
820 if (!cmd->scan_begin_src || tmp != cmd->scan_begin_src)
823 tmp = cmd->convert_src;
824 cmd->convert_src &= TRIG_NOW;
825 if (!cmd->convert_src || tmp != cmd->convert_src)
828 tmp = cmd->scan_end_src;
829 cmd->scan_end_src &= TRIG_COUNT;
830 if (!cmd->scan_end_src || tmp != cmd->scan_end_src)
834 cmd->stop_src &= (TRIG_COUNT | TRIG_NONE);
835 if (!cmd->stop_src || tmp != cmd->stop_src)
841 /* step 2: make sure trigger sources are unique and mutually compatible */
843 /* these tests are true if more than one _src bit is set */
844 if ((cmd->start_src & (cmd->start_src - 1)) != 0)
846 if ((cmd->scan_begin_src & (cmd->scan_begin_src - 1)) != 0)
848 if ((cmd->convert_src & (cmd->convert_src - 1)) != 0)
850 if ((cmd->scan_end_src & (cmd->scan_end_src - 1)) != 0)
852 if ((cmd->stop_src & (cmd->stop_src - 1)) != 0)
858 /* step 3: make sure arguments are trivially compatible */
860 /* cmd->start_src == TRIG_NOW || cmd->start_src == TRIG_INT */
861 if (cmd->start_arg != 0) {
866 /* cmd->scan_begin_src == TRIG_EXT */
867 if (cmd->scan_begin_arg != 0) {
868 cmd->scan_begin_arg = 0;
872 /* cmd->convert_src == TRIG_NOW */
873 if (cmd->convert_arg != 0) {
874 cmd->convert_arg = 0;
878 /* cmd->scan_end_src == TRIG_COUNT */
879 if (cmd->scan_end_arg != cmd->chanlist_len) {
880 cmd->scan_end_arg = cmd->chanlist_len;
884 switch (cmd->stop_src) {
886 /* any count allowed */
889 if (cmd->stop_arg != 0) {
901 /* step 4: fix up any arguments */
903 /* if (err) return 4; */
909 * 'do_cmd' function for an 'INTERRUPT' subdevice.
911 static int dio200_subdev_intr_cmd(comedi_device * dev, comedi_subdevice * s)
913 comedi_cmd *cmd = &s->async->cmd;
914 dio200_subdev_intr *subpriv = s->private;
918 comedi_spin_lock_irqsave(&subpriv->spinlock, flags);
921 /* Set up end of acquisition. */
922 switch (cmd->stop_src) {
924 subpriv->continuous = 0;
925 subpriv->stopcount = cmd->stop_arg;
929 subpriv->continuous = 1;
930 subpriv->stopcount = 0;
934 /* Set up start of acquisition. */
935 switch (cmd->start_src) {
937 s->async->inttrig = dio200_inttrig_start_intr;
941 event = dio200_start_intr(dev, s);
944 comedi_spin_unlock_irqrestore(&subpriv->spinlock, flags);
947 comedi_event(dev, s);
954 * This function initializes an 'INTERRUPT' subdevice.
957 dio200_subdev_intr_init(comedi_device * dev, comedi_subdevice * s,
958 unsigned long iobase, unsigned valid_isns, int has_int_sce)
960 dio200_subdev_intr *subpriv;
962 subpriv = kzalloc(sizeof(*subpriv), GFP_KERNEL);
964 printk(KERN_ERR "comedi%d: error! out of memory!\n",
968 subpriv->iobase = iobase;
969 subpriv->has_int_sce = has_int_sce;
970 subpriv->valid_isns = valid_isns;
971 spin_lock_init(&subpriv->spinlock);
974 outb(0, subpriv->iobase); /* Disable interrupt sources. */
977 s->private = subpriv;
978 s->type = COMEDI_SUBD_DI;
979 s->subdev_flags = SDF_READABLE | SDF_CMD_READ;
981 s->n_chan = DIO200_MAX_ISNS;
982 s->len_chanlist = DIO200_MAX_ISNS;
984 /* No interrupt source register. Support single channel. */
988 s->range_table = &range_digital;
990 s->insn_bits = dio200_subdev_intr_insn_bits;
991 s->do_cmdtest = dio200_subdev_intr_cmdtest;
992 s->do_cmd = dio200_subdev_intr_cmd;
993 s->cancel = dio200_subdev_intr_cancel;
999 * This function cleans up an 'INTERRUPT' subdevice.
1002 dio200_subdev_intr_cleanup(comedi_device * dev, comedi_subdevice * s)
1004 dio200_subdev_intr *subpriv = s->private;
1012 * Interrupt service routine.
1014 static irqreturn_t dio200_interrupt(int irq, void *d PT_REGS_ARG)
1016 comedi_device *dev = d;
1019 if (!dev->attached) {
1023 if (devpriv->intr_sd >= 0) {
1024 handled = dio200_handle_read_intr(dev,
1025 dev->subdevices + devpriv->intr_sd);
1030 return IRQ_RETVAL(handled);
1034 * Handle 'insn_read' for an '8254' counter subdevice.
1037 dio200_subdev_8254_read(comedi_device * dev, comedi_subdevice * s,
1038 comedi_insn * insn, lsampl_t * data)
1040 dio200_subdev_8254 *subpriv = s->private;
1041 int chan = CR_CHAN(insn->chanspec);
1042 unsigned long flags;
1047 comedi_spin_lock_irqsave(&subpriv->spinlock, flags);
1048 data[0] = i8254_read(subpriv->iobase, 0, chan);
1049 comedi_spin_unlock_irqrestore(&subpriv->spinlock, flags);
1055 * Handle 'insn_write' for an '8254' counter subdevice.
1058 dio200_subdev_8254_write(comedi_device * dev, comedi_subdevice * s,
1059 comedi_insn * insn, lsampl_t * data)
1061 dio200_subdev_8254 *subpriv = s->private;
1062 int chan = CR_CHAN(insn->chanspec);
1063 unsigned long flags;
1068 comedi_spin_lock_irqsave(&subpriv->spinlock, flags);
1069 i8254_write(subpriv->iobase, 0, chan, data[0]);
1070 comedi_spin_unlock_irqrestore(&subpriv->spinlock, flags);
1076 * Set gate source for an '8254' counter subdevice channel.
1079 dio200_set_gate_src(dio200_subdev_8254 * subpriv, unsigned int counter_number,
1080 unsigned int gate_src)
1084 if (!subpriv->has_clk_gat_sce)
1086 if (counter_number > 2)
1091 subpriv->gate_src[counter_number] = gate_src;
1092 byte = GAT_SCE(subpriv->which, counter_number, gate_src);
1093 outb(byte, subpriv->gat_sce_iobase);
1099 * Get gate source for an '8254' counter subdevice channel.
1102 dio200_get_gate_src(dio200_subdev_8254 * subpriv, unsigned int counter_number)
1104 if (!subpriv->has_clk_gat_sce)
1106 if (counter_number > 2)
1109 return subpriv->gate_src[counter_number];
1113 * Set clock source for an '8254' counter subdevice channel.
1116 dio200_set_clock_src(dio200_subdev_8254 * subpriv, unsigned int counter_number,
1117 unsigned int clock_src)
1121 if (!subpriv->has_clk_gat_sce)
1123 if (counter_number > 2)
1128 subpriv->clock_src[counter_number] = clock_src;
1129 byte = CLK_SCE(subpriv->which, counter_number, clock_src);
1130 outb(byte, subpriv->clk_sce_iobase);
1136 * Get clock source for an '8254' counter subdevice channel.
1139 dio200_get_clock_src(dio200_subdev_8254 * subpriv, unsigned int counter_number,
1140 lsampl_t * period_ns)
1144 if (!subpriv->has_clk_gat_sce)
1146 if (counter_number > 2)
1149 clock_src = subpriv->clock_src[counter_number];
1150 *period_ns = clock_period[clock_src];
1155 * Handle 'insn_config' for an '8254' counter subdevice.
1158 dio200_subdev_8254_config(comedi_device * dev, comedi_subdevice * s,
1159 comedi_insn * insn, lsampl_t * data)
1161 dio200_subdev_8254 *subpriv = s->private;
1163 int chan = CR_CHAN(insn->chanspec);
1164 unsigned long flags;
1166 comedi_spin_lock_irqsave(&subpriv->spinlock, flags);
1168 case INSN_CONFIG_SET_COUNTER_MODE:
1169 ret = i8254_set_mode(subpriv->iobase, 0, chan, data[1]);
1173 case INSN_CONFIG_8254_READ_STATUS:
1174 data[1] = i8254_status(subpriv->iobase, 0, chan);
1176 case INSN_CONFIG_SET_GATE_SRC:
1177 ret = dio200_set_gate_src(subpriv, chan, data[2]);
1181 case INSN_CONFIG_GET_GATE_SRC:
1182 ret = dio200_get_gate_src(subpriv, chan);
1189 case INSN_CONFIG_SET_CLOCK_SRC:
1190 ret = dio200_set_clock_src(subpriv, chan, data[1]);
1194 case INSN_CONFIG_GET_CLOCK_SRC:
1195 ret = dio200_get_clock_src(subpriv, chan, &data[2]);
1206 comedi_spin_unlock_irqrestore(&subpriv->spinlock, flags);
1207 return ret < 0 ? ret : insn->n;
1211 * This function initializes an '8254' counter subdevice.
1213 * Note: iobase is the base address of the board, not the subdevice;
1214 * offset is the offset to the 8254 chip.
1217 dio200_subdev_8254_init(comedi_device * dev, comedi_subdevice * s,
1218 unsigned long iobase, unsigned offset, int has_clk_gat_sce)
1220 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(comedi_device * dev, comedi_subdevice * s)
1273 dio200_subdev_intr *subpriv = s->private;
1281 * Attach is called by the Comedi core to configure the driver
1282 * for a particular board. If you specified a board_name array
1283 * in the driver structure, dev->board_ptr contains that
1286 static int dio200_attach(comedi_device * dev, comedi_devconfig * it)
1288 comedi_subdevice *s;
1289 unsigned long iobase = 0;
1290 unsigned int irq = 0;
1291 #ifdef CONFIG_COMEDI_PCI
1292 struct pci_dev *pci_dev = NULL;
1293 int bus = 0, slot = 0;
1295 const dio200_layout *layout;
1301 printk(KERN_DEBUG "comedi%d: %s: attach\n", dev->minor,
1302 DIO200_DRIVER_NAME);
1304 if ((ret = alloc_private(dev, sizeof(dio200_private))) < 0) {
1305 printk(KERN_ERR "comedi%d: error! out of memory!\n",
1310 /* Process options. */
1311 switch (thisboard->bustype) {
1313 iobase = it->options[0];
1314 irq = it->options[1];
1317 #ifdef CONFIG_COMEDI_PCI
1319 bus = it->options[0];
1320 slot = it->options[1];
1323 if ((ret = dio200_find_pci(dev, bus, slot, &pci_dev)) < 0)
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);
1358 dev->iobase = iobase;
1360 layout = thislayout;
1361 if ((ret = alloc_subdevices(dev, layout->n_subdevs)) < 0) {
1362 printk(KERN_ERR "comedi%d: error! out of memory!\n",
1367 for (n = 0; n < dev->n_subdevices; n++) {
1368 s = &dev->subdevices[n];
1369 switch (layout->sdtype[n]) {
1371 /* counter subdevice (8254) */
1372 ret = dio200_subdev_8254_init(dev, s, iobase,
1373 layout->sdinfo[n], layout->has_clk_gat_sce);
1379 /* digital i/o subdevice (8255) */
1380 ret = subdev_8255_init(dev, s, 0,
1381 iobase + layout->sdinfo[n]);
1387 /* 'INTERRUPT' subdevice */
1389 ret = dio200_subdev_intr_init(dev, s,
1390 iobase + DIO200_INT_SCE,
1391 layout->sdinfo[n], layout->has_int_sce);
1395 devpriv->intr_sd = n;
1397 s->type = COMEDI_SUBD_UNUSED;
1401 s->type = COMEDI_SUBD_UNUSED;
1406 sdx = devpriv->intr_sd;
1407 if (sdx >= 0 && sdx < dev->n_subdevices) {
1408 dev->read_subdev = &dev->subdevices[sdx];
1411 dev->board_name = thisboard->name;
1414 unsigned long flags = share_irq ? IRQF_SHARED : 0;
1416 if (comedi_request_irq(irq, dio200_interrupt, flags,
1417 DIO200_DRIVER_NAME, dev) >= 0) {
1421 "comedi%d: warning! irq %u unavailable!\n",
1426 printk(KERN_INFO "comedi%d: %s ", dev->minor, dev->board_name);
1427 if (thisboard->bustype == isa_bustype) {
1428 printk("(base %#lx) ", iobase);
1430 #ifdef CONFIG_COMEDI_PCI
1431 printk("(pci %s) ", pci_name(pci_dev));
1435 printk("(irq %u%s) ", irq, (dev->irq ? "" : " UNAVAILABLE"));
1437 printk("(no irq) ");
1440 printk("attached\n");
1446 * _detach is called to deconfigure a device. It should deallocate
1448 * This function is also called when _attach() fails, so it should be
1449 * careful not to release resources that were not necessarily
1450 * allocated by _attach(). dev->private and dev->subdevices are
1451 * deallocated automatically by the core.
1453 static int dio200_detach(comedi_device * dev)
1455 const dio200_layout *layout;
1458 printk(KERN_DEBUG "comedi%d: %s: detach\n", dev->minor,
1459 DIO200_DRIVER_NAME);
1462 comedi_free_irq(dev->irq, dev);
1464 if (dev->subdevices) {
1465 layout = thislayout;
1466 for (n = 0; n < dev->n_subdevices; n++) {
1467 comedi_subdevice *s = &dev->subdevices[n];
1468 switch (layout->sdtype[n]) {
1470 dio200_subdev_8254_cleanup(dev, s);
1473 subdev_8255_cleanup(dev, s);
1476 dio200_subdev_intr_cleanup(dev, s);
1484 #ifdef CONFIG_COMEDI_PCI
1485 if (devpriv->pci_dev) {
1487 comedi_pci_disable(devpriv->pci_dev);
1489 pci_dev_put(devpriv->pci_dev);
1494 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);