--- /dev/null
+/*
+ comedi/drivers/adq12b.c
+ driver for MicroAxial ADQ12-B data acquisition and control card
+
+ COMEDI - Linux Control and Measurement Device Interface
+ Copyright (C) 2000 David A. Schleef <ds@schleef.org>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+/*
+Driver: adq12b.o
+Description: driver for MicroAxial ADQ12-B data acquisition and control card
+Devices: (MicroAxial) ADQ12-B [adq12b]
+Author: jeremy theler <thelerg@ib.cnea.gov.ar>
+Updated: Mon, 28 Oct 2007 14:58:02 -0300
+Status: experimental
+
+Driver for the acquisition card ADQ12-B.
+
+ - Analog input is subdevice 0 (16 channels single-ended or 8 differential)
+ - Digital input is subdevice 1 (5 channels)
+ - Digital output is subdevice 1 (8 channels)
+ - The PACER is not supported in this version
+
+If you do not specify any options, they will default to
+
+ # comedi_config /dev/comedi0 adq12b 0x300,0,0
+
+ option 1: I/O base address. The following table is provided as a help
+ of the hardware jumpers.
+
+ address jumper JADR
+ 0x300 1 (factory default)
+ 0x320 2
+ 0x340 3
+ 0x360 4
+ 0x380 5
+ 0x3A0 6
+
+ option 2: unipolar/bipolar ADC selection: 0 -> bipolar, 1 -> unipolar
+
+ selection comedi_config option JUB
+ bipolar 0 2-3 (factory default)
+ unipolar 1 1-2
+
+ option 3: single-ended/differential AI selection: 0 -> SE, 1 -> differential
+
+ selection comedi_config option JCHA JCHB
+ single-ended 0 1-2 1-2 (factory default)
+ differential 1 2-3 2-3
+
+
+ written by jeremy theler <thelerg@ib.cnea.gov.ar>
+
+ instituto balseiro
+ comision nacional de energia atomica
+ universidad nacional de cuyo
+ argentina
+
+ v0.1 13-oct-2007
+ + first try
+
+
+*/
+
+#include <linux/comedidev.h>
+
+// address scheme (page 2.17 of the manual)
+#define ADQ12B_SIZE 16
+
+#define ADQ12B_CTREG 0x00
+#define ADQ12B_STINR 0x00
+#define ADQ12B_OUTBR 0x04
+#define ADQ12B_ADLOW 0x08
+#define ADQ12B_ADHIG 0x09
+#define ADQ12B_CONT0 0x0c
+#define ADQ12B_CONT1 0x0d
+#define ADQ12B_CONT2 0x0e
+#define ADQ12B_COWORD 0x0f
+
+// mask of the bit at STINR to check end of conversion
+#define ADQ12B_EOC 0x20
+
+#define TIMEOUT 20
+
+// available ranges through the PGA gains
+static const comedi_lrange range_adq12b_ai_bipolar = { 4, {
+ BIP_RANGE( 5 ),
+ BIP_RANGE( 2 ),
+ BIP_RANGE( 1 ),
+ BIP_RANGE( 0.5 )
+}};
+
+static const comedi_lrange range_adq12b_ai_unipolar = { 4, {
+ UNI_RANGE( 5 ),
+ UNI_RANGE( 2 ),
+ UNI_RANGE( 1 ),
+ UNI_RANGE( 0.5 )
+}};
+
+
+
+typedef struct adq12b_board_struct{
+ const char *name;
+ int ai_se_chans;
+ int ai_diff_chans;
+ int ai_bits;
+ int di_chans;
+ int do_chans;
+}adq12b_board;
+
+static const adq12b_board adq12b_boards[] = {
+ {
+ name: "adq12b",
+ ai_se_chans: 16,
+ ai_diff_chans: 8,
+ ai_bits: 12,
+ di_chans: 5,
+ do_chans: 8
+ }
+// potentially, more adq-based deviced will be added
+/*,
+ name: "adq12b",
+ ai_chans: 16, // this is just for reference, hardcoded again later
+ ai_bits: 12,
+ di_chans: 8,
+ do_chans: 5
+ }*/
+};
+
+#define thisboard ((const adq12b_board *)dev->board_ptr)
+
+typedef struct{
+ int unipolar; /* option 2 of comedi_config (1 is iobase) */
+ int differential; /* option 3 of comedi_config */
+ int last_channel;
+ int last_range;
+ lsampl_t digital_state;
+ }adq12b_private;
+
+#define devpriv ((adq12b_private *)dev->private)
+
+/*
+ * The comedi_driver structure tells the Comedi core module
+ * which functions to call to configure/deconfigure (attach/detach)
+ * the board, and also about the kernel module that contains
+ * the device code.
+ */
+static int adq12b_attach(comedi_device *dev,comedi_devconfig *it);
+static int adq12b_detach(comedi_device *dev);
+static comedi_driver driver_adq12b={
+ driver_name: "adq12b",
+ module: THIS_MODULE,
+ attach: adq12b_attach,
+ detach: adq12b_detach,
+ board_name: &adq12b_boards[0].name,
+ offset: sizeof(adq12b_board),
+ num_names: sizeof(adq12b_boards) / sizeof(adq12b_board),
+};
+
+static int adq12b_ai_rinsn(comedi_device *dev,comedi_subdevice *s,comedi_insn *insn,lsampl_t *data);
+static int adq12b_di_insn_bits(comedi_device *dev,comedi_subdevice *s, comedi_insn *insn,lsampl_t *data);
+static int adq12b_do_insn_bits(comedi_device *dev,comedi_subdevice *s, comedi_insn *insn,lsampl_t *data);
+
+/*
+ * Attach is called by the Comedi core to configure the driver
+ * for a particular board. If you specified a board_name array
+ * in the driver structure, dev->board_ptr contains that
+ * address.
+ */
+static int adq12b_attach(comedi_device *dev,comedi_devconfig *it)
+{
+ comedi_subdevice *s;
+ unsigned long iobase;
+ int unipolar, differential;
+
+ iobase = it->options[0];
+ unipolar = it->options[1];
+ differential = it->options[2];
+
+ printk("comedi%d: adq12b called with options base=0x%03lx, %s and %s\n",dev->minor, iobase, (unipolar==1)?"unipolar":"bipolar", (differential==1)?"differential":"single-ended");
+
+ /* if no address was specified, try the default 0x300 */
+ if (iobase == 0) {
+ printk("comedi%d: adq12b warning: I/O base address not specified. Trying the default 0x300.\n", dev->minor);
+ iobase = 0x300;
+ }
+
+ printk("comedi%d: adq12b: 0x%04lx ", dev->minor, iobase);
+ if (!request_region(iobase, ADQ12B_SIZE, "adq12b")) {
+ printk("I/O port conflict\n");
+ return -EIO;
+ }
+ dev->iobase = iobase;
+
+/*
+ * Initialize dev->board_name. Note that we can use the "thisboard"
+ * macro now, since we just initialized it in the last line.
+ */
+ dev->board_name = thisboard->name;
+
+/*
+ * Allocate the private structure area. alloc_private() is a
+ * convenient macro defined in comedidev.h.
+ */
+ if(alloc_private(dev, sizeof(adq12b_private)) < 0)
+ return -ENOMEM;
+
+/* fill in devpriv structure */
+ devpriv->unipolar = unipolar;
+ devpriv->differential = differential;
+ devpriv->digital_state = 0;
+/* initialize channel and range to -1 so we make sure we always write
+ at least once to the CTREG in the instruction */
+ devpriv->last_channel = -1;
+ devpriv->last_range = -1;
+
+
+/*
+ * Allocate the subdevice structures. alloc_subdevice() is a
+ * convenient macro defined in comedidev.h.
+ */
+ if(alloc_subdevices(dev, 3)<0)
+ return -ENOMEM;
+
+ s = dev->subdevices+0;
+ /* analog input subdevice */
+ s->type = COMEDI_SUBD_AI;
+ if (differential) {
+ s->subdev_flags = SDF_READABLE|SDF_GROUND|SDF_DIFF;
+ s->n_chan = thisboard->ai_diff_chans;
+ } else {
+ s->subdev_flags = SDF_READABLE|SDF_GROUND;
+ s->n_chan = thisboard->ai_se_chans;
+ }
+
+ if (unipolar) {
+ s->range_table = &range_adq12b_ai_unipolar;
+ } else {
+ s->range_table = &range_adq12b_ai_bipolar;
+ }
+
+ s->maxdata = (1 << thisboard->ai_bits)-1;
+
+
+ s->len_chanlist = 4; /* This is the maximum chanlist length that
+ the board can handle */
+ s->insn_read = adq12b_ai_rinsn;
+
+
+ s = dev->subdevices+1;
+ /* digital input subdevice */
+ s->type = COMEDI_SUBD_DI;
+ s->subdev_flags = SDF_READABLE;
+ s->n_chan=thisboard->di_chans;
+ s->maxdata = 1;
+ s->range_table = &range_digital;
+ s->insn_bits = adq12b_di_insn_bits;
+
+ s = dev->subdevices+2;
+ /* digital output subdevice */
+ s->type = COMEDI_SUBD_DO;
+ s->subdev_flags = SDF_WRITABLE;
+ s->n_chan = thisboard->do_chans;
+ s->maxdata = 1;
+ s->range_table = &range_digital;
+ s->insn_bits = adq12b_do_insn_bits;
+
+
+ printk("attached\n");
+
+ return 0;
+}
+
+
+/*
+ * _detach is called to deconfigure a device. It should deallocate
+ * resources.
+ * This function is also called when _attach() fails, so it should be
+ * careful not to release resources that were not necessarily
+ * allocated by _attach(). dev->private and dev->subdevices are
+ * deallocated automatically by the core.
+ */
+static int adq12b_detach(comedi_device *dev)
+{
+ if (dev->iobase)
+ release_region(dev->iobase, ADQ12B_SIZE);
+
+ kfree(devpriv);
+
+ printk("comedi%d: adq12b: removed\n",dev->minor);
+
+ return 0;
+}
+
+/*
+ * "instructions" read/write data in "one-shot" or "software-triggered"
+ * mode.
+ */
+
+static int adq12b_ai_rinsn(comedi_device *dev,comedi_subdevice *s,comedi_insn *insn,lsampl_t *data)
+{
+ int n, i;
+ int range, channel;
+ unsigned char hi, lo, status;
+
+ /* change channel and range only if it is different from the previous */
+ range = CR_RANGE(insn->chanspec);
+ channel = CR_CHAN(insn->chanspec);
+ if (channel != devpriv->last_channel || range != devpriv->last_range) {
+ outb((range << 4) | channel, dev->iobase + ADQ12B_CTREG);
+ comedi_udelay(50); /* wait for the mux to settle */
+ }
+
+ /* trigger conversion */
+ status = inb(dev->iobase + ADQ12B_ADLOW);
+
+ /* convert n samples */
+ for(n=0; n < insn->n; n++){
+
+ /* wait for end of convertion */
+ i = 0;
+ do {
+// comedi_udelay(1);
+ status = inb(dev->iobase + ADQ12B_STINR);
+ status = status & ADQ12B_EOC;
+ } while (status == 0 && ++i < TIMEOUT);
+// } while (++i < 10);
+
+ /* read data */
+ hi = inb(dev->iobase + ADQ12B_ADHIG);
+ lo = inb(dev->iobase + ADQ12B_ADLOW);
+
+ //rt_printk("debug: chan=%d range=%d status=%d hi=%d lo=%d\n", channel, range, status, hi, lo);
+ data[n] = (hi << 8) | lo;
+
+ }
+
+ /* return the number of samples read/written */
+ return n;
+}
+
+
+static int adq12b_di_insn_bits(comedi_device *dev,comedi_subdevice *s, comedi_insn *insn,lsampl_t *data)
+{
+
+ /* only bits 0-4 have information about digital inputs */
+ data[1] = (inb(dev->iobase+ADQ12B_STINR) & (0x1f));
+
+ return 2;
+}
+
+
+static int adq12b_do_insn_bits(comedi_device *dev,comedi_subdevice *s, comedi_insn *insn,lsampl_t *data)
+{
+ int channel;
+
+ for (channel = 0; channel < 8; channel++)
+ if (((data[0]>>channel) & 0x01) != 0)
+ outb((((data[1]>>channel)&0x01)<<3) | channel, dev->iobase + ADQ12B_OUTBR);
+
+ /* store information to retrieve when asked for reading */
+ if (data[0]) {
+ devpriv->digital_state &= ~data[0];
+ devpriv->digital_state |= (data[0]&data[1]);
+ }
+
+ data[1] = devpriv->digital_state;
+
+ return 2;
+}
+
+
+/*
+ * A convenient macro that defines init_module() and cleanup_module(),
+ * as necessary.
+ */
+COMEDI_INITCLEANUP(driver_adq12b);
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