--- /dev/null
+/*
+ * pcl726.c
+ * Comedi driver for 6/12-Channel D/A Output and DIO cards
+ *
+ * COMEDI - Linux Control and Measurement Device Interface
+ * Copyright (C) 1998 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.
+ */
+
+/*
+ * Driver: pcl726
+ * Description: Advantech PCL-726 & compatibles
+ * Author: David A. Schleef <ds@schleef.org>
+ * Status: untested
+ * Devices: [Advantech] PCL-726 (pcl726), PCL-727 (pcl727), PCL-728 (pcl728),
+ * [ADLink] ACL-6126 (acl6126), ACL-6128 (acl6128)
+ *
+ * Configuration Options:
+ * [0] - IO Base
+ * [1] - IRQ (ACL-6126 only)
+ * [2] - D/A output range for channel 0
+ * [3] - D/A output range for channel 1
+ *
+ * Boards with > 2 analog output channels:
+ * [4] - D/A output range for channel 2
+ * [5] - D/A output range for channel 3
+ * [6] - D/A output range for channel 4
+ * [7] - D/A output range for channel 5
+ *
+ * Boards with > 6 analog output channels:
+ * [8] - D/A output range for channel 6
+ * [9] - D/A output range for channel 7
+ * [10] - D/A output range for channel 8
+ * [11] - D/A output range for channel 9
+ * [12] - D/A output range for channel 10
+ * [13] - D/A output range for channel 11
+ *
+ * For PCL-726 the D/A output ranges are:
+ * 0: 0-5V, 1: 0-10V, 2: +/-5V, 3: +/-10V, 4: 4-20mA, 5: unknown
+ *
+ * For PCL-727:
+ * 0: 0-5V, 1: 0-10V, 2: +/-5V, 3: 4-20mA
+ *
+ * For PCL-728 and ACL-6128:
+ * 0: 0-5V, 1: 0-10V, 2: +/-5V, 3: +/-10V, 4: 4-20mA, 5: 0-20mA
+ *
+ * For ACL-6126:
+ * 0: 0-5V, 1: 0-10V, 2: +/-5V, 3: +/-10V, 4: 4-20mA
+ */
+
+#include <linux/module.h>
+#include <linux/interrupt.h>
+
+#include "../comedidev.h"
+
+#define PCL726_AO_MSB_REG(x) (0x00 + ((x) * 2))
+#define PCL726_AO_LSB_REG(x) (0x01 + ((x) * 2))
+#define PCL726_DO_MSB_REG 0x0c
+#define PCL726_DO_LSB_REG 0x0d
+#define PCL726_DI_MSB_REG 0x0e
+#define PCL726_DI_LSB_REG 0x0f
+
+#define PCL727_DI_MSB_REG 0x00
+#define PCL727_DI_LSB_REG 0x01
+#define PCL727_DO_MSB_REG 0x18
+#define PCL727_DO_LSB_REG 0x19
+
+static const struct comedi_lrange *const rangelist_726[] = {
+ &range_unipolar5,
+ &range_unipolar10,
+ &range_bipolar5,
+ &range_bipolar10,
+ &range_4_20mA,
+ &range_unknown
+};
+
+static const struct comedi_lrange *const rangelist_727[] = {
+ &range_unipolar5,
+ &range_unipolar10,
+ &range_bipolar5,
+ &range_4_20mA
+};
+
+static const struct comedi_lrange *const rangelist_728[] = {
+ &range_unipolar5,
+ &range_unipolar10,
+ &range_bipolar5,
+ &range_bipolar10,
+ &range_4_20mA,
+ &range_0_20mA
+};
+
+struct pcl726_board {
+ const char *name;
+ unsigned long io_len;
+ unsigned int irq_mask;
+ const struct comedi_lrange *const *ao_ranges;
+ int ao_num_ranges;
+ int ao_nchan;
+ unsigned int have_dio:1;
+ unsigned int is_pcl727:1;
+};
+
+static const struct pcl726_board pcl726_boards[] = {
+ {
+ .name = "pcl726",
+ .io_len = 0x10,
+ .ao_ranges = &rangelist_726[0],
+ .ao_num_ranges = ARRAY_SIZE(rangelist_726),
+ .ao_nchan = 6,
+ .have_dio = 1,
+ }, {
+ .name = "pcl727",
+ .io_len = 0x20,
+ .ao_ranges = &rangelist_727[0],
+ .ao_num_ranges = ARRAY_SIZE(rangelist_727),
+ .ao_nchan = 12,
+ .have_dio = 1,
+ .is_pcl727 = 1,
+ }, {
+ .name = "pcl728",
+ .io_len = 0x08,
+ .ao_num_ranges = ARRAY_SIZE(rangelist_728),
+ .ao_ranges = &rangelist_728[0],
+ .ao_nchan = 2,
+ }, {
+ .name = "acl6126",
+ .io_len = 0x10,
+ .irq_mask = 0x96e8,
+ .ao_num_ranges = ARRAY_SIZE(rangelist_726),
+ .ao_ranges = &rangelist_726[0],
+ .ao_nchan = 6,
+ .have_dio = 1,
+ }, {
+ .name = "acl6128",
+ .io_len = 0x08,
+ .ao_num_ranges = ARRAY_SIZE(rangelist_728),
+ .ao_ranges = &rangelist_728[0],
+ .ao_nchan = 2,
+ },
+};
+
+struct pcl726_private {
+ const struct comedi_lrange *rangelist[12];
+ unsigned int cmd_running:1;
+};
+
+static int pcl726_intr_insn_bits(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned int *data)
+{
+ data[1] = 0;
+ return insn->n;
+}
+
+static int pcl726_intr_cmdtest(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_cmd *cmd)
+{
+ int err = 0;
+
+ /* Step 1 : check if triggers are trivially valid */
+
+ err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW);
+ err |= comedi_check_trigger_src(&cmd->scan_begin_src, TRIG_EXT);
+ err |= comedi_check_trigger_src(&cmd->convert_src, TRIG_FOLLOW);
+ err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
+ err |= comedi_check_trigger_src(&cmd->stop_src, TRIG_NONE);
+
+ if (err)
+ return 1;
+
+ /* Step 2a : make sure trigger sources are unique */
+ /* Step 2b : and mutually compatible */
+
+ /* Step 3: check if arguments are trivially valid */
+
+ err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0);
+ err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
+ err |= comedi_check_trigger_arg_is(&cmd->convert_arg, 0);
+ err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg,
+ cmd->chanlist_len);
+ err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0);
+
+ if (err)
+ return 3;
+
+ /* Step 4: fix up any arguments */
+
+ /* Step 5: check channel list if it exists */
+
+ return 0;
+}
+
+static int pcl726_intr_cmd(struct comedi_device *dev,
+ struct comedi_subdevice *s)
+{
+ struct pcl726_private *devpriv = dev->private;
+
+ devpriv->cmd_running = 1;
+
+ return 0;
+}
+
+static int pcl726_intr_cancel(struct comedi_device *dev,
+ struct comedi_subdevice *s)
+{
+ struct pcl726_private *devpriv = dev->private;
+
+ devpriv->cmd_running = 0;
+
+ return 0;
+}
+
+static irqreturn_t pcl726_interrupt(int irq, void *d)
+{
+ struct comedi_device *dev = d;
+ struct comedi_subdevice *s = dev->read_subdev;
+ struct pcl726_private *devpriv = dev->private;
+
+ if (devpriv->cmd_running) {
+ pcl726_intr_cancel(dev, s);
+
+ comedi_buf_write_samples(s, &s->state, 1);
+ comedi_handle_events(dev, s);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static int pcl726_ao_insn_write(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned int *data)
+{
+ unsigned int chan = CR_CHAN(insn->chanspec);
+ unsigned int range = CR_RANGE(insn->chanspec);
+ int i;
+
+ for (i = 0; i < insn->n; i++) {
+ unsigned int val = data[i];
+
+ s->readback[chan] = val;
+
+ /* bipolar data to the DAC is two's complement */
+ if (comedi_chan_range_is_bipolar(s, chan, range))
+ val = comedi_offset_munge(s, val);
+
+ /* order is important, MSB then LSB */
+ outb((val >> 8) & 0xff, dev->iobase + PCL726_AO_MSB_REG(chan));
+ outb(val & 0xff, dev->iobase + PCL726_AO_LSB_REG(chan));
+ }
+
+ return insn->n;
+}
+
+static int pcl726_di_insn_bits(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned int *data)
+{
+ const struct pcl726_board *board = dev->board_ptr;
+ unsigned int val;
+
+ if (board->is_pcl727) {
+ val = inb(dev->iobase + PCL727_DI_LSB_REG);
+ val |= (inb(dev->iobase + PCL727_DI_MSB_REG) << 8);
+ } else {
+ val = inb(dev->iobase + PCL726_DI_LSB_REG);
+ val |= (inb(dev->iobase + PCL726_DI_MSB_REG) << 8);
+ }
+
+ data[1] = val;
+
+ return insn->n;
+}
+
+static int pcl726_do_insn_bits(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned int *data)
+{
+ const struct pcl726_board *board = dev->board_ptr;
+ unsigned long io = dev->iobase;
+ unsigned int mask;
+
+ mask = comedi_dio_update_state(s, data);
+ if (mask) {
+ if (board->is_pcl727) {
+ if (mask & 0x00ff)
+ outb(s->state & 0xff, io + PCL727_DO_LSB_REG);
+ if (mask & 0xff00)
+ outb((s->state >> 8), io + PCL727_DO_MSB_REG);
+ } else {
+ if (mask & 0x00ff)
+ outb(s->state & 0xff, io + PCL726_DO_LSB_REG);
+ if (mask & 0xff00)
+ outb((s->state >> 8), io + PCL726_DO_MSB_REG);
+ }
+ }
+
+ data[1] = s->state;
+
+ return insn->n;
+}
+
+static int pcl726_attach(struct comedi_device *dev,
+ struct comedi_devconfig *it)
+{
+ const struct pcl726_board *board = dev->board_ptr;
+ struct pcl726_private *devpriv;
+ struct comedi_subdevice *s;
+ int subdev;
+ int ret;
+ int i;
+
+ ret = comedi_request_region(dev, it->options[0], board->io_len);
+ if (ret)
+ return ret;
+
+ devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
+ if (!devpriv)
+ return -ENOMEM;
+
+ /*
+ * Hook up the external trigger source interrupt only if the
+ * user config option is valid and the board supports interrupts.
+ */
+ if (it->options[1] && (board->irq_mask & (1 << it->options[1]))) {
+ ret = request_irq(it->options[1], pcl726_interrupt, 0,
+ dev->board_name, dev);
+ if (ret == 0) {
+ /* External trigger source is from Pin-17 of CN3 */
+ dev->irq = it->options[1];
+ }
+ }
+
+ /* setup the per-channel analog output range_table_list */
+ for (i = 0; i < 12; i++) {
+ unsigned int opt = it->options[2 + i];
+
+ if (opt < board->ao_num_ranges && i < board->ao_nchan)
+ devpriv->rangelist[i] = board->ao_ranges[opt];
+ else
+ devpriv->rangelist[i] = &range_unknown;
+ }
+
+ subdev = board->have_dio ? 3 : 1;
+ if (dev->irq)
+ subdev++;
+ ret = comedi_alloc_subdevices(dev, subdev);
+ if (ret)
+ return ret;
+
+ subdev = 0;
+
+ /* Analog Output subdevice */
+ s = &dev->subdevices[subdev++];
+ s->type = COMEDI_SUBD_AO;
+ s->subdev_flags = SDF_WRITABLE | SDF_GROUND;
+ s->n_chan = board->ao_nchan;
+ s->maxdata = 0x0fff;
+ s->range_table_list = devpriv->rangelist;
+ s->insn_write = pcl726_ao_insn_write;
+
+ ret = comedi_alloc_subdev_readback(s);
+ if (ret)
+ return ret;
+
+ if (board->have_dio) {
+ /* Digital Input subdevice */
+ s = &dev->subdevices[subdev++];
+ s->type = COMEDI_SUBD_DI;
+ s->subdev_flags = SDF_READABLE;
+ s->n_chan = 16;
+ s->maxdata = 1;
+ s->insn_bits = pcl726_di_insn_bits;
+ s->range_table = &range_digital;
+
+ /* Digital Output subdevice */
+ s = &dev->subdevices[subdev++];
+ s->type = COMEDI_SUBD_DO;
+ s->subdev_flags = SDF_WRITABLE;
+ s->n_chan = 16;
+ s->maxdata = 1;
+ s->insn_bits = pcl726_do_insn_bits;
+ s->range_table = &range_digital;
+ }
+
+ if (dev->irq) {
+ /* Digial Input subdevice - Interrupt support */
+ s = &dev->subdevices[subdev++];
+ dev->read_subdev = s;
+ s->type = COMEDI_SUBD_DI;
+ s->subdev_flags = SDF_READABLE | SDF_CMD_READ;
+ s->n_chan = 1;
+ s->maxdata = 1;
+ s->range_table = &range_digital;
+ s->insn_bits = pcl726_intr_insn_bits;
+ s->len_chanlist = 1;
+ s->do_cmdtest = pcl726_intr_cmdtest;
+ s->do_cmd = pcl726_intr_cmd;
+ s->cancel = pcl726_intr_cancel;
+ }
+
+ return 0;
+}
+
+static struct comedi_driver pcl726_driver = {
+ .driver_name = "pcl726",
+ .module = THIS_MODULE,
+ .attach = pcl726_attach,
+ .detach = comedi_legacy_detach,
+ .board_name = &pcl726_boards[0].name,
+ .num_names = ARRAY_SIZE(pcl726_boards),
+ .offset = sizeof(struct pcl726_board),
+};
+module_comedi_driver(pcl726_driver);
+
+MODULE_AUTHOR("Comedi http://www.comedi.org");
+MODULE_DESCRIPTION("Comedi driver for Advantech PCL-726 & compatibles");
+MODULE_LICENSE("GPL");
Code Review / kvmfornfv.git / blobdiff