// SPDX-License-Identifier: GPL-2.0+
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/*
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* pcl726.c
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* Comedi driver for 6/12-Channel D/A Output and DIO cards
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*
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* COMEDI - Linux Control and Measurement Device Interface
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* Copyright (C) 1998 David A. Schleef <ds@schleef.org>
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*/
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/*
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* Driver: pcl726
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* Description: Advantech PCL-726 & compatibles
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* Author: David A. Schleef <ds@schleef.org>
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* Status: untested
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* Devices: [Advantech] PCL-726 (pcl726), PCL-727 (pcl727), PCL-728 (pcl728),
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* [ADLink] ACL-6126 (acl6126), ACL-6128 (acl6128)
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*
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* Configuration Options:
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* [0] - IO Base
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* [1] - IRQ (ACL-6126 only)
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* [2] - D/A output range for channel 0
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* [3] - D/A output range for channel 1
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*
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* Boards with > 2 analog output channels:
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* [4] - D/A output range for channel 2
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* [5] - D/A output range for channel 3
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* [6] - D/A output range for channel 4
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* [7] - D/A output range for channel 5
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*
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* Boards with > 6 analog output channels:
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* [8] - D/A output range for channel 6
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* [9] - D/A output range for channel 7
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* [10] - D/A output range for channel 8
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* [11] - D/A output range for channel 9
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* [12] - D/A output range for channel 10
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* [13] - D/A output range for channel 11
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*
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* For PCL-726 the D/A output ranges are:
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* 0: 0-5V, 1: 0-10V, 2: +/-5V, 3: +/-10V, 4: 4-20mA, 5: unknown
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*
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* For PCL-727:
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* 0: 0-5V, 1: 0-10V, 2: +/-5V, 3: 4-20mA
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*
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* For PCL-728 and ACL-6128:
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* 0: 0-5V, 1: 0-10V, 2: +/-5V, 3: +/-10V, 4: 4-20mA, 5: 0-20mA
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*
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* For ACL-6126:
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* 0: 0-5V, 1: 0-10V, 2: +/-5V, 3: +/-10V, 4: 4-20mA
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*/
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#include <linux/module.h>
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#include <linux/interrupt.h>
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#include "../comedidev.h"
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#define PCL726_AO_MSB_REG(x) (0x00 + ((x) * 2))
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#define PCL726_AO_LSB_REG(x) (0x01 + ((x) * 2))
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#define PCL726_DO_MSB_REG 0x0c
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#define PCL726_DO_LSB_REG 0x0d
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#define PCL726_DI_MSB_REG 0x0e
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#define PCL726_DI_LSB_REG 0x0f
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#define PCL727_DI_MSB_REG 0x00
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#define PCL727_DI_LSB_REG 0x01
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#define PCL727_DO_MSB_REG 0x18
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#define PCL727_DO_LSB_REG 0x19
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static const struct comedi_lrange *const rangelist_726[] = {
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&range_unipolar5,
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&range_unipolar10,
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&range_bipolar5,
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&range_bipolar10,
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&range_4_20mA,
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&range_unknown
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};
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static const struct comedi_lrange *const rangelist_727[] = {
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&range_unipolar5,
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&range_unipolar10,
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&range_bipolar5,
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&range_4_20mA
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};
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static const struct comedi_lrange *const rangelist_728[] = {
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&range_unipolar5,
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&range_unipolar10,
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&range_bipolar5,
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&range_bipolar10,
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&range_4_20mA,
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&range_0_20mA
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};
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struct pcl726_board {
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const char *name;
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unsigned long io_len;
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unsigned int irq_mask;
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const struct comedi_lrange *const *ao_ranges;
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int ao_num_ranges;
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int ao_nchan;
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unsigned int have_dio:1;
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unsigned int is_pcl727:1;
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};
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static const struct pcl726_board pcl726_boards[] = {
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{
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.name = "pcl726",
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.io_len = 0x10,
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.ao_ranges = &rangelist_726[0],
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.ao_num_ranges = ARRAY_SIZE(rangelist_726),
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.ao_nchan = 6,
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.have_dio = 1,
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}, {
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.name = "pcl727",
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.io_len = 0x20,
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.ao_ranges = &rangelist_727[0],
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.ao_num_ranges = ARRAY_SIZE(rangelist_727),
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.ao_nchan = 12,
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.have_dio = 1,
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.is_pcl727 = 1,
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}, {
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.name = "pcl728",
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.io_len = 0x08,
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.ao_num_ranges = ARRAY_SIZE(rangelist_728),
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.ao_ranges = &rangelist_728[0],
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.ao_nchan = 2,
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}, {
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.name = "acl6126",
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.io_len = 0x10,
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.irq_mask = 0x96e8,
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.ao_num_ranges = ARRAY_SIZE(rangelist_726),
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.ao_ranges = &rangelist_726[0],
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.ao_nchan = 6,
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.have_dio = 1,
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}, {
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.name = "acl6128",
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.io_len = 0x08,
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.ao_num_ranges = ARRAY_SIZE(rangelist_728),
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.ao_ranges = &rangelist_728[0],
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.ao_nchan = 2,
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},
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};
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struct pcl726_private {
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const struct comedi_lrange *rangelist[12];
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unsigned int cmd_running:1;
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};
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static int pcl726_intr_insn_bits(struct comedi_device *dev,
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struct comedi_subdevice *s,
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struct comedi_insn *insn,
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unsigned int *data)
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{
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data[1] = 0;
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return insn->n;
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}
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static int pcl726_intr_cmdtest(struct comedi_device *dev,
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struct comedi_subdevice *s,
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struct comedi_cmd *cmd)
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{
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int err = 0;
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/* Step 1 : check if triggers are trivially valid */
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err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW);
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err |= comedi_check_trigger_src(&cmd->scan_begin_src, TRIG_EXT);
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err |= comedi_check_trigger_src(&cmd->convert_src, TRIG_FOLLOW);
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err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
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err |= comedi_check_trigger_src(&cmd->stop_src, TRIG_NONE);
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if (err)
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return 1;
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/* Step 2a : make sure trigger sources are unique */
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/* Step 2b : and mutually compatible */
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/* Step 3: check if arguments are trivially valid */
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err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0);
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err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
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err |= comedi_check_trigger_arg_is(&cmd->convert_arg, 0);
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err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg,
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cmd->chanlist_len);
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err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0);
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if (err)
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return 3;
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/* Step 4: fix up any arguments */
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/* Step 5: check channel list if it exists */
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return 0;
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}
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static int pcl726_intr_cmd(struct comedi_device *dev,
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struct comedi_subdevice *s)
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{
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struct pcl726_private *devpriv = dev->private;
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devpriv->cmd_running = 1;
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return 0;
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}
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static int pcl726_intr_cancel(struct comedi_device *dev,
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struct comedi_subdevice *s)
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{
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struct pcl726_private *devpriv = dev->private;
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devpriv->cmd_running = 0;
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return 0;
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}
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static irqreturn_t pcl726_interrupt(int irq, void *d)
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{
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struct comedi_device *dev = d;
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struct comedi_subdevice *s = dev->read_subdev;
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struct pcl726_private *devpriv = dev->private;
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if (devpriv->cmd_running) {
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pcl726_intr_cancel(dev, s);
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comedi_buf_write_samples(s, &s->state, 1);
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comedi_handle_events(dev, s);
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}
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return IRQ_HANDLED;
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}
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static int pcl726_ao_insn_write(struct comedi_device *dev,
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struct comedi_subdevice *s,
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struct comedi_insn *insn,
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unsigned int *data)
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{
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unsigned int chan = CR_CHAN(insn->chanspec);
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unsigned int range = CR_RANGE(insn->chanspec);
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int i;
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for (i = 0; i < insn->n; i++) {
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unsigned int val = data[i];
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s->readback[chan] = val;
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/* bipolar data to the DAC is two's complement */
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if (comedi_chan_range_is_bipolar(s, chan, range))
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val = comedi_offset_munge(s, val);
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/* order is important, MSB then LSB */
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outb((val >> 8) & 0xff, dev->iobase + PCL726_AO_MSB_REG(chan));
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outb(val & 0xff, dev->iobase + PCL726_AO_LSB_REG(chan));
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}
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return insn->n;
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}
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static int pcl726_di_insn_bits(struct comedi_device *dev,
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struct comedi_subdevice *s,
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struct comedi_insn *insn,
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unsigned int *data)
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{
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const struct pcl726_board *board = dev->board_ptr;
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unsigned int val;
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if (board->is_pcl727) {
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val = inb(dev->iobase + PCL727_DI_LSB_REG);
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val |= (inb(dev->iobase + PCL727_DI_MSB_REG) << 8);
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} else {
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val = inb(dev->iobase + PCL726_DI_LSB_REG);
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val |= (inb(dev->iobase + PCL726_DI_MSB_REG) << 8);
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}
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data[1] = val;
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return insn->n;
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}
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static int pcl726_do_insn_bits(struct comedi_device *dev,
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struct comedi_subdevice *s,
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struct comedi_insn *insn,
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unsigned int *data)
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{
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const struct pcl726_board *board = dev->board_ptr;
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unsigned long io = dev->iobase;
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unsigned int mask;
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mask = comedi_dio_update_state(s, data);
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if (mask) {
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if (board->is_pcl727) {
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if (mask & 0x00ff)
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outb(s->state & 0xff, io + PCL727_DO_LSB_REG);
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if (mask & 0xff00)
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outb((s->state >> 8), io + PCL727_DO_MSB_REG);
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} else {
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if (mask & 0x00ff)
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outb(s->state & 0xff, io + PCL726_DO_LSB_REG);
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if (mask & 0xff00)
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outb((s->state >> 8), io + PCL726_DO_MSB_REG);
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}
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}
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data[1] = s->state;
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return insn->n;
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}
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static int pcl726_attach(struct comedi_device *dev,
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struct comedi_devconfig *it)
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{
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const struct pcl726_board *board = dev->board_ptr;
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struct pcl726_private *devpriv;
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struct comedi_subdevice *s;
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int subdev;
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int ret;
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int i;
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ret = comedi_request_region(dev, it->options[0], board->io_len);
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if (ret)
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return ret;
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devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
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if (!devpriv)
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return -ENOMEM;
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/*
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* Hook up the external trigger source interrupt only if the
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* user config option is valid and the board supports interrupts.
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*/
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if (it->options[1] && (board->irq_mask & (1 << it->options[1]))) {
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ret = request_irq(it->options[1], pcl726_interrupt, 0,
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dev->board_name, dev);
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if (ret == 0) {
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/* External trigger source is from Pin-17 of CN3 */
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dev->irq = it->options[1];
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}
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}
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/* setup the per-channel analog output range_table_list */
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for (i = 0; i < 12; i++) {
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unsigned int opt = it->options[2 + i];
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if (opt < board->ao_num_ranges && i < board->ao_nchan)
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devpriv->rangelist[i] = board->ao_ranges[opt];
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else
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devpriv->rangelist[i] = &range_unknown;
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}
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subdev = board->have_dio ? 3 : 1;
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if (dev->irq)
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subdev++;
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ret = comedi_alloc_subdevices(dev, subdev);
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if (ret)
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return ret;
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subdev = 0;
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/* Analog Output subdevice */
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s = &dev->subdevices[subdev++];
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s->type = COMEDI_SUBD_AO;
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s->subdev_flags = SDF_WRITABLE | SDF_GROUND;
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s->n_chan = board->ao_nchan;
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s->maxdata = 0x0fff;
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s->range_table_list = devpriv->rangelist;
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s->insn_write = pcl726_ao_insn_write;
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ret = comedi_alloc_subdev_readback(s);
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if (ret)
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return ret;
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if (board->have_dio) {
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/* Digital Input subdevice */
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s = &dev->subdevices[subdev++];
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s->type = COMEDI_SUBD_DI;
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s->subdev_flags = SDF_READABLE;
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s->n_chan = 16;
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s->maxdata = 1;
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s->insn_bits = pcl726_di_insn_bits;
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s->range_table = &range_digital;
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/* Digital Output subdevice */
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s = &dev->subdevices[subdev++];
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s->type = COMEDI_SUBD_DO;
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s->subdev_flags = SDF_WRITABLE;
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s->n_chan = 16;
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s->maxdata = 1;
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s->insn_bits = pcl726_do_insn_bits;
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s->range_table = &range_digital;
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}
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if (dev->irq) {
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/* Digial Input subdevice - Interrupt support */
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s = &dev->subdevices[subdev++];
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dev->read_subdev = s;
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s->type = COMEDI_SUBD_DI;
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s->subdev_flags = SDF_READABLE | SDF_CMD_READ;
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s->n_chan = 1;
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s->maxdata = 1;
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s->range_table = &range_digital;
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s->insn_bits = pcl726_intr_insn_bits;
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s->len_chanlist = 1;
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s->do_cmdtest = pcl726_intr_cmdtest;
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s->do_cmd = pcl726_intr_cmd;
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s->cancel = pcl726_intr_cancel;
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}
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return 0;
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}
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static struct comedi_driver pcl726_driver = {
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.driver_name = "pcl726",
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.module = THIS_MODULE,
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.attach = pcl726_attach,
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.detach = comedi_legacy_detach,
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.board_name = &pcl726_boards[0].name,
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.num_names = ARRAY_SIZE(pcl726_boards),
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.offset = sizeof(struct pcl726_board),
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};
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module_comedi_driver(pcl726_driver);
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MODULE_AUTHOR("Comedi http://www.comedi.org");
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MODULE_DESCRIPTION("Comedi driver for Advantech PCL-726 & compatibles");
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MODULE_LICENSE("GPL");
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