--- /dev/null
+/*
+ comedi/drivers/multiq3.c
+ Hardware driver for Quanser Consulting MultiQ-3 board
+
+ COMEDI - Linux Control and Measurement Device Interface
+ Copyright (C) 1999 Anders Blomdell <anders.blomdell@control.lth.se>
+
+ 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: multiq3
+Description: Quanser Consulting MultiQ-3
+Author: Anders Blomdell <anders.blomdell@control.lth.se>
+Status: works
+Devices: [Quanser Consulting] MultiQ-3 (multiq3)
+
+*/
+
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include "../comedidev.h"
+
+/*
+ * MULTIQ-3 port offsets
+ */
+#define MULTIQ3_DIGIN_PORT 0
+#define MULTIQ3_DIGOUT_PORT 0
+#define MULTIQ3_DAC_DATA 2
+#define MULTIQ3_AD_DATA 4
+#define MULTIQ3_AD_CS 4
+#define MULTIQ3_STATUS 6
+#define MULTIQ3_CONTROL 6
+#define MULTIQ3_CLK_DATA 8
+#define MULTIQ3_ENC_DATA 12
+#define MULTIQ3_ENC_CONTROL 14
+
+/*
+ * flags for CONTROL register
+ */
+#define MULTIQ3_AD_MUX_EN 0x0040
+#define MULTIQ3_AD_AUTOZ 0x0080
+#define MULTIQ3_AD_AUTOCAL 0x0100
+#define MULTIQ3_AD_SH 0x0200
+#define MULTIQ3_AD_CLOCK_4M 0x0400
+#define MULTIQ3_DA_LOAD 0x1800
+
+#define MULTIQ3_CONTROL_MUST 0x0600
+
+/*
+ * flags for STATUS register
+ */
+#define MULTIQ3_STATUS_EOC 0x008
+#define MULTIQ3_STATUS_EOC_I 0x010
+
+/*
+ * flags for encoder control
+ */
+#define MULTIQ3_CLOCK_DATA 0x00
+#define MULTIQ3_CLOCK_SETUP 0x18
+#define MULTIQ3_INPUT_SETUP 0x41
+#define MULTIQ3_QUAD_X4 0x38
+#define MULTIQ3_BP_RESET 0x01
+#define MULTIQ3_CNTR_RESET 0x02
+#define MULTIQ3_TRSFRPR_CTR 0x08
+#define MULTIQ3_TRSFRCNTR_OL 0x10
+#define MULTIQ3_EFLAG_RESET 0x06
+
+#define MULTIQ3_TIMEOUT 30
+
+static int multiq3_ai_status(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned long context)
+{
+ unsigned int status;
+
+ status = inw(dev->iobase + MULTIQ3_STATUS);
+ if (status & context)
+ return 0;
+ return -EBUSY;
+}
+
+static int multiq3_ai_insn_read(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn, unsigned int *data)
+{
+ int n;
+ int chan;
+ unsigned int hi, lo;
+ int ret;
+
+ chan = CR_CHAN(insn->chanspec);
+ outw(MULTIQ3_CONTROL_MUST | MULTIQ3_AD_MUX_EN | (chan << 3),
+ dev->iobase + MULTIQ3_CONTROL);
+
+ ret = comedi_timeout(dev, s, insn, multiq3_ai_status,
+ MULTIQ3_STATUS_EOC);
+ if (ret)
+ return ret;
+
+ for (n = 0; n < insn->n; n++) {
+ outw(0, dev->iobase + MULTIQ3_AD_CS);
+
+ ret = comedi_timeout(dev, s, insn, multiq3_ai_status,
+ MULTIQ3_STATUS_EOC_I);
+ if (ret)
+ return ret;
+
+ hi = inb(dev->iobase + MULTIQ3_AD_CS);
+ lo = inb(dev->iobase + MULTIQ3_AD_CS);
+ data[n] = (((hi << 8) | lo) + 0x1000) & 0x1fff;
+ }
+
+ return n;
+}
+
+static int multiq3_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 val = s->readback[chan];
+ int i;
+
+ for (i = 0; i < insn->n; i++) {
+ val = data[i];
+ outw(MULTIQ3_CONTROL_MUST | MULTIQ3_DA_LOAD | chan,
+ dev->iobase + MULTIQ3_CONTROL);
+ outw(val, dev->iobase + MULTIQ3_DAC_DATA);
+ outw(MULTIQ3_CONTROL_MUST, dev->iobase + MULTIQ3_CONTROL);
+ }
+ s->readback[chan] = val;
+
+ return insn->n;
+}
+
+static int multiq3_di_insn_bits(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn, unsigned int *data)
+{
+ data[1] = inw(dev->iobase + MULTIQ3_DIGIN_PORT);
+
+ return insn->n;
+}
+
+static int multiq3_do_insn_bits(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned int *data)
+{
+ if (comedi_dio_update_state(s, data))
+ outw(s->state, dev->iobase + MULTIQ3_DIGOUT_PORT);
+
+ data[1] = s->state;
+
+ return insn->n;
+}
+
+static int multiq3_encoder_insn_read(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned int *data)
+{
+ int chan = CR_CHAN(insn->chanspec);
+ int control = MULTIQ3_CONTROL_MUST | MULTIQ3_AD_MUX_EN | (chan << 3);
+ int value;
+ int n;
+
+ for (n = 0; n < insn->n; n++) {
+ outw(control, dev->iobase + MULTIQ3_CONTROL);
+ outb(MULTIQ3_BP_RESET, dev->iobase + MULTIQ3_ENC_CONTROL);
+ outb(MULTIQ3_TRSFRCNTR_OL, dev->iobase + MULTIQ3_ENC_CONTROL);
+ value = inb(dev->iobase + MULTIQ3_ENC_DATA);
+ value |= (inb(dev->iobase + MULTIQ3_ENC_DATA) << 8);
+ value |= (inb(dev->iobase + MULTIQ3_ENC_DATA) << 16);
+ data[n] = (value + 0x800000) & 0xffffff;
+ }
+
+ return n;
+}
+
+static void encoder_reset(struct comedi_device *dev)
+{
+ struct comedi_subdevice *s = &dev->subdevices[4];
+ int chan;
+
+ for (chan = 0; chan < s->n_chan; chan++) {
+ int control =
+ MULTIQ3_CONTROL_MUST | MULTIQ3_AD_MUX_EN | (chan << 3);
+ outw(control, dev->iobase + MULTIQ3_CONTROL);
+ outb(MULTIQ3_EFLAG_RESET, dev->iobase + MULTIQ3_ENC_CONTROL);
+ outb(MULTIQ3_BP_RESET, dev->iobase + MULTIQ3_ENC_CONTROL);
+ outb(MULTIQ3_CLOCK_DATA, dev->iobase + MULTIQ3_ENC_DATA);
+ outb(MULTIQ3_CLOCK_SETUP, dev->iobase + MULTIQ3_ENC_CONTROL);
+ outb(MULTIQ3_INPUT_SETUP, dev->iobase + MULTIQ3_ENC_CONTROL);
+ outb(MULTIQ3_QUAD_X4, dev->iobase + MULTIQ3_ENC_CONTROL);
+ outb(MULTIQ3_CNTR_RESET, dev->iobase + MULTIQ3_ENC_CONTROL);
+ }
+}
+
+static int multiq3_attach(struct comedi_device *dev,
+ struct comedi_devconfig *it)
+{
+ struct comedi_subdevice *s;
+ int ret;
+
+ ret = comedi_request_region(dev, it->options[0], 0x10);
+ if (ret)
+ return ret;
+
+ ret = comedi_alloc_subdevices(dev, 5);
+ if (ret)
+ return ret;
+
+ s = &dev->subdevices[0];
+ /* ai subdevice */
+ s->type = COMEDI_SUBD_AI;
+ s->subdev_flags = SDF_READABLE | SDF_GROUND;
+ s->n_chan = 8;
+ s->insn_read = multiq3_ai_insn_read;
+ s->maxdata = 0x1fff;
+ s->range_table = &range_bipolar5;
+
+ s = &dev->subdevices[1];
+ /* ao subdevice */
+ s->type = COMEDI_SUBD_AO;
+ s->subdev_flags = SDF_WRITABLE;
+ s->n_chan = 8;
+ s->maxdata = 0xfff;
+ s->range_table = &range_bipolar5;
+ s->insn_write = multiq3_ao_insn_write;
+
+ ret = comedi_alloc_subdev_readback(s);
+ if (ret)
+ return ret;
+
+ s = &dev->subdevices[2];
+ /* di subdevice */
+ s->type = COMEDI_SUBD_DI;
+ s->subdev_flags = SDF_READABLE;
+ s->n_chan = 16;
+ s->insn_bits = multiq3_di_insn_bits;
+ s->maxdata = 1;
+ s->range_table = &range_digital;
+
+ s = &dev->subdevices[3];
+ /* do subdevice */
+ s->type = COMEDI_SUBD_DO;
+ s->subdev_flags = SDF_WRITABLE;
+ s->n_chan = 16;
+ s->insn_bits = multiq3_do_insn_bits;
+ s->maxdata = 1;
+ s->range_table = &range_digital;
+ s->state = 0;
+
+ s = &dev->subdevices[4];
+ /* encoder (counter) subdevice */
+ s->type = COMEDI_SUBD_COUNTER;
+ s->subdev_flags = SDF_READABLE | SDF_LSAMPL;
+ s->n_chan = it->options[2] * 2;
+ s->insn_read = multiq3_encoder_insn_read;
+ s->maxdata = 0xffffff;
+ s->range_table = &range_unknown;
+
+ encoder_reset(dev);
+
+ return 0;
+}
+
+static struct comedi_driver multiq3_driver = {
+ .driver_name = "multiq3",
+ .module = THIS_MODULE,
+ .attach = multiq3_attach,
+ .detach = comedi_legacy_detach,
+};
+module_comedi_driver(multiq3_driver);
+
+MODULE_AUTHOR("Comedi http://www.comedi.org");
+MODULE_DESCRIPTION("Comedi low-level driver");
+MODULE_LICENSE("GPL");
Code Review / kvmfornfv.git / blobdiff