--- /dev/null
+/*
+ * comedi/drivers/rti800.c
+ * Hardware driver for Analog Devices RTI-800/815 board
+ *
+ * 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: rti800
+ * Description: Analog Devices RTI-800/815
+ * Devices: [Analog Devices] RTI-800 (rti800), RTI-815 (rti815)
+ * Author: David A. Schleef <ds@schleef.org>
+ * Status: unknown
+ * Updated: Fri, 05 Sep 2008 14:50:44 +0100
+ *
+ * Configuration options:
+ * [0] - I/O port base address
+ * [1] - IRQ (not supported / unused)
+ * [2] - A/D mux/reference (number of channels)
+ * 0 = differential
+ * 1 = pseudodifferential (common)
+ * 2 = single-ended
+ * [3] - A/D range
+ * 0 = [-10,10]
+ * 1 = [-5,5]
+ * 2 = [0,10]
+ * [4] - A/D encoding
+ * 0 = two's complement
+ * 1 = straight binary
+ * [5] - DAC 0 range
+ * 0 = [-10,10]
+ * 1 = [0,10]
+ * [6] - DAC 0 encoding
+ * 0 = two's complement
+ * 1 = straight binary
+ * [7] - DAC 1 range (same as DAC 0)
+ * [8] - DAC 1 encoding (same as DAC 0)
+ */
+
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include "../comedidev.h"
+
+/*
+ * Register map
+ */
+#define RTI800_CSR 0x00
+#define RTI800_CSR_BUSY (1 << 7)
+#define RTI800_CSR_DONE (1 << 6)
+#define RTI800_CSR_OVERRUN (1 << 5)
+#define RTI800_CSR_TCR (1 << 4)
+#define RTI800_CSR_DMA_ENAB (1 << 3)
+#define RTI800_CSR_INTR_TC (1 << 2)
+#define RTI800_CSR_INTR_EC (1 << 1)
+#define RTI800_CSR_INTR_OVRN (1 << 0)
+#define RTI800_MUXGAIN 0x01
+#define RTI800_CONVERT 0x02
+#define RTI800_ADCLO 0x03
+#define RTI800_ADCHI 0x04
+#define RTI800_DAC0LO 0x05
+#define RTI800_DAC0HI 0x06
+#define RTI800_DAC1LO 0x07
+#define RTI800_DAC1HI 0x08
+#define RTI800_CLRFLAGS 0x09
+#define RTI800_DI 0x0a
+#define RTI800_DO 0x0b
+#define RTI800_9513A_DATA 0x0c
+#define RTI800_9513A_CNTRL 0x0d
+#define RTI800_9513A_STATUS 0x0d
+
+static const struct comedi_lrange range_rti800_ai_10_bipolar = {
+ 4, {
+ BIP_RANGE(10),
+ BIP_RANGE(1),
+ BIP_RANGE(0.1),
+ BIP_RANGE(0.02)
+ }
+};
+
+static const struct comedi_lrange range_rti800_ai_5_bipolar = {
+ 4, {
+ BIP_RANGE(5),
+ BIP_RANGE(0.5),
+ BIP_RANGE(0.05),
+ BIP_RANGE(0.01)
+ }
+};
+
+static const struct comedi_lrange range_rti800_ai_unipolar = {
+ 4, {
+ UNI_RANGE(10),
+ UNI_RANGE(1),
+ UNI_RANGE(0.1),
+ UNI_RANGE(0.02)
+ }
+};
+
+static const struct comedi_lrange *const rti800_ai_ranges[] = {
+ &range_rti800_ai_10_bipolar,
+ &range_rti800_ai_5_bipolar,
+ &range_rti800_ai_unipolar,
+};
+
+static const struct comedi_lrange *const rti800_ao_ranges[] = {
+ &range_bipolar10,
+ &range_unipolar10,
+};
+
+struct rti800_board {
+ const char *name;
+ int has_ao;
+};
+
+static const struct rti800_board rti800_boardtypes[] = {
+ {
+ .name = "rti800",
+ }, {
+ .name = "rti815",
+ .has_ao = 1,
+ },
+};
+
+struct rti800_private {
+ bool adc_2comp;
+ bool dac_2comp[2];
+ const struct comedi_lrange *ao_range_type_list[2];
+ unsigned char muxgain_bits;
+};
+
+static int rti800_ai_eoc(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned long context)
+{
+ unsigned char status;
+
+ status = inb(dev->iobase + RTI800_CSR);
+ if (status & RTI800_CSR_OVERRUN) {
+ outb(0, dev->iobase + RTI800_CLRFLAGS);
+ return -EOVERFLOW;
+ }
+ if (status & RTI800_CSR_DONE)
+ return 0;
+ return -EBUSY;
+}
+
+static int rti800_ai_insn_read(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned int *data)
+{
+ struct rti800_private *devpriv = dev->private;
+ unsigned int chan = CR_CHAN(insn->chanspec);
+ unsigned int gain = CR_RANGE(insn->chanspec);
+ unsigned char muxgain_bits;
+ int ret;
+ int i;
+
+ inb(dev->iobase + RTI800_ADCHI);
+ outb(0, dev->iobase + RTI800_CLRFLAGS);
+
+ muxgain_bits = chan | (gain << 5);
+ if (muxgain_bits != devpriv->muxgain_bits) {
+ devpriv->muxgain_bits = muxgain_bits;
+ outb(devpriv->muxgain_bits, dev->iobase + RTI800_MUXGAIN);
+ /*
+ * Without a delay here, the RTI_CSR_OVERRUN bit
+ * gets set, and you will have an error.
+ */
+ if (insn->n > 0) {
+ int delay = (gain == 0) ? 10 :
+ (gain == 1) ? 20 :
+ (gain == 2) ? 40 : 80;
+
+ udelay(delay);
+ }
+ }
+
+ for (i = 0; i < insn->n; i++) {
+ outb(0, dev->iobase + RTI800_CONVERT);
+
+ ret = comedi_timeout(dev, s, insn, rti800_ai_eoc, 0);
+ if (ret)
+ return ret;
+
+ data[i] = inb(dev->iobase + RTI800_ADCLO);
+ data[i] |= (inb(dev->iobase + RTI800_ADCHI) & 0xf) << 8;
+
+ if (devpriv->adc_2comp)
+ data[i] ^= 0x800;
+ }
+
+ return insn->n;
+}
+
+static int rti800_ao_insn_write(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned int *data)
+{
+ struct rti800_private *devpriv = dev->private;
+ unsigned int chan = CR_CHAN(insn->chanspec);
+ int reg_lo = chan ? RTI800_DAC1LO : RTI800_DAC0LO;
+ int reg_hi = chan ? RTI800_DAC1HI : RTI800_DAC0HI;
+ int i;
+
+ for (i = 0; i < insn->n; i++) {
+ unsigned int val = data[i];
+
+ s->readback[chan] = val;
+
+ if (devpriv->dac_2comp[chan])
+ val ^= 0x800;
+
+ outb(val & 0xff, dev->iobase + reg_lo);
+ outb((val >> 8) & 0xff, dev->iobase + reg_hi);
+ }
+
+ return insn->n;
+}
+
+static int rti800_di_insn_bits(struct comedi_device *dev,
+ struct comedi_subdevice *s,
+ struct comedi_insn *insn,
+ unsigned int *data)
+{
+ data[1] = inb(dev->iobase + RTI800_DI);
+ return insn->n;
+}
+
+static int rti800_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)) {
+ /* Outputs are inverted... */
+ outb(s->state ^ 0xff, dev->iobase + RTI800_DO);
+ }
+
+ data[1] = s->state;
+
+ return insn->n;
+}
+
+static int rti800_attach(struct comedi_device *dev, struct comedi_devconfig *it)
+{
+ const struct rti800_board *board = dev->board_ptr;
+ struct rti800_private *devpriv;
+ struct comedi_subdevice *s;
+ int ret;
+
+ ret = comedi_request_region(dev, it->options[0], 0x10);
+ if (ret)
+ return ret;
+
+ outb(0, dev->iobase + RTI800_CSR);
+ inb(dev->iobase + RTI800_ADCHI);
+ outb(0, dev->iobase + RTI800_CLRFLAGS);
+
+ devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
+ if (!devpriv)
+ return -ENOMEM;
+
+ devpriv->adc_2comp = (it->options[4] == 0);
+ devpriv->dac_2comp[0] = (it->options[6] == 0);
+ devpriv->dac_2comp[1] = (it->options[8] == 0);
+ /* invalid, forces the MUXGAIN register to be set when first used */
+ devpriv->muxgain_bits = 0xff;
+
+ ret = comedi_alloc_subdevices(dev, 4);
+ 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 = (it->options[2] ? 16 : 8);
+ s->insn_read = rti800_ai_insn_read;
+ s->maxdata = 0x0fff;
+ s->range_table = (it->options[3] < ARRAY_SIZE(rti800_ai_ranges))
+ ? rti800_ai_ranges[it->options[3]]
+ : &range_unknown;
+
+ s = &dev->subdevices[1];
+ if (board->has_ao) {
+ /* ao subdevice (only on rti815) */
+ s->type = COMEDI_SUBD_AO;
+ s->subdev_flags = SDF_WRITABLE;
+ s->n_chan = 2;
+ s->maxdata = 0x0fff;
+ s->range_table_list = devpriv->ao_range_type_list;
+ devpriv->ao_range_type_list[0] =
+ (it->options[5] < ARRAY_SIZE(rti800_ao_ranges))
+ ? rti800_ao_ranges[it->options[5]]
+ : &range_unknown;
+ devpriv->ao_range_type_list[1] =
+ (it->options[7] < ARRAY_SIZE(rti800_ao_ranges))
+ ? rti800_ao_ranges[it->options[7]]
+ : &range_unknown;
+ s->insn_write = rti800_ao_insn_write;
+
+ ret = comedi_alloc_subdev_readback(s);
+ if (ret)
+ return ret;
+ } else {
+ s->type = COMEDI_SUBD_UNUSED;
+ }
+
+ s = &dev->subdevices[2];
+ /* di */
+ s->type = COMEDI_SUBD_DI;
+ s->subdev_flags = SDF_READABLE;
+ s->n_chan = 8;
+ s->insn_bits = rti800_di_insn_bits;
+ s->maxdata = 1;
+ s->range_table = &range_digital;
+
+ s = &dev->subdevices[3];
+ /* do */
+ s->type = COMEDI_SUBD_DO;
+ s->subdev_flags = SDF_WRITABLE;
+ s->n_chan = 8;
+ s->insn_bits = rti800_do_insn_bits;
+ s->maxdata = 1;
+ s->range_table = &range_digital;
+
+ /*
+ * There is also an Am9513 timer on these boards. This subdevice
+ * is not currently supported.
+ */
+
+ return 0;
+}
+
+static struct comedi_driver rti800_driver = {
+ .driver_name = "rti800",
+ .module = THIS_MODULE,
+ .attach = rti800_attach,
+ .detach = comedi_legacy_detach,
+ .num_names = ARRAY_SIZE(rti800_boardtypes),
+ .board_name = &rti800_boardtypes[0].name,
+ .offset = sizeof(struct rti800_board),
+};
+module_comedi_driver(rti800_driver);
+
+MODULE_DESCRIPTION("Comedi: RTI-800 Multifunction Analog/Digital board");
+MODULE_AUTHOR("Comedi http://www.comedi.org");
+MODULE_LICENSE("GPL");
Code Review / kvmfornfv.git / blobdiff