357 lines
8.4 KiB
C
357 lines
8.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* comedi/drivers/rti800.c
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* Hardware driver for Analog Devices RTI-800/815 board
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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: rti800
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* Description: Analog Devices RTI-800/815
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* Devices: [Analog Devices] RTI-800 (rti800), RTI-815 (rti815)
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* Author: David A. Schleef <ds@schleef.org>
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* Status: unknown
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* Updated: Fri, 05 Sep 2008 14:50:44 +0100
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*
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* Configuration options:
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* [0] - I/O port base address
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* [1] - IRQ (not supported / unused)
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* [2] - A/D mux/reference (number of channels)
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* 0 = differential
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* 1 = pseudodifferential (common)
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* 2 = single-ended
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* [3] - A/D range
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* 0 = [-10,10]
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* 1 = [-5,5]
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* 2 = [0,10]
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* [4] - A/D encoding
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* 0 = two's complement
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* 1 = straight binary
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* [5] - DAC 0 range
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* 0 = [-10,10]
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* 1 = [0,10]
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* [6] - DAC 0 encoding
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* 0 = two's complement
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* 1 = straight binary
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* [7] - DAC 1 range (same as DAC 0)
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* [8] - DAC 1 encoding (same as DAC 0)
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*/
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#include <linux/module.h>
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#include <linux/delay.h>
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#include <linux/interrupt.h>
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#include <linux/comedi/comedidev.h>
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/*
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* Register map
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*/
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#define RTI800_CSR 0x00
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#define RTI800_CSR_BUSY BIT(7)
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#define RTI800_CSR_DONE BIT(6)
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#define RTI800_CSR_OVERRUN BIT(5)
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#define RTI800_CSR_TCR BIT(4)
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#define RTI800_CSR_DMA_ENAB BIT(3)
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#define RTI800_CSR_INTR_TC BIT(2)
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#define RTI800_CSR_INTR_EC BIT(1)
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#define RTI800_CSR_INTR_OVRN BIT(0)
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#define RTI800_MUXGAIN 0x01
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#define RTI800_CONVERT 0x02
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#define RTI800_ADCLO 0x03
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#define RTI800_ADCHI 0x04
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#define RTI800_DAC0LO 0x05
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#define RTI800_DAC0HI 0x06
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#define RTI800_DAC1LO 0x07
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#define RTI800_DAC1HI 0x08
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#define RTI800_CLRFLAGS 0x09
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#define RTI800_DI 0x0a
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#define RTI800_DO 0x0b
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#define RTI800_9513A_DATA 0x0c
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#define RTI800_9513A_CNTRL 0x0d
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#define RTI800_9513A_STATUS 0x0d
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static const struct comedi_lrange range_rti800_ai_10_bipolar = {
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4, {
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BIP_RANGE(10),
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BIP_RANGE(1),
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BIP_RANGE(0.1),
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BIP_RANGE(0.02)
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}
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};
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static const struct comedi_lrange range_rti800_ai_5_bipolar = {
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4, {
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BIP_RANGE(5),
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BIP_RANGE(0.5),
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BIP_RANGE(0.05),
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BIP_RANGE(0.01)
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}
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};
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static const struct comedi_lrange range_rti800_ai_unipolar = {
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4, {
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UNI_RANGE(10),
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UNI_RANGE(1),
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UNI_RANGE(0.1),
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UNI_RANGE(0.02)
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}
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};
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static const struct comedi_lrange *const rti800_ai_ranges[] = {
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&range_rti800_ai_10_bipolar,
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&range_rti800_ai_5_bipolar,
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&range_rti800_ai_unipolar,
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};
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static const struct comedi_lrange *const rti800_ao_ranges[] = {
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&range_bipolar10,
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&range_unipolar10,
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};
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struct rti800_board {
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const char *name;
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int has_ao;
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};
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static const struct rti800_board rti800_boardtypes[] = {
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{
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.name = "rti800",
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}, {
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.name = "rti815",
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.has_ao = 1,
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},
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};
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struct rti800_private {
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bool adc_2comp;
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bool dac_2comp[2];
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const struct comedi_lrange *ao_range_type_list[2];
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unsigned char muxgain_bits;
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};
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static int rti800_ai_eoc(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 long context)
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{
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unsigned char status;
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status = inb(dev->iobase + RTI800_CSR);
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if (status & RTI800_CSR_OVERRUN) {
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outb(0, dev->iobase + RTI800_CLRFLAGS);
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return -EOVERFLOW;
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}
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if (status & RTI800_CSR_DONE)
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return 0;
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return -EBUSY;
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}
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static int rti800_ai_insn_read(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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struct rti800_private *devpriv = dev->private;
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unsigned int chan = CR_CHAN(insn->chanspec);
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unsigned int gain = CR_RANGE(insn->chanspec);
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unsigned char muxgain_bits;
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int ret;
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int i;
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inb(dev->iobase + RTI800_ADCHI);
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outb(0, dev->iobase + RTI800_CLRFLAGS);
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muxgain_bits = chan | (gain << 5);
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if (muxgain_bits != devpriv->muxgain_bits) {
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devpriv->muxgain_bits = muxgain_bits;
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outb(devpriv->muxgain_bits, dev->iobase + RTI800_MUXGAIN);
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/*
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* Without a delay here, the RTI_CSR_OVERRUN bit
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* gets set, and you will have an error.
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*/
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if (insn->n > 0) {
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int delay = (gain == 0) ? 10 :
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(gain == 1) ? 20 :
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(gain == 2) ? 40 : 80;
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udelay(delay);
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}
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}
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for (i = 0; i < insn->n; i++) {
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unsigned int val;
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outb(0, dev->iobase + RTI800_CONVERT);
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ret = comedi_timeout(dev, s, insn, rti800_ai_eoc, 0);
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if (ret)
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return ret;
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val = inb(dev->iobase + RTI800_ADCLO);
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val |= (inb(dev->iobase + RTI800_ADCHI) & 0xf) << 8;
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if (devpriv->adc_2comp)
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val = comedi_offset_munge(s, val);
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data[i] = val;
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}
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return insn->n;
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}
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static int rti800_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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struct rti800_private *devpriv = dev->private;
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unsigned int chan = CR_CHAN(insn->chanspec);
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int reg_lo = chan ? RTI800_DAC1LO : RTI800_DAC0LO;
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int reg_hi = chan ? RTI800_DAC1HI : RTI800_DAC0HI;
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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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if (devpriv->dac_2comp[chan])
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val = comedi_offset_munge(s, val);
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outb(val & 0xff, dev->iobase + reg_lo);
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outb((val >> 8) & 0xff, dev->iobase + reg_hi);
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}
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return insn->n;
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}
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static int rti800_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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data[1] = inb(dev->iobase + RTI800_DI);
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return insn->n;
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}
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static int rti800_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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if (comedi_dio_update_state(s, data)) {
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/* Outputs are inverted... */
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outb(s->state ^ 0xff, dev->iobase + RTI800_DO);
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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 rti800_attach(struct comedi_device *dev, struct comedi_devconfig *it)
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{
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const struct rti800_board *board = dev->board_ptr;
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struct rti800_private *devpriv;
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struct comedi_subdevice *s;
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int ret;
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ret = comedi_request_region(dev, it->options[0], 0x10);
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if (ret)
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return ret;
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outb(0, dev->iobase + RTI800_CSR);
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inb(dev->iobase + RTI800_ADCHI);
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outb(0, dev->iobase + RTI800_CLRFLAGS);
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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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devpriv->adc_2comp = (it->options[4] == 0);
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devpriv->dac_2comp[0] = (it->options[6] == 0);
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devpriv->dac_2comp[1] = (it->options[8] == 0);
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/* invalid, forces the MUXGAIN register to be set when first used */
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devpriv->muxgain_bits = 0xff;
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ret = comedi_alloc_subdevices(dev, 4);
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if (ret)
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return ret;
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s = &dev->subdevices[0];
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/* ai subdevice */
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s->type = COMEDI_SUBD_AI;
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s->subdev_flags = SDF_READABLE | SDF_GROUND;
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s->n_chan = (it->options[2] ? 16 : 8);
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s->insn_read = rti800_ai_insn_read;
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s->maxdata = 0x0fff;
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s->range_table = (it->options[3] < ARRAY_SIZE(rti800_ai_ranges))
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? rti800_ai_ranges[it->options[3]]
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: &range_unknown;
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s = &dev->subdevices[1];
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if (board->has_ao) {
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/* ao subdevice (only on rti815) */
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s->type = COMEDI_SUBD_AO;
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s->subdev_flags = SDF_WRITABLE;
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s->n_chan = 2;
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s->maxdata = 0x0fff;
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s->range_table_list = devpriv->ao_range_type_list;
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devpriv->ao_range_type_list[0] =
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(it->options[5] < ARRAY_SIZE(rti800_ao_ranges))
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? rti800_ao_ranges[it->options[5]]
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: &range_unknown;
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devpriv->ao_range_type_list[1] =
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(it->options[7] < ARRAY_SIZE(rti800_ao_ranges))
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? rti800_ao_ranges[it->options[7]]
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: &range_unknown;
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s->insn_write = rti800_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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} else {
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s->type = COMEDI_SUBD_UNUSED;
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}
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s = &dev->subdevices[2];
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/* di */
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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 = 8;
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s->insn_bits = rti800_di_insn_bits;
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s->maxdata = 1;
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s->range_table = &range_digital;
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s = &dev->subdevices[3];
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/* do */
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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 = 8;
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s->insn_bits = rti800_do_insn_bits;
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s->maxdata = 1;
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s->range_table = &range_digital;
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/*
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* There is also an Am9513 timer on these boards. This subdevice
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* is not currently supported.
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*/
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return 0;
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}
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static struct comedi_driver rti800_driver = {
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.driver_name = "rti800",
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.module = THIS_MODULE,
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.attach = rti800_attach,
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.detach = comedi_legacy_detach,
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.num_names = ARRAY_SIZE(rti800_boardtypes),
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.board_name = &rti800_boardtypes[0].name,
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.offset = sizeof(struct rti800_board),
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};
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module_comedi_driver(rti800_driver);
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MODULE_DESCRIPTION("Comedi: RTI-800 Multifunction Analog/Digital board");
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MODULE_AUTHOR("Comedi https://www.comedi.org");
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MODULE_LICENSE("GPL");
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