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Staging: comedi: add multiq3 driver
Hardware driver for Quanser Consulting MultiQ-3 board From: Anders Blomdell <anders.blomdell@control.lth.se> Cc: David Schleef <ds@schleef.org> Cc: Frank Mori Hess <fmhess@users.sourceforge.net> Cc: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Anders Blomdell
Greg Kroah-Hartman
parent
ac52af96de
commit
77e01cdbad
333
drivers/staging/comedi/drivers/multiq3.c
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333
drivers/staging/comedi/drivers/multiq3.c
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/*
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comedi/drivers/multiq3.c
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Hardware driver for Quanser Consulting MultiQ-3 board
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COMEDI - Linux Control and Measurement Device Interface
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Copyright (C) 1999 Anders Blomdell <anders.blomdell@control.lth.se>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/*
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Driver: multiq3
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Description: Quanser Consulting MultiQ-3
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Author: Anders Blomdell <anders.blomdell@control.lth.se>
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Status: works
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Devices: [Quanser Consulting] MultiQ-3 (multiq3)
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*/
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#include "../comedidev.h"
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#include <linux/ioport.h>
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#define MULTIQ3_SIZE 16
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/*
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* MULTIQ-3 port offsets
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*/
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#define MULTIQ3_DIGIN_PORT 0
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#define MULTIQ3_DIGOUT_PORT 0
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#define MULTIQ3_DAC_DATA 2
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#define MULTIQ3_AD_DATA 4
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#define MULTIQ3_AD_CS 4
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#define MULTIQ3_STATUS 6
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#define MULTIQ3_CONTROL 6
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#define MULTIQ3_CLK_DATA 8
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#define MULTIQ3_ENC_DATA 12
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#define MULTIQ3_ENC_CONTROL 14
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/*
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* flags for CONTROL register
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*/
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#define MULTIQ3_AD_MUX_EN 0x0040
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#define MULTIQ3_AD_AUTOZ 0x0080
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#define MULTIQ3_AD_AUTOCAL 0x0100
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#define MULTIQ3_AD_SH 0x0200
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#define MULTIQ3_AD_CLOCK_4M 0x0400
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#define MULTIQ3_DA_LOAD 0x1800
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#define MULTIQ3_CONTROL_MUST 0x0600
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/*
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* flags for STATUS register
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*/
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#define MULTIQ3_STATUS_EOC 0x008
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#define MULTIQ3_STATUS_EOC_I 0x010
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/*
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* flags for encoder control
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*/
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#define MULTIQ3_CLOCK_DATA 0x00
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#define MULTIQ3_CLOCK_SETUP 0x18
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#define MULTIQ3_INPUT_SETUP 0x41
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#define MULTIQ3_QUAD_X4 0x38
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#define MULTIQ3_BP_RESET 0x01
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#define MULTIQ3_CNTR_RESET 0x02
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#define MULTIQ3_TRSFRPR_CTR 0x08
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#define MULTIQ3_TRSFRCNTR_OL 0x10
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#define MULTIQ3_EFLAG_RESET 0x06
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#define MULTIQ3_TIMEOUT 30
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static int multiq3_attach(comedi_device * dev, comedi_devconfig * it);
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static int multiq3_detach(comedi_device * dev);
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static comedi_driver driver_multiq3 = {
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driver_name:"multiq3",
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module:THIS_MODULE,
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attach:multiq3_attach,
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detach:multiq3_detach,
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};
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COMEDI_INITCLEANUP(driver_multiq3);
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struct multiq3_private {
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lsampl_t ao_readback[2];
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};
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#define devpriv ((struct multiq3_private *)dev->private)
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static int multiq3_ai_insn_read(comedi_device * dev, comedi_subdevice * s,
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comedi_insn * insn, lsampl_t * data)
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{
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int i, n;
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int chan;
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unsigned int hi, lo;
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chan = CR_CHAN(insn->chanspec);
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outw(MULTIQ3_CONTROL_MUST | MULTIQ3_AD_MUX_EN | (chan << 3),
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dev->iobase + MULTIQ3_CONTROL);
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for (i = 0; i < MULTIQ3_TIMEOUT; i++) {
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if (inw(dev->iobase + MULTIQ3_STATUS) & MULTIQ3_STATUS_EOC)
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break;
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}
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if (i == MULTIQ3_TIMEOUT)
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return -ETIMEDOUT;
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for (n = 0; n < insn->n; n++) {
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outw(0, dev->iobase + MULTIQ3_AD_CS);
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for (i = 0; i < MULTIQ3_TIMEOUT; i++) {
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if (inw(dev->iobase +
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MULTIQ3_STATUS) & MULTIQ3_STATUS_EOC_I)
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break;
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}
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if (i == MULTIQ3_TIMEOUT)
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return -ETIMEDOUT;
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hi = inb(dev->iobase + MULTIQ3_AD_CS);
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lo = inb(dev->iobase + MULTIQ3_AD_CS);
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data[n] = (((hi << 8) | lo) + 0x1000) & 0x1fff;
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}
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return n;
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}
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static int multiq3_ao_insn_read(comedi_device * dev, comedi_subdevice * s,
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comedi_insn * insn, lsampl_t * data)
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{
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int i;
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int chan = CR_CHAN(insn->chanspec);
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for (i = 0; i < insn->n; i++) {
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data[i] = devpriv->ao_readback[chan];
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}
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return i;
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}
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static int multiq3_ao_insn_write(comedi_device * dev, comedi_subdevice * s,
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comedi_insn * insn, lsampl_t * data)
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{
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int i;
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int chan = CR_CHAN(insn->chanspec);
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for (i = 0; i < insn->n; i++) {
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outw(MULTIQ3_CONTROL_MUST | MULTIQ3_DA_LOAD | chan,
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dev->iobase + MULTIQ3_CONTROL);
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outw(data[i], dev->iobase + MULTIQ3_DAC_DATA);
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outw(MULTIQ3_CONTROL_MUST, dev->iobase + MULTIQ3_CONTROL);
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devpriv->ao_readback[chan] = data[i];
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}
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return i;
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}
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static int multiq3_di_insn_bits(comedi_device * dev, comedi_subdevice * s,
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comedi_insn * insn, lsampl_t * data)
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{
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if (insn->n != 2)
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return -EINVAL;
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data[1] = inw(dev->iobase + MULTIQ3_DIGIN_PORT);
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return 2;
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}
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static int multiq3_do_insn_bits(comedi_device * dev, comedi_subdevice * s,
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comedi_insn * insn, lsampl_t * data)
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{
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if (insn->n != 2)
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return -EINVAL;
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s->state &= ~data[0];
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s->state |= (data[0] & data[1]);
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outw(s->state, dev->iobase + MULTIQ3_DIGOUT_PORT);
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data[1] = s->state;
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return 2;
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}
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static int multiq3_encoder_insn_read(comedi_device * dev, comedi_subdevice * s,
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comedi_insn * insn, lsampl_t * data)
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{
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int n;
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int chan = CR_CHAN(insn->chanspec);
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int control = MULTIQ3_CONTROL_MUST | MULTIQ3_AD_MUX_EN | (chan << 3);
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for (n = 0; n < insn->n; n++) {
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int value;
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outw(control, dev->iobase + MULTIQ3_CONTROL);
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outb(MULTIQ3_BP_RESET, dev->iobase + MULTIQ3_ENC_CONTROL);
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outb(MULTIQ3_TRSFRCNTR_OL, dev->iobase + MULTIQ3_ENC_CONTROL);
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value = inb(dev->iobase + MULTIQ3_ENC_DATA);
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value |= (inb(dev->iobase + MULTIQ3_ENC_DATA) << 8);
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value |= (inb(dev->iobase + MULTIQ3_ENC_DATA) << 16);
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data[n] = (value + 0x800000) & 0xffffff;
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}
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return n;
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}
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static void encoder_reset(comedi_device * dev)
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{
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int chan;
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for (chan = 0; chan < dev->subdevices[4].n_chan; chan++) {
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int control =
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MULTIQ3_CONTROL_MUST | MULTIQ3_AD_MUX_EN | (chan << 3);
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outw(control, dev->iobase + MULTIQ3_CONTROL);
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outb(MULTIQ3_EFLAG_RESET, dev->iobase + MULTIQ3_ENC_CONTROL);
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outb(MULTIQ3_BP_RESET, dev->iobase + MULTIQ3_ENC_CONTROL);
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outb(MULTIQ3_CLOCK_DATA, dev->iobase + MULTIQ3_ENC_DATA);
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outb(MULTIQ3_CLOCK_SETUP, dev->iobase + MULTIQ3_ENC_CONTROL);
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outb(MULTIQ3_INPUT_SETUP, dev->iobase + MULTIQ3_ENC_CONTROL);
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outb(MULTIQ3_QUAD_X4, dev->iobase + MULTIQ3_ENC_CONTROL);
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outb(MULTIQ3_CNTR_RESET, dev->iobase + MULTIQ3_ENC_CONTROL);
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}
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}
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/*
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options[0] - I/O port
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options[1] - irq
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options[2] - number of encoder chips installed
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*/
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static int multiq3_attach(comedi_device * dev, comedi_devconfig * it)
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{
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int result = 0;
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unsigned long iobase;
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unsigned int irq;
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comedi_subdevice *s;
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iobase = it->options[0];
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printk("comedi%d: multiq3: 0x%04lx ", dev->minor, iobase);
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if (!request_region(iobase, MULTIQ3_SIZE, "multiq3")) {
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printk("comedi%d: I/O port conflict\n", dev->minor);
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return -EIO;
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}
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dev->iobase = iobase;
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irq = it->options[1];
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if (irq) {
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printk("comedi%d: irq = %u ignored\n", dev->minor, irq);
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} else {
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printk("comedi%d: no irq\n", dev->minor);
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}
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dev->board_name = "multiq3";
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result = alloc_subdevices(dev, 5);
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if (result < 0)
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return result;
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result = alloc_private(dev, sizeof(struct multiq3_private));
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if (result < 0)
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return result;
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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 = 8;
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s->insn_read = multiq3_ai_insn_read;
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s->maxdata = 0x1fff;
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s->range_table = &range_bipolar5;
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s = dev->subdevices + 1;
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/* ao subdevice */
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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 = 8;
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s->insn_read = multiq3_ao_insn_read;
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s->insn_write = multiq3_ao_insn_write;
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s->maxdata = 0xfff;
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s->range_table = &range_bipolar5;
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s = dev->subdevices + 2;
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/* di subdevice */
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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->insn_bits = multiq3_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 subdevice */
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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->insn_bits = multiq3_do_insn_bits;
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s->maxdata = 1;
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s->range_table = &range_digital;
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s->state = 0;
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s = dev->subdevices + 4;
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/* encoder (counter) subdevice */
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s->type = COMEDI_SUBD_COUNTER;
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s->subdev_flags = SDF_READABLE | SDF_LSAMPL;
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s->n_chan = it->options[2] * 2;
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s->insn_read = multiq3_encoder_insn_read;
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s->maxdata = 0xffffff;
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s->range_table = &range_unknown;
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encoder_reset(dev);
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return 0;
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}
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static int multiq3_detach(comedi_device * dev)
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{
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printk("comedi%d: multiq3: remove\n", dev->minor);
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if (dev->iobase) {
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release_region(dev->iobase, MULTIQ3_SIZE);
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}
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if (dev->irq) {
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free_irq(dev->irq, dev);
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}
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return 0;
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}
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