1100 lines
30 KiB
C
1100 lines
30 KiB
C
/*
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comedi/drivers/dmm32at.c
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Diamond Systems mm32at code for a Comedi driver
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COMEDI - Linux Control and Measurement Device Interface
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Copyright (C) 2000 David A. Schleef <ds@schleef.org>
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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: dmm32at
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Description: Diamond Systems mm32at driver.
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Devices:
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Author: Perry J. Piplani <perry.j.piplani@nasa.gov>
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Updated: Fri Jun 4 09:13:24 CDT 2004
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Status: experimental
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This driver is for the Diamond Systems MM-32-AT board
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http://www.diamondsystems.com/products/diamondmm32at It is being used
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on serveral projects inside NASA, without problems so far. For analog
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input commands, TRIG_EXT is not yet supported at all..
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Configuration Options:
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comedi_config /dev/comedi0 dmm32at baseaddr,irq
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*/
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/*
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* The previous block comment is used to automatically generate
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* documentation in Comedi and Comedilib. The fields:
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*
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* Driver: the name of the driver
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* Description: a short phrase describing the driver. Don't list boards.
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* Devices: a full list of the boards that attempt to be supported by
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* the driver. Format is "(manufacturer) board name [comedi name]",
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* where comedi_name is the name that is used to configure the board.
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* See the comment near board_name: in the struct comedi_driver structure
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* below. If (manufacturer) or [comedi name] is missing, the previous
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* value is used.
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* Author: you
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* Updated: date when the _documentation_ was last updated. Use 'date -R'
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* to get a value for this.
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* Status: a one-word description of the status. Valid values are:
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* works - driver works correctly on most boards supported, and
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* passes comedi_test.
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* unknown - unknown. Usually put there by ds.
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* experimental - may not work in any particular release. Author
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* probably wants assistance testing it.
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* bitrotten - driver has not been update in a long time, probably
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* doesn't work, and probably is missing support for significant
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* Comedi interface features.
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* untested - author probably wrote it "blind", and is believed to
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* work, but no confirmation.
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*
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* These headers should be followed by a blank line, and any comments
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* you wish to say about the driver. The comment area is the place
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* to put any known bugs, limitations, unsupported features, supported
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* command triggers, whether or not commands are supported on particular
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* subdevices, etc.
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*
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* Somewhere in the comment should be information about configuration
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* options that are used with comedi_config.
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*/
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#include <linux/interrupt.h>
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#include "../comedidev.h"
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#include <linux/ioport.h>
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/* Board register addresses */
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#define DMM32AT_MEMSIZE 0x10
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#define DMM32AT_CONV 0x00
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#define DMM32AT_AILSB 0x00
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#define DMM32AT_AUXDOUT 0x01
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#define DMM32AT_AIMSB 0x01
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#define DMM32AT_AILOW 0x02
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#define DMM32AT_AIHIGH 0x03
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#define DMM32AT_DACLSB 0x04
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#define DMM32AT_DACSTAT 0x04
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#define DMM32AT_DACMSB 0x05
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#define DMM32AT_FIFOCNTRL 0x07
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#define DMM32AT_FIFOSTAT 0x07
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#define DMM32AT_CNTRL 0x08
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#define DMM32AT_AISTAT 0x08
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#define DMM32AT_INTCLOCK 0x09
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#define DMM32AT_CNTRDIO 0x0a
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#define DMM32AT_AICONF 0x0b
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#define DMM32AT_AIRBACK 0x0b
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#define DMM32AT_CLK1 0x0d
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#define DMM32AT_CLK2 0x0e
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#define DMM32AT_CLKCT 0x0f
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#define DMM32AT_DIOA 0x0c
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#define DMM32AT_DIOB 0x0d
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#define DMM32AT_DIOC 0x0e
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#define DMM32AT_DIOCONF 0x0f
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#define dmm_inb(cdev, reg) inb((cdev->iobase)+reg)
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#define dmm_outb(cdev, reg, valu) outb(valu, (cdev->iobase)+reg)
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/* Board register values. */
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/* DMM32AT_DACSTAT 0x04 */
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#define DMM32AT_DACBUSY 0x80
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/* DMM32AT_FIFOCNTRL 0x07 */
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#define DMM32AT_FIFORESET 0x02
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#define DMM32AT_SCANENABLE 0x04
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/* DMM32AT_CNTRL 0x08 */
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#define DMM32AT_RESET 0x20
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#define DMM32AT_INTRESET 0x08
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#define DMM32AT_CLKACC 0x00
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#define DMM32AT_DIOACC 0x01
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/* DMM32AT_AISTAT 0x08 */
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#define DMM32AT_STATUS 0x80
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/* DMM32AT_INTCLOCK 0x09 */
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#define DMM32AT_ADINT 0x80
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#define DMM32AT_CLKSEL 0x03
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/* DMM32AT_CNTRDIO 0x0a */
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#define DMM32AT_FREQ12 0x80
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/* DMM32AT_AICONF 0x0b */
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#define DMM32AT_RANGE_U10 0x0c
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#define DMM32AT_RANGE_U5 0x0d
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#define DMM32AT_RANGE_B10 0x08
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#define DMM32AT_RANGE_B5 0x00
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#define DMM32AT_SCINT_20 0x00
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#define DMM32AT_SCINT_15 0x10
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#define DMM32AT_SCINT_10 0x20
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#define DMM32AT_SCINT_5 0x30
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/* DMM32AT_CLKCT 0x0f */
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#define DMM32AT_CLKCT1 0x56 /* mode3 counter 1 - write low byte only */
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#define DMM32AT_CLKCT2 0xb6 /* mode3 counter 2 - write high and low byte */
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/* DMM32AT_DIOCONF 0x0f */
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#define DMM32AT_DIENABLE 0x80
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#define DMM32AT_DIRA 0x10
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#define DMM32AT_DIRB 0x02
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#define DMM32AT_DIRCL 0x01
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#define DMM32AT_DIRCH 0x08
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/* board AI ranges in comedi structure */
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static const struct comedi_lrange dmm32at_airanges = {
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4,
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{
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UNI_RANGE(10),
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UNI_RANGE(5),
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BIP_RANGE(10),
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BIP_RANGE(5),
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}
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};
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/* register values for above ranges */
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static const unsigned char dmm32at_rangebits[] = {
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DMM32AT_RANGE_U10,
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DMM32AT_RANGE_U5,
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DMM32AT_RANGE_B10,
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DMM32AT_RANGE_B5,
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};
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/* only one of these ranges is valid, as set by a jumper on the
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* board. The application should only use the range set by the jumper
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*/
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static const struct comedi_lrange dmm32at_aoranges = {
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4,
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{
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UNI_RANGE(10),
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UNI_RANGE(5),
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BIP_RANGE(10),
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BIP_RANGE(5),
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}
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};
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/*
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* Board descriptions for two imaginary boards. Describing the
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* boards in this way is optional, and completely driver-dependent.
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* Some drivers use arrays such as this, other do not.
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*/
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struct dmm32at_board {
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const char *name;
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int ai_chans;
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int ai_bits;
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const struct comedi_lrange *ai_ranges;
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int ao_chans;
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int ao_bits;
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const struct comedi_lrange *ao_ranges;
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int have_dio;
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int dio_chans;
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};
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static const struct dmm32at_board dmm32at_boards[] = {
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{
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.name = "dmm32at",
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.ai_chans = 32,
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.ai_bits = 16,
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.ai_ranges = &dmm32at_airanges,
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.ao_chans = 4,
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.ao_bits = 12,
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.ao_ranges = &dmm32at_aoranges,
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.have_dio = 1,
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.dio_chans = 24,
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},
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};
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/*
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* Useful for shorthand access to the particular board structure
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*/
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#define thisboard ((const struct dmm32at_board *)dev->board_ptr)
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/* this structure is for data unique to this hardware driver. If
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* several hardware drivers keep similar information in this structure,
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* feel free to suggest moving the variable to the struct comedi_device struct.
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*/
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struct dmm32at_private {
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int data;
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int ai_inuse;
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unsigned int ai_scans_left;
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/* Used for AO readback */
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unsigned int ao_readback[4];
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unsigned char dio_config;
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};
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/*
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* most drivers define the following macro to make it easy to
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* access the private structure.
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*/
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#define devpriv ((struct dmm32at_private *)dev->private)
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/*
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* The struct comedi_driver structure tells the Comedi core module
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* which functions to call to configure/deconfigure (attach/detach)
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* the board, and also about the kernel module that contains
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* the device code.
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*/
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static int dmm32at_attach(struct comedi_device *dev,
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struct comedi_devconfig *it);
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static int dmm32at_detach(struct comedi_device *dev);
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static struct comedi_driver driver_dmm32at = {
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.driver_name = "dmm32at",
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.module = THIS_MODULE,
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.attach = dmm32at_attach,
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.detach = dmm32at_detach,
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/* It is not necessary to implement the following members if you are
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* writing a driver for a ISA PnP or PCI card */
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/* Most drivers will support multiple types of boards by
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* having an array of board structures. These were defined
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* in dmm32at_boards[] above. Note that the element 'name'
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* was first in the structure -- Comedi uses this fact to
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* extract the name of the board without knowing any details
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* about the structure except for its length.
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* When a device is attached (by comedi_config), the name
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* of the device is given to Comedi, and Comedi tries to
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* match it by going through the list of board names. If
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* there is a match, the address of the pointer is put
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* into dev->board_ptr and driver->attach() is called.
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*
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* Note that these are not necessary if you can determine
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* the type of board in software. ISA PnP, PCI, and PCMCIA
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* devices are such boards.
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*/
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.board_name = &dmm32at_boards[0].name,
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.offset = sizeof(struct dmm32at_board),
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.num_names = ARRAY_SIZE(dmm32at_boards),
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};
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/* prototypes for driver functions below */
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static int dmm32at_ai_rinsn(struct comedi_device *dev,
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struct comedi_subdevice *s,
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struct comedi_insn *insn, unsigned int *data);
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static int dmm32at_ao_winsn(struct comedi_device *dev,
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struct comedi_subdevice *s,
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struct comedi_insn *insn, unsigned int *data);
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static int dmm32at_ao_rinsn(struct comedi_device *dev,
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struct comedi_subdevice *s,
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struct comedi_insn *insn, unsigned int *data);
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static int dmm32at_dio_insn_bits(struct comedi_device *dev,
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struct comedi_subdevice *s,
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struct comedi_insn *insn, unsigned int *data);
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static int dmm32at_dio_insn_config(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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static int dmm32at_ai_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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static int dmm32at_ai_cmd(struct comedi_device *dev,
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struct comedi_subdevice *s);
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static int dmm32at_ai_cancel(struct comedi_device *dev,
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struct comedi_subdevice *s);
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static int dmm32at_ns_to_timer(unsigned int *ns, int round);
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static irqreturn_t dmm32at_isr(int irq, void *d);
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void dmm32at_setaitimer(struct comedi_device *dev, unsigned int nansec);
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/*
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* Attach is called by the Comedi core to configure the driver
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* for a particular board. If you specified a board_name array
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* in the driver structure, dev->board_ptr contains that
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* address.
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*/
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static int dmm32at_attach(struct comedi_device *dev,
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struct comedi_devconfig *it)
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{
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int ret;
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struct comedi_subdevice *s;
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unsigned char aihi, ailo, fifostat, aistat, intstat, airback;
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unsigned long iobase;
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unsigned int irq;
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iobase = it->options[0];
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irq = it->options[1];
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printk("comedi%d: dmm32at: attaching\n", dev->minor);
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printk("dmm32at: probing at address 0x%04lx, irq %u\n", iobase, irq);
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/* register address space */
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if (!request_region(iobase, DMM32AT_MEMSIZE, thisboard->name)) {
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printk("I/O port conflict\n");
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return -EIO;
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}
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dev->iobase = iobase;
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/* the following just makes sure the board is there and gets
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it to a known state */
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/* reset the board */
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dmm_outb(dev, DMM32AT_CNTRL, DMM32AT_RESET);
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/* allow a millisecond to reset */
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udelay(1000);
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/* zero scan and fifo control */
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dmm_outb(dev, DMM32AT_FIFOCNTRL, 0x0);
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/* zero interrupt and clock control */
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dmm_outb(dev, DMM32AT_INTCLOCK, 0x0);
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/* write a test channel range, the high 3 bits should drop */
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dmm_outb(dev, DMM32AT_AILOW, 0x80);
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dmm_outb(dev, DMM32AT_AIHIGH, 0xff);
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/* set the range at 10v unipolar */
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dmm_outb(dev, DMM32AT_AICONF, DMM32AT_RANGE_U10);
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/* should take 10 us to settle, here's a hundred */
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udelay(100);
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/* read back the values */
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ailo = dmm_inb(dev, DMM32AT_AILOW);
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aihi = dmm_inb(dev, DMM32AT_AIHIGH);
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fifostat = dmm_inb(dev, DMM32AT_FIFOSTAT);
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aistat = dmm_inb(dev, DMM32AT_AISTAT);
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intstat = dmm_inb(dev, DMM32AT_INTCLOCK);
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airback = dmm_inb(dev, DMM32AT_AIRBACK);
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printk("dmm32at: lo=0x%02x hi=0x%02x fifostat=0x%02x\n",
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ailo, aihi, fifostat);
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printk("dmm32at: aistat=0x%02x intstat=0x%02x airback=0x%02x\n",
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aistat, intstat, airback);
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if ((ailo != 0x00) || (aihi != 0x1f) || (fifostat != 0x80) ||
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(aistat != 0x60 || (intstat != 0x00) || airback != 0x0c)) {
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printk("dmmat32: board detection failed\n");
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return -EIO;
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}
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/* board is there, register interrupt */
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if (irq) {
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ret = request_irq(irq, dmm32at_isr, 0, thisboard->name, dev);
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if (ret < 0) {
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printk("irq conflict\n");
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return ret;
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}
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dev->irq = irq;
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}
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/*
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* If you can probe the device to determine what device in a series
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* it is, this is the place to do it. Otherwise, dev->board_ptr
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* should already be initialized.
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*/
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/* dev->board_ptr = dmm32at_probe(dev); */
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/*
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* Initialize dev->board_name. Note that we can use the "thisboard"
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* macro now, since we just initialized it in the last line.
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*/
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dev->board_name = thisboard->name;
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/*
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* Allocate the private structure area. alloc_private() is a
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* convenient macro defined in comedidev.h.
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*/
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if (alloc_private(dev, sizeof(struct dmm32at_private)) < 0)
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return -ENOMEM;
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/*
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* Allocate the subdevice structures. alloc_subdevice() is a
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* convenient macro defined in comedidev.h.
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*/
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if (alloc_subdevices(dev, 3) < 0)
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return -ENOMEM;
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s = dev->subdevices + 0;
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dev->read_subdev = s;
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/* analog input subdevice */
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s->type = COMEDI_SUBD_AI;
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/* we support single-ended (ground) and differential */
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s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_DIFF | SDF_CMD_READ;
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s->n_chan = thisboard->ai_chans;
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s->maxdata = (1 << thisboard->ai_bits) - 1;
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s->range_table = thisboard->ai_ranges;
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s->len_chanlist = 32; /* This is the maximum chanlist length that
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the board can handle */
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s->insn_read = dmm32at_ai_rinsn;
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s->do_cmd = dmm32at_ai_cmd;
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s->do_cmdtest = dmm32at_ai_cmdtest;
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s->cancel = dmm32at_ai_cancel;
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s = dev->subdevices + 1;
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/* analog output 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 = thisboard->ao_chans;
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s->maxdata = (1 << thisboard->ao_bits) - 1;
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s->range_table = thisboard->ao_ranges;
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s->insn_write = dmm32at_ao_winsn;
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s->insn_read = dmm32at_ao_rinsn;
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s = dev->subdevices + 2;
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/* digital i/o subdevice */
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if (thisboard->have_dio) {
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/* get access to the DIO regs */
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dmm_outb(dev, DMM32AT_CNTRL, DMM32AT_DIOACC);
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/* set the DIO's to the defualt input setting */
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devpriv->dio_config = DMM32AT_DIRA | DMM32AT_DIRB |
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DMM32AT_DIRCL | DMM32AT_DIRCH | DMM32AT_DIENABLE;
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dmm_outb(dev, DMM32AT_DIOCONF, devpriv->dio_config);
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/* set up the subdevice */
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s->type = COMEDI_SUBD_DIO;
|
|
s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
|
|
s->n_chan = thisboard->dio_chans;
|
|
s->maxdata = 1;
|
|
s->state = 0;
|
|
s->range_table = &range_digital;
|
|
s->insn_bits = dmm32at_dio_insn_bits;
|
|
s->insn_config = dmm32at_dio_insn_config;
|
|
} else {
|
|
s->type = COMEDI_SUBD_UNUSED;
|
|
}
|
|
|
|
/* success */
|
|
printk("comedi%d: dmm32at: attached\n", dev->minor);
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
/*
|
|
* _detach is called to deconfigure a device. It should deallocate
|
|
* resources.
|
|
* This function is also called when _attach() fails, so it should be
|
|
* careful not to release resources that were not necessarily
|
|
* allocated by _attach(). dev->private and dev->subdevices are
|
|
* deallocated automatically by the core.
|
|
*/
|
|
static int dmm32at_detach(struct comedi_device *dev)
|
|
{
|
|
printk("comedi%d: dmm32at: remove\n", dev->minor);
|
|
if (dev->irq)
|
|
free_irq(dev->irq, dev);
|
|
if (dev->iobase)
|
|
release_region(dev->iobase, DMM32AT_MEMSIZE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* "instructions" read/write data in "one-shot" or "software-triggered"
|
|
* mode.
|
|
*/
|
|
|
|
static int dmm32at_ai_rinsn(struct comedi_device *dev,
|
|
struct comedi_subdevice *s,
|
|
struct comedi_insn *insn, unsigned int *data)
|
|
{
|
|
int n, i;
|
|
unsigned int d;
|
|
unsigned char status;
|
|
unsigned short msb, lsb;
|
|
unsigned char chan;
|
|
int range;
|
|
|
|
/* get the channel and range number */
|
|
|
|
chan = CR_CHAN(insn->chanspec) & (s->n_chan - 1);
|
|
range = CR_RANGE(insn->chanspec);
|
|
|
|
/* printk("channel=0x%02x, range=%d\n",chan,range); */
|
|
|
|
/* zero scan and fifo control and reset fifo */
|
|
dmm_outb(dev, DMM32AT_FIFOCNTRL, DMM32AT_FIFORESET);
|
|
|
|
/* write the ai channel range regs */
|
|
dmm_outb(dev, DMM32AT_AILOW, chan);
|
|
dmm_outb(dev, DMM32AT_AIHIGH, chan);
|
|
/* set the range bits */
|
|
dmm_outb(dev, DMM32AT_AICONF, dmm32at_rangebits[range]);
|
|
|
|
/* wait for circuit to settle */
|
|
for (i = 0; i < 40000; i++) {
|
|
status = dmm_inb(dev, DMM32AT_AIRBACK);
|
|
if ((status & DMM32AT_STATUS) == 0)
|
|
break;
|
|
}
|
|
if (i == 40000) {
|
|
printk("timeout\n");
|
|
return -ETIMEDOUT;
|
|
}
|
|
|
|
/* convert n samples */
|
|
for (n = 0; n < insn->n; n++) {
|
|
/* trigger conversion */
|
|
dmm_outb(dev, DMM32AT_CONV, 0xff);
|
|
/* wait for conversion to end */
|
|
for (i = 0; i < 40000; i++) {
|
|
status = dmm_inb(dev, DMM32AT_AISTAT);
|
|
if ((status & DMM32AT_STATUS) == 0)
|
|
break;
|
|
}
|
|
if (i == 40000) {
|
|
printk("timeout\n");
|
|
return -ETIMEDOUT;
|
|
}
|
|
|
|
/* read data */
|
|
lsb = dmm_inb(dev, DMM32AT_AILSB);
|
|
msb = dmm_inb(dev, DMM32AT_AIMSB);
|
|
|
|
/* invert sign bit to make range unsigned, this is an
|
|
idiosyncracy of the diamond board, it return
|
|
conversions as a signed value, i.e. -32768 to
|
|
32767, flipping the bit and interpreting it as
|
|
signed gives you a range of 0 to 65535 which is
|
|
used by comedi */
|
|
d = ((msb ^ 0x0080) << 8) + lsb;
|
|
|
|
data[n] = d;
|
|
}
|
|
|
|
/* return the number of samples read/written */
|
|
return n;
|
|
}
|
|
|
|
static int dmm32at_ai_cmdtest(struct comedi_device *dev,
|
|
struct comedi_subdevice *s,
|
|
struct comedi_cmd *cmd)
|
|
{
|
|
int err = 0;
|
|
int tmp;
|
|
int start_chan, gain, i;
|
|
|
|
/* printk("dmmat32 in command test\n"); */
|
|
|
|
/* cmdtest tests a particular command to see if it is valid.
|
|
* Using the cmdtest ioctl, a user can create a valid cmd
|
|
* and then have it executes by the cmd ioctl.
|
|
*
|
|
* cmdtest returns 1,2,3,4 or 0, depending on which tests
|
|
* the command passes. */
|
|
|
|
/* step 1: make sure trigger sources are trivially valid */
|
|
|
|
tmp = cmd->start_src;
|
|
cmd->start_src &= TRIG_NOW;
|
|
if (!cmd->start_src || tmp != cmd->start_src)
|
|
err++;
|
|
|
|
tmp = cmd->scan_begin_src;
|
|
cmd->scan_begin_src &= TRIG_TIMER /*| TRIG_EXT */ ;
|
|
if (!cmd->scan_begin_src || tmp != cmd->scan_begin_src)
|
|
err++;
|
|
|
|
tmp = cmd->convert_src;
|
|
cmd->convert_src &= TRIG_TIMER /*| TRIG_EXT */ ;
|
|
if (!cmd->convert_src || tmp != cmd->convert_src)
|
|
err++;
|
|
|
|
tmp = cmd->scan_end_src;
|
|
cmd->scan_end_src &= TRIG_COUNT;
|
|
if (!cmd->scan_end_src || tmp != cmd->scan_end_src)
|
|
err++;
|
|
|
|
tmp = cmd->stop_src;
|
|
cmd->stop_src &= TRIG_COUNT | TRIG_NONE;
|
|
if (!cmd->stop_src || tmp != cmd->stop_src)
|
|
err++;
|
|
|
|
if (err)
|
|
return 1;
|
|
|
|
/* step 2: make sure trigger sources are unique and mutually compatible */
|
|
|
|
/* note that mutual compatiblity is not an issue here */
|
|
if (cmd->scan_begin_src != TRIG_TIMER &&
|
|
cmd->scan_begin_src != TRIG_EXT)
|
|
err++;
|
|
if (cmd->convert_src != TRIG_TIMER && cmd->convert_src != TRIG_EXT)
|
|
err++;
|
|
if (cmd->stop_src != TRIG_COUNT && cmd->stop_src != TRIG_NONE)
|
|
err++;
|
|
|
|
if (err)
|
|
return 2;
|
|
|
|
/* step 3: make sure arguments are trivially compatible */
|
|
|
|
if (cmd->start_arg != 0) {
|
|
cmd->start_arg = 0;
|
|
err++;
|
|
}
|
|
#define MAX_SCAN_SPEED 1000000 /* in nanoseconds */
|
|
#define MIN_SCAN_SPEED 1000000000 /* in nanoseconds */
|
|
|
|
if (cmd->scan_begin_src == TRIG_TIMER) {
|
|
if (cmd->scan_begin_arg < MAX_SCAN_SPEED) {
|
|
cmd->scan_begin_arg = MAX_SCAN_SPEED;
|
|
err++;
|
|
}
|
|
if (cmd->scan_begin_arg > MIN_SCAN_SPEED) {
|
|
cmd->scan_begin_arg = MIN_SCAN_SPEED;
|
|
err++;
|
|
}
|
|
} else {
|
|
/* external trigger */
|
|
/* should be level/edge, hi/lo specification here */
|
|
/* should specify multiple external triggers */
|
|
if (cmd->scan_begin_arg > 9) {
|
|
cmd->scan_begin_arg = 9;
|
|
err++;
|
|
}
|
|
}
|
|
if (cmd->convert_src == TRIG_TIMER) {
|
|
if (cmd->convert_arg >= 17500)
|
|
cmd->convert_arg = 20000;
|
|
else if (cmd->convert_arg >= 12500)
|
|
cmd->convert_arg = 15000;
|
|
else if (cmd->convert_arg >= 7500)
|
|
cmd->convert_arg = 10000;
|
|
else
|
|
cmd->convert_arg = 5000;
|
|
|
|
} else {
|
|
/* external trigger */
|
|
/* see above */
|
|
if (cmd->convert_arg > 9) {
|
|
cmd->convert_arg = 9;
|
|
err++;
|
|
}
|
|
}
|
|
|
|
if (cmd->scan_end_arg != cmd->chanlist_len) {
|
|
cmd->scan_end_arg = cmd->chanlist_len;
|
|
err++;
|
|
}
|
|
if (cmd->stop_src == TRIG_COUNT) {
|
|
if (cmd->stop_arg > 0xfffffff0) {
|
|
cmd->stop_arg = 0xfffffff0;
|
|
err++;
|
|
}
|
|
if (cmd->stop_arg == 0) {
|
|
cmd->stop_arg = 1;
|
|
err++;
|
|
}
|
|
} else {
|
|
/* TRIG_NONE */
|
|
if (cmd->stop_arg != 0) {
|
|
cmd->stop_arg = 0;
|
|
err++;
|
|
}
|
|
}
|
|
|
|
if (err)
|
|
return 3;
|
|
|
|
/* step 4: fix up any arguments */
|
|
|
|
if (cmd->scan_begin_src == TRIG_TIMER) {
|
|
tmp = cmd->scan_begin_arg;
|
|
dmm32at_ns_to_timer(&cmd->scan_begin_arg,
|
|
cmd->flags & TRIG_ROUND_MASK);
|
|
if (tmp != cmd->scan_begin_arg)
|
|
err++;
|
|
}
|
|
if (cmd->convert_src == TRIG_TIMER) {
|
|
tmp = cmd->convert_arg;
|
|
dmm32at_ns_to_timer(&cmd->convert_arg,
|
|
cmd->flags & TRIG_ROUND_MASK);
|
|
if (tmp != cmd->convert_arg)
|
|
err++;
|
|
if (cmd->scan_begin_src == TRIG_TIMER &&
|
|
cmd->scan_begin_arg <
|
|
cmd->convert_arg * cmd->scan_end_arg) {
|
|
cmd->scan_begin_arg =
|
|
cmd->convert_arg * cmd->scan_end_arg;
|
|
err++;
|
|
}
|
|
}
|
|
|
|
if (err)
|
|
return 4;
|
|
|
|
/* step 5 check the channel list, the channel list for this
|
|
board must be consecutive and gains must be the same */
|
|
|
|
if (cmd->chanlist) {
|
|
gain = CR_RANGE(cmd->chanlist[0]);
|
|
start_chan = CR_CHAN(cmd->chanlist[0]);
|
|
for (i = 1; i < cmd->chanlist_len; i++) {
|
|
if (CR_CHAN(cmd->chanlist[i]) !=
|
|
(start_chan + i) % s->n_chan) {
|
|
comedi_error(dev,
|
|
"entries in chanlist must be consecutive channels, counting upwards\n");
|
|
err++;
|
|
}
|
|
if (CR_RANGE(cmd->chanlist[i]) != gain) {
|
|
comedi_error(dev,
|
|
"entries in chanlist must all have the same gain\n");
|
|
err++;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (err)
|
|
return 5;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dmm32at_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
|
|
{
|
|
struct comedi_cmd *cmd = &s->async->cmd;
|
|
int i, range;
|
|
unsigned char chanlo, chanhi, status;
|
|
|
|
if (!cmd->chanlist)
|
|
return -EINVAL;
|
|
|
|
/* get the channel list and range */
|
|
chanlo = CR_CHAN(cmd->chanlist[0]) & (s->n_chan - 1);
|
|
chanhi = chanlo + cmd->chanlist_len - 1;
|
|
if (chanhi >= s->n_chan)
|
|
return -EINVAL;
|
|
range = CR_RANGE(cmd->chanlist[0]);
|
|
|
|
/* reset fifo */
|
|
dmm_outb(dev, DMM32AT_FIFOCNTRL, DMM32AT_FIFORESET);
|
|
|
|
/* set scan enable */
|
|
dmm_outb(dev, DMM32AT_FIFOCNTRL, DMM32AT_SCANENABLE);
|
|
|
|
/* write the ai channel range regs */
|
|
dmm_outb(dev, DMM32AT_AILOW, chanlo);
|
|
dmm_outb(dev, DMM32AT_AIHIGH, chanhi);
|
|
|
|
/* set the range bits */
|
|
dmm_outb(dev, DMM32AT_AICONF, dmm32at_rangebits[range]);
|
|
|
|
/* reset the interrupt just in case */
|
|
dmm_outb(dev, DMM32AT_CNTRL, DMM32AT_INTRESET);
|
|
|
|
if (cmd->stop_src == TRIG_COUNT)
|
|
devpriv->ai_scans_left = cmd->stop_arg;
|
|
else { /* TRIG_NONE */
|
|
devpriv->ai_scans_left = 0xffffffff; /* indicates TRIG_NONE to isr */
|
|
}
|
|
|
|
/* wait for circuit to settle */
|
|
for (i = 0; i < 40000; i++) {
|
|
status = dmm_inb(dev, DMM32AT_AIRBACK);
|
|
if ((status & DMM32AT_STATUS) == 0)
|
|
break;
|
|
}
|
|
if (i == 40000) {
|
|
printk("timeout\n");
|
|
return -ETIMEDOUT;
|
|
}
|
|
|
|
if (devpriv->ai_scans_left > 1) {
|
|
/* start the clock and enable the interrupts */
|
|
dmm32at_setaitimer(dev, cmd->scan_begin_arg);
|
|
} else {
|
|
/* start the interrups and initiate a single scan */
|
|
dmm_outb(dev, DMM32AT_INTCLOCK, DMM32AT_ADINT);
|
|
dmm_outb(dev, DMM32AT_CONV, 0xff);
|
|
}
|
|
|
|
/* printk("dmmat32 in command\n"); */
|
|
|
|
/* for(i=0;i<cmd->chanlist_len;i++) */
|
|
/* comedi_buf_put(s->async,i*100); */
|
|
|
|
/* s->async->events |= COMEDI_CB_EOA; */
|
|
/* comedi_event(dev, s); */
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
static int dmm32at_ai_cancel(struct comedi_device *dev,
|
|
struct comedi_subdevice *s)
|
|
{
|
|
devpriv->ai_scans_left = 1;
|
|
return 0;
|
|
}
|
|
|
|
static irqreturn_t dmm32at_isr(int irq, void *d)
|
|
{
|
|
unsigned char intstat;
|
|
unsigned int samp;
|
|
unsigned short msb, lsb;
|
|
int i;
|
|
struct comedi_device *dev = d;
|
|
|
|
if (!dev->attached) {
|
|
comedi_error(dev, "spurious interrupt");
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
intstat = dmm_inb(dev, DMM32AT_INTCLOCK);
|
|
|
|
if (intstat & DMM32AT_ADINT) {
|
|
struct comedi_subdevice *s = dev->read_subdev;
|
|
struct comedi_cmd *cmd = &s->async->cmd;
|
|
|
|
for (i = 0; i < cmd->chanlist_len; i++) {
|
|
/* read data */
|
|
lsb = dmm_inb(dev, DMM32AT_AILSB);
|
|
msb = dmm_inb(dev, DMM32AT_AIMSB);
|
|
|
|
/* invert sign bit to make range unsigned */
|
|
samp = ((msb ^ 0x0080) << 8) + lsb;
|
|
comedi_buf_put(s->async, samp);
|
|
}
|
|
|
|
if (devpriv->ai_scans_left != 0xffffffff) { /* TRIG_COUNT */
|
|
devpriv->ai_scans_left--;
|
|
if (devpriv->ai_scans_left == 0) {
|
|
/* disable further interrupts and clocks */
|
|
dmm_outb(dev, DMM32AT_INTCLOCK, 0x0);
|
|
/* set the buffer to be flushed with an EOF */
|
|
s->async->events |= COMEDI_CB_EOA;
|
|
}
|
|
|
|
}
|
|
/* flush the buffer */
|
|
comedi_event(dev, s);
|
|
}
|
|
|
|
/* reset the interrupt */
|
|
dmm_outb(dev, DMM32AT_CNTRL, DMM32AT_INTRESET);
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/* This function doesn't require a particular form, this is just
|
|
* what happens to be used in some of the drivers. It should
|
|
* convert ns nanoseconds to a counter value suitable for programming
|
|
* the device. Also, it should adjust ns so that it cooresponds to
|
|
* the actual time that the device will use. */
|
|
static int dmm32at_ns_to_timer(unsigned int *ns, int round)
|
|
{
|
|
/* trivial timer */
|
|
/* if your timing is done through two cascaded timers, the
|
|
* i8253_cascade_ns_to_timer() function in 8253.h can be
|
|
* very helpful. There are also i8254_load() and i8254_mm_load()
|
|
* which can be used to load values into the ubiquitous 8254 counters
|
|
*/
|
|
|
|
return *ns;
|
|
}
|
|
|
|
static int dmm32at_ao_winsn(struct comedi_device *dev,
|
|
struct comedi_subdevice *s,
|
|
struct comedi_insn *insn, unsigned int *data)
|
|
{
|
|
int i;
|
|
int chan = CR_CHAN(insn->chanspec);
|
|
unsigned char hi, lo, status;
|
|
|
|
/* Writing a list of values to an AO channel is probably not
|
|
* very useful, but that's how the interface is defined. */
|
|
for (i = 0; i < insn->n; i++) {
|
|
|
|
devpriv->ao_readback[chan] = data[i];
|
|
|
|
/* get the low byte */
|
|
lo = data[i] & 0x00ff;
|
|
/* high byte also contains channel number */
|
|
hi = (data[i] >> 8) + chan * (1 << 6);
|
|
/* printk("writing 0x%02x 0x%02x\n",hi,lo); */
|
|
/* write the low and high values to the board */
|
|
dmm_outb(dev, DMM32AT_DACLSB, lo);
|
|
dmm_outb(dev, DMM32AT_DACMSB, hi);
|
|
|
|
/* wait for circuit to settle */
|
|
for (i = 0; i < 40000; i++) {
|
|
status = dmm_inb(dev, DMM32AT_DACSTAT);
|
|
if ((status & DMM32AT_DACBUSY) == 0)
|
|
break;
|
|
}
|
|
if (i == 40000) {
|
|
printk("timeout\n");
|
|
return -ETIMEDOUT;
|
|
}
|
|
/* dummy read to update trigger the output */
|
|
status = dmm_inb(dev, DMM32AT_DACMSB);
|
|
|
|
}
|
|
|
|
/* return the number of samples read/written */
|
|
return i;
|
|
}
|
|
|
|
/* AO subdevices should have a read insn as well as a write insn.
|
|
* Usually this means copying a value stored in devpriv. */
|
|
static int dmm32at_ao_rinsn(struct comedi_device *dev,
|
|
struct comedi_subdevice *s,
|
|
struct comedi_insn *insn, unsigned int *data)
|
|
{
|
|
int i;
|
|
int chan = CR_CHAN(insn->chanspec);
|
|
|
|
for (i = 0; i < insn->n; i++)
|
|
data[i] = devpriv->ao_readback[chan];
|
|
|
|
return i;
|
|
}
|
|
|
|
/* DIO devices are slightly special. Although it is possible to
|
|
* implement the insn_read/insn_write interface, it is much more
|
|
* useful to applications if you implement the insn_bits interface.
|
|
* This allows packed reading/writing of the DIO channels. The
|
|
* comedi core can convert between insn_bits and insn_read/write */
|
|
static int dmm32at_dio_insn_bits(struct comedi_device *dev,
|
|
struct comedi_subdevice *s,
|
|
struct comedi_insn *insn, unsigned int *data)
|
|
{
|
|
unsigned char diobits;
|
|
|
|
if (insn->n != 2)
|
|
return -EINVAL;
|
|
|
|
/* The insn data is a mask in data[0] and the new data
|
|
* in data[1], each channel cooresponding to a bit. */
|
|
if (data[0]) {
|
|
s->state &= ~data[0];
|
|
s->state |= data[0] & data[1];
|
|
/* Write out the new digital output lines */
|
|
/* outw(s->state,dev->iobase + DMM32AT_DIO); */
|
|
}
|
|
|
|
/* get access to the DIO regs */
|
|
dmm_outb(dev, DMM32AT_CNTRL, DMM32AT_DIOACC);
|
|
|
|
/* if either part of dio is set for output */
|
|
if (((devpriv->dio_config & DMM32AT_DIRCL) == 0) ||
|
|
((devpriv->dio_config & DMM32AT_DIRCH) == 0)) {
|
|
diobits = (s->state & 0x00ff0000) >> 16;
|
|
dmm_outb(dev, DMM32AT_DIOC, diobits);
|
|
}
|
|
if ((devpriv->dio_config & DMM32AT_DIRB) == 0) {
|
|
diobits = (s->state & 0x0000ff00) >> 8;
|
|
dmm_outb(dev, DMM32AT_DIOB, diobits);
|
|
}
|
|
if ((devpriv->dio_config & DMM32AT_DIRA) == 0) {
|
|
diobits = (s->state & 0x000000ff);
|
|
dmm_outb(dev, DMM32AT_DIOA, diobits);
|
|
}
|
|
|
|
/* now read the state back in */
|
|
s->state = dmm_inb(dev, DMM32AT_DIOC);
|
|
s->state <<= 8;
|
|
s->state |= dmm_inb(dev, DMM32AT_DIOB);
|
|
s->state <<= 8;
|
|
s->state |= dmm_inb(dev, DMM32AT_DIOA);
|
|
data[1] = s->state;
|
|
|
|
/* on return, data[1] contains the value of the digital
|
|
* input and output lines. */
|
|
/* data[1]=inw(dev->iobase + DMM32AT_DIO); */
|
|
/* or we could just return the software copy of the output values if
|
|
* it was a purely digital output subdevice */
|
|
/* data[1]=s->state; */
|
|
|
|
return 2;
|
|
}
|
|
|
|
static int dmm32at_dio_insn_config(struct comedi_device *dev,
|
|
struct comedi_subdevice *s,
|
|
struct comedi_insn *insn, unsigned int *data)
|
|
{
|
|
unsigned char chanbit;
|
|
int chan = CR_CHAN(insn->chanspec);
|
|
|
|
if (insn->n != 1)
|
|
return -EINVAL;
|
|
|
|
if (chan < 8)
|
|
chanbit = DMM32AT_DIRA;
|
|
else if (chan < 16)
|
|
chanbit = DMM32AT_DIRB;
|
|
else if (chan < 20)
|
|
chanbit = DMM32AT_DIRCL;
|
|
else
|
|
chanbit = DMM32AT_DIRCH;
|
|
|
|
/* The input or output configuration of each digital line is
|
|
* configured by a special insn_config instruction. chanspec
|
|
* contains the channel to be changed, and data[0] contains the
|
|
* value COMEDI_INPUT or COMEDI_OUTPUT. */
|
|
|
|
/* if output clear the bit, otherwise set it */
|
|
if (data[0] == COMEDI_OUTPUT) {
|
|
devpriv->dio_config &= ~chanbit;
|
|
} else {
|
|
devpriv->dio_config |= chanbit;
|
|
}
|
|
/* get access to the DIO regs */
|
|
dmm_outb(dev, DMM32AT_CNTRL, DMM32AT_DIOACC);
|
|
/* set the DIO's to the new configuration setting */
|
|
dmm_outb(dev, DMM32AT_DIOCONF, devpriv->dio_config);
|
|
|
|
return 1;
|
|
}
|
|
|
|
void dmm32at_setaitimer(struct comedi_device *dev, unsigned int nansec)
|
|
{
|
|
unsigned char lo1, lo2, hi2;
|
|
unsigned short both2;
|
|
|
|
/* based on 10mhz clock */
|
|
lo1 = 200;
|
|
both2 = nansec / 20000;
|
|
hi2 = (both2 & 0xff00) >> 8;
|
|
lo2 = both2 & 0x00ff;
|
|
|
|
/* set the counter frequency to 10mhz */
|
|
dmm_outb(dev, DMM32AT_CNTRDIO, 0);
|
|
|
|
/* get access to the clock regs */
|
|
dmm_outb(dev, DMM32AT_CNTRL, DMM32AT_CLKACC);
|
|
|
|
/* write the counter 1 control word and low byte to counter */
|
|
dmm_outb(dev, DMM32AT_CLKCT, DMM32AT_CLKCT1);
|
|
dmm_outb(dev, DMM32AT_CLK1, lo1);
|
|
|
|
/* write the counter 2 control word and low byte then to counter */
|
|
dmm_outb(dev, DMM32AT_CLKCT, DMM32AT_CLKCT2);
|
|
dmm_outb(dev, DMM32AT_CLK2, lo2);
|
|
dmm_outb(dev, DMM32AT_CLK2, hi2);
|
|
|
|
/* enable the ai conversion interrupt and the clock to start scans */
|
|
dmm_outb(dev, DMM32AT_INTCLOCK, DMM32AT_ADINT | DMM32AT_CLKSEL);
|
|
|
|
}
|
|
|
|
/*
|
|
* A convenient macro that defines init_module() and cleanup_module(),
|
|
* as necessary.
|
|
*/
|
|
COMEDI_INITCLEANUP(driver_dmm32at);
|