LXR linux/drivers/staging/comedi/drivers/ni

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * comedi/drivers/ni_labpc.c
   4 * Driver for National Instruments Lab-PC series boards and compatibles
   5 * Copyright (C) 2001-2003 Frank Mori Hess <fmhess@users.sourceforge.net>
   6 */
   7
   8/*
   9 * Driver: ni_labpc
  10 * Description: National Instruments Lab-PC (& compatibles)
  11 * Devices: [National Instruments] Lab-PC-1200 (lab-pc-1200),
  12 *   Lab-PC-1200AI (lab-pc-1200ai), Lab-PC+ (lab-pc+)
  13 * Author: Frank Mori Hess <fmhess@users.sourceforge.net>
  14 * Status: works
  15 *
  16 * Configuration options - ISA boards:
  17 *   [0] - I/O port base address
  18 *   [1] - IRQ (optional, required for timed or externally triggered
  19 *              conversions)
  20 *   [2] - DMA channel (optional)
  21 *
  22 * Tested with lab-pc-1200.  For the older Lab-PC+, not all input
  23 * ranges and analog references will work, the available ranges/arefs
  24 * will depend on how you have configured the jumpers on your board
  25 * (see your owner's manual).
  26 *
  27 * Kernel-level ISA plug-and-play support for the lab-pc-1200 boards
  28 * has not yet been added to the driver, mainly due to the fact that
  29 * I don't know the device id numbers. If you have one of these boards,
  30 * please file a bug report at http://comedi.org/ so I can get the
  31 * necessary information from you.
  32 *
  33 * The 1200 series boards have onboard calibration dacs for correcting
  34 * analog input/output offsets and gains. The proper settings for these
  35 * caldacs are stored on the board's eeprom. To read the caldac values
  36 * from the eeprom and store them into a file that can be then be used
  37 * by comedilib, use the comedi_calibrate program.
  38 *
  39 * The Lab-pc+ has quirky chanlist requirements when scanning multiple
  40 * channels. Multiple channel scan sequence must start at highest channel,
  41 * then decrement down to channel 0. The rest of the cards can scan down
  42 * like lab-pc+ or scan up from channel zero. Chanlists consisting of all
  43 * one channel are also legal, and allow you to pace conversions in bursts.
  44 *
  45 * NI manuals:
  46 * 341309a (labpc-1200 register manual)
  47 * 320502b (lab-pc+)
  48 */
  49
  50#include <linux/module.h>
  51
  52#include "../comedidev.h"
  53
  54#include "ni_labpc.h"
  55#include "ni_labpc_isadma.h"
  56
  57static const struct labpc_boardinfo labpc_boards[] = {
  58        {
  59                .name                   = "lab-pc-1200",
  60                .ai_speed               = 10000,
  61                .ai_scan_up             = 1,
  62                .has_ao                 = 1,
  63                .is_labpc1200           = 1,
  64        }, {
  65                .name                   = "lab-pc-1200ai",
  66                .ai_speed               = 10000,
  67                .ai_scan_up             = 1,
  68                .is_labpc1200           = 1,
  69        }, {
  70                .name                   = "lab-pc+",
  71                .ai_speed               = 12000,
  72                .has_ao                 = 1,
  73        },
  74};
  75
  76static int labpc_attach(struct comedi_device *dev, struct comedi_devconfig *it)
  77{
  78        unsigned int irq = it->options[1];
  79        unsigned int dma_chan = it->options[2];
  80        int ret;
  81
  82        ret = comedi_request_region(dev, it->options[0], 0x20);
  83        if (ret)
  84                return ret;
  85
  86        ret = labpc_common_attach(dev, irq, 0);
  87        if (ret)
  88                return ret;
  89
  90        if (dev->irq)
  91                labpc_init_dma_chan(dev, dma_chan);
  92
  93        return 0;
  94}
  95
  96static void labpc_detach(struct comedi_device *dev)
  97{
  98        labpc_free_dma_chan(dev);
  99        labpc_common_detach(dev);
 100        comedi_legacy_detach(dev);
 101}
 102
 103static struct comedi_driver labpc_driver = {
 104        .driver_name    = "ni_labpc",
 105        .module         = THIS_MODULE,
 106        .attach         = labpc_attach,
 107        .detach         = labpc_detach,
 108        .num_names      = ARRAY_SIZE(labpc_boards),
 109        .board_name     = &labpc_boards[0].name,
 110        .offset         = sizeof(struct labpc_boardinfo),
 111};
 112module_comedi_driver(labpc_driver);
 113
 114MODULE_AUTHOR("Comedi http://www.comedi.org");
 115MODULE_DESCRIPTION("Comedi driver for NI Lab-PC ISA boards");
 116MODULE_LICENSE("GPL");
 117