LXR linux/drivers/comedi/drivers/ni_labpc

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * comedi/drivers/ni_labpc_pci.c
   4 * Driver for National Instruments Lab-PC PCI-1200
   5 * Copyright (C) 2001, 2002, 2003 Frank Mori Hess <fmhess@users.sourceforge.net>
   6 */
   7
   8/*
   9 * Driver: ni_labpc_pci
  10 * Description: National Instruments Lab-PC PCI-1200
  11 * Devices: [National Instruments] PCI-1200 (ni_pci-1200)
  12 * Author: Frank Mori Hess <fmhess@users.sourceforge.net>
  13 * Status: works
  14 *
  15 * This is the PCI-specific support split off from the ni_labpc driver.
  16 *
  17 * Configuration Options: not applicable, uses PCI auto config
  18 *
  19 * NI manuals:
  20 * 340914a (pci-1200)
  21 */
  22
  23#include <linux/module.h>
  24#include <linux/interrupt.h>
  25
  26#include "../comedi_pci.h"
  27
  28#include "ni_labpc.h"
  29
  30enum labpc_pci_boardid {
  31        BOARD_NI_PCI1200,
  32};
  33
  34static const struct labpc_boardinfo labpc_pci_boards[] = {
  35        [BOARD_NI_PCI1200] = {
  36                .name                   = "ni_pci-1200",
  37                .ai_speed               = 10000,
  38                .ai_scan_up             = 1,
  39                .has_ao                 = 1,
  40                .is_labpc1200           = 1,
  41        },
  42};
  43
  44/* ripped from mite.h and mite_setup2() to avoid mite dependency */
  45#define MITE_IODWBSR    0xc0    /* IO Device Window Base Size Register */
  46#define WENAB           BIT(7)  /* window enable */
  47
  48static int labpc_pci_mite_init(struct pci_dev *pcidev)
  49{
  50        void __iomem *mite_base;
  51        u32 main_phys_addr;
  52
  53        /* ioremap the MITE registers (BAR 0) temporarily */
  54        mite_base = pci_ioremap_bar(pcidev, 0);
  55        if (!mite_base)
  56                return -ENOMEM;
  57
  58        /* set data window to main registers (BAR 1) */
  59        main_phys_addr = pci_resource_start(pcidev, 1);
  60        writel(main_phys_addr | WENAB, mite_base + MITE_IODWBSR);
  61
  62        /* finished with MITE registers */
  63        iounmap(mite_base);
  64        return 0;
  65}
  66
  67static int labpc_pci_auto_attach(struct comedi_device *dev,
  68                                 unsigned long context)
  69{
  70        struct pci_dev *pcidev = comedi_to_pci_dev(dev);
  71        const struct labpc_boardinfo *board = NULL;
  72        int ret;
  73
  74        if (context < ARRAY_SIZE(labpc_pci_boards))
  75                board = &labpc_pci_boards[context];
  76        if (!board)
  77                return -ENODEV;
  78        dev->board_ptr = board;
  79        dev->board_name = board->name;
  80
  81        ret = comedi_pci_enable(dev);
  82        if (ret)
  83                return ret;
  84
  85        ret = labpc_pci_mite_init(pcidev);
  86        if (ret)
  87                return ret;
  88
  89        dev->mmio = pci_ioremap_bar(pcidev, 1);
  90        if (!dev->mmio)
  91                return -ENOMEM;
  92
  93        return labpc_common_attach(dev, pcidev->irq, IRQF_SHARED);
  94}
  95
  96static void labpc_pci_detach(struct comedi_device *dev)
  97{
  98        labpc_common_detach(dev);
  99        comedi_pci_detach(dev);
 100}
 101
 102static struct comedi_driver labpc_pci_comedi_driver = {
 103        .driver_name    = "labpc_pci",
 104        .module         = THIS_MODULE,
 105        .auto_attach    = labpc_pci_auto_attach,
 106        .detach         = labpc_pci_detach,
 107};
 108
 109static const struct pci_device_id labpc_pci_table[] = {
 110        { PCI_VDEVICE(NI, 0x161), BOARD_NI_PCI1200 },
 111        { 0 }
 112};
 113MODULE_DEVICE_TABLE(pci, labpc_pci_table);
 114
 115static int labpc_pci_probe(struct pci_dev *dev,
 116                           const struct pci_device_id *id)
 117{
 118        return comedi_pci_auto_config(dev, &labpc_pci_comedi_driver,
 119                                      id->driver_data);
 120}
 121
 122static struct pci_driver labpc_pci_driver = {
 123        .name           = "labpc_pci",
 124        .id_table       = labpc_pci_table,
 125        .probe          = labpc_pci_probe,
 126        .remove         = comedi_pci_auto_unconfig,
 127};
 128module_comedi_pci_driver(labpc_pci_comedi_driver, labpc_pci_driver);
 129
 130MODULE_DESCRIPTION("Comedi: National Instruments Lab-PC PCI-1200 driver");
 131MODULE_AUTHOR("Comedi https://www.comedi.org");
 132MODULE_LICENSE("GPL");
 133