drivers/staging/comedi/drivers/ni_labpc_pci.c

   1 /*
   2  * comedi/drivers/ni_labpc_pci.c
   3  * Driver for National Instruments Lab-PC PCI-1200
   4  * Copyright (C) 2001, 2002, 2003 Frank Mori Hess <fmhess@users.sourceforge.net>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  */
  16
  17 /*
  18  * Driver: ni_labpc_pci
  19  * Description: National Instruments Lab-PC PCI-1200
  20  * Devices: (National Instruments) PCI-1200 [ni_pci-1200]
  21  * Author: Frank Mori Hess <fmhess@users.sourceforge.net>
  22  * Status: works
  23  *
  24  * This is the PCI-specific support split off from the ni_labpc driver.
  25  *
  26  * Configuration Options: not applicable, uses PCI auto config
  27  *
  28  * NI manuals:
  29  * 340914a (pci-1200)
  30  */
  31
  32 #include <linux/module.h>
  33 #include <linux/interrupt.h>
  34 #include <linux/pci.h>
  35
  36 #include "../comedidev.h"
  37
  38 #include "ni_labpc.h"
  39
  40 enum labpc_pci_boardid {
  41         BOARD_NI_PCI1200,
  42 };
  43
  44 static const struct labpc_boardinfo labpc_pci_boards[] = {
  45         [BOARD_NI_PCI1200] = {
  46                 .name                   = "ni_pci-1200",
  47                 .ai_speed               = 10000,
  48                 .ai_scan_up             = 1,
  49                 .has_ao                 = 1,
  50                 .is_labpc1200           = 1,
  51         },
  52 };
  53
  54 /* ripped from mite.h and mite_setup2() to avoid mite dependancy */
  55 #define MITE_IODWBSR    0xc0     /* IO Device Window Base Size Register */
  56 #define WENAB           (1 << 7) /* window enable */
  57
  58 static int labpc_pci_mite_init(struct pci_dev *pcidev)
  59 {
  60         void __iomem *mite_base;
  61         u32 main_phys_addr;
  62
  63         /* ioremap the MITE registers (BAR 0) temporarily */
  64         mite_base = pci_ioremap_bar(pcidev, 0);
  65         if (!mite_base)
  66                 return -ENOMEM;
  67
  68         /* set data window to main registers (BAR 1) */
  69         main_phys_addr = pci_resource_start(pcidev, 1);
  70         writel(main_phys_addr | WENAB, mite_base + MITE_IODWBSR);
  71
  72         /* finished with MITE registers */
  73         iounmap(mite_base);
  74         return 0;
  75 }
  76
  77 static int labpc_pci_auto_attach(struct comedi_device *dev,
  78                                  unsigned long context)
  79 {
  80         struct pci_dev *pcidev = comedi_to_pci_dev(dev);
  81         const struct labpc_boardinfo *board = NULL;
  82         struct labpc_private *devpriv;
  83         int ret;
  84
  85         if (context < ARRAY_SIZE(labpc_pci_boards))
  86                 board = &labpc_pci_boards[context];
  87         if (!board)
  88                 return -ENODEV;
  89         dev->board_ptr = board;
  90         dev->board_name = board->name;
  91
  92         ret = comedi_pci_enable(dev);
  93         if (ret)
  94                 return ret;
  95
  96         ret = labpc_pci_mite_init(pcidev);
  97         if (ret)
  98                 return ret;
  99
 100         dev->mmio = pci_ioremap_bar(pcidev, 1);
 101         if (!dev->mmio)
 102                 return -ENOMEM;
 103
 104         devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
 105         if (!devpriv)
 106                 return -ENOMEM;
 107
 108         return labpc_common_attach(dev, pcidev->irq, IRQF_SHARED);
 109 }
 110
 111 static struct comedi_driver labpc_pci_comedi_driver = {
 112         .driver_name    = "labpc_pci",
 113         .module         = THIS_MODULE,
 114         .auto_attach    = labpc_pci_auto_attach,
 115         .detach         = comedi_pci_detach,
 116 };
 117
 118 static const struct pci_device_id labpc_pci_table[] = {
 119         { PCI_VDEVICE(NI, 0x161), BOARD_NI_PCI1200 },
 120         { 0 }
 121 };
 122 MODULE_DEVICE_TABLE(pci, labpc_pci_table);
 123
 124 static int labpc_pci_probe(struct pci_dev *dev,
 125                            const struct pci_device_id *id)
 126 {
 127         return comedi_pci_auto_config(dev, &labpc_pci_comedi_driver,
 128                                       id->driver_data);
 129 }
 130
 131 static struct pci_driver labpc_pci_driver = {
 132         .name           = "labpc_pci",
 133         .id_table       = labpc_pci_table,
 134         .probe          = labpc_pci_probe,
 135         .remove         = comedi_pci_auto_unconfig,
 136 };
 137 module_comedi_pci_driver(labpc_pci_comedi_driver, labpc_pci_driver);
 138
 139 MODULE_DESCRIPTION("Comedi: National Instruments Lab-PC PCI-1200 driver");
 140 MODULE_AUTHOR("Comedi http://www.comedi.org");
 141 MODULE_LICENSE("GPL");