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Linux/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");
142 

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