drivers/staging/comedi/drivers/ni_labpc_pci.c

   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
  30 enum labpc_pci_boardid {
  31         BOARD_NI_PCI1200,
  32 };
  33
  34 static 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
  48 static 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
  67 static 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
  96 static void labpc_pci_detach(struct comedi_device *dev)
  97 {
  98         labpc_common_detach(dev);
  99         comedi_pci_detach(dev);
 100 }
 101
 102 static 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
 109 static const struct pci_device_id labpc_pci_table[] = {
 110         { PCI_VDEVICE(NI, 0x161), BOARD_NI_PCI1200 },
 111         { 0 }
 112 };
 113 MODULE_DEVICE_TABLE(pci, labpc_pci_table);
 114
 115 static 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
 122 static 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 };
 128 module_comedi_pci_driver(labpc_pci_comedi_driver, labpc_pci_driver);
 129
 130 MODULE_DESCRIPTION("Comedi: National Instruments Lab-PC PCI-1200 driver");
 131 MODULE_AUTHOR("Comedi https://www.comedi.org");
 132 MODULE_LICENSE("GPL");