drivers/vme/boards/vme_vmivme7805.c

   1 /*
   2  * Support for the VMIVME-7805 board access to the Universe II bridge.
   3  *
   4  * Author: Arthur Benilov <[email protected]>
   5  * Copyright 2010 Ion Beam Application, Inc.
   6  *
   7  * This program is free software; you can redistribute  it and/or modify it
   8  * under  the terms of  the GNU General  Public License as published by the
   9  * Free Software Foundation;  either version 2 of the  License, or (at your
  10  * option) any later version.
  11  */
  12
  13 #include <linux/module.h>
  14 #include <linux/types.h>
  15 #include <linux/errno.h>
  16 #include <linux/pci.h>
  17 #include <linux/poll.h>
  18 #include <linux/io.h>
  19
  20 #include "vme_vmivme7805.h"
  21
  22 static int vmic_probe(struct pci_dev *, const struct pci_device_id *);
  23 static void vmic_remove(struct pci_dev *);
  24
  25 /** Base address to access FPGA register */
  26 static void __iomem *vmic_base;
  27
  28 static const char driver_name[] = "vmivme_7805";
  29
  30 static const struct pci_device_id vmic_ids[] = {
  31         { PCI_DEVICE(PCI_VENDOR_ID_VMIC, PCI_DEVICE_ID_VTIMR) },
  32         { },
  33 };
  34
  35 static struct pci_driver vmic_driver = {
  36         .name = driver_name,
  37         .id_table = vmic_ids,
  38         .probe = vmic_probe,
  39         .remove = vmic_remove,
  40 };
  41
  42 static int vmic_probe(struct pci_dev *pdev, const struct pci_device_id *id)
  43 {
  44         int retval;
  45         u32 data;
  46
  47         /* Enable the device */
  48         retval = pci_enable_device(pdev);
  49         if (retval) {
  50                 dev_err(&pdev->dev, "Unable to enable device\n");
  51                 goto err;
  52         }
  53
  54         /* Map Registers */
  55         retval = pci_request_regions(pdev, driver_name);
  56         if (retval) {
  57                 dev_err(&pdev->dev, "Unable to reserve resources\n");
  58                 goto err_resource;
  59         }
  60
  61         /* Map registers in BAR 0 */
  62         vmic_base = ioremap_nocache(pci_resource_start(pdev, 0), 16);
  63         if (!vmic_base) {
  64                 dev_err(&pdev->dev, "Unable to remap CRG region\n");
  65                 retval = -EIO;
  66                 goto err_remap;
  67         }
  68
  69         /* Clear the FPGA VME IF contents */
  70         iowrite32(0, vmic_base + VME_CONTROL);
  71
  72         /* Clear any initial BERR  */
  73         data = ioread32(vmic_base + VME_CONTROL) & 0x00000FFF;
  74         data |= BM_VME_CONTROL_BERRST;
  75         iowrite32(data, vmic_base + VME_CONTROL);
  76
  77         /* Enable the vme interface and byte swapping */
  78         data = ioread32(vmic_base + VME_CONTROL) & 0x00000FFF;
  79         data = data | BM_VME_CONTROL_MASTER_ENDIAN |
  80                         BM_VME_CONTROL_SLAVE_ENDIAN |
  81                         BM_VME_CONTROL_ABLE |
  82                         BM_VME_CONTROL_BERRI |
  83                         BM_VME_CONTROL_BPENA |
  84                         BM_VME_CONTROL_VBENA;
  85         iowrite32(data, vmic_base + VME_CONTROL);
  86
  87         return 0;
  88
  89 err_remap:
  90         pci_release_regions(pdev);
  91 err_resource:
  92         pci_disable_device(pdev);
  93 err:
  94         return retval;
  95 }
  96
  97 static void vmic_remove(struct pci_dev *pdev)
  98 {
  99         iounmap(vmic_base);
 100         pci_release_regions(pdev);
 101         pci_disable_device(pdev);
 102
 103 }
 104
 105 module_pci_driver(vmic_driver);
 106
 107 MODULE_DESCRIPTION("VMIVME-7805 board support driver");
 108 MODULE_AUTHOR("Arthur Benilov <[email protected]>");
 109 MODULE_LICENSE("GPL");
 110