drivers/staging/vme/boards/vme_vmivme7805.c

   1 /*
   2  * Support for the VMIVME-7805 board access to the Universe II bridge.
   3  *
   4  * Author: Arthur Benilov <arthur.benilov@iba-group.com>
   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/version.h>
  14 #include <linux/module.h>
  15 #include <linux/types.h>
  16 #include <linux/errno.h>
  17 #include <linux/pci.h>
  18 #include <linux/poll.h>
  19 #include <linux/io.h>
  20
  21 #include "vme_vmivme7805.h"
  22
  23 static int __init vmic_init(void);
  24 static int vmic_probe(struct pci_dev *, const struct pci_device_id *);
  25 static void vmic_remove(struct pci_dev *);
  26 static void __exit vmic_exit(void);
  27
  28 /** Base address to access FPGA register */
  29 static void *vmic_base;
  30
  31 static char driver_name[] = "vmivme_7805";
  32
  33 static struct pci_device_id vmic_ids[] = {
  34         { PCI_DEVICE(PCI_VENDOR_ID_VMIC, PCI_DEVICE_ID_VTIMR) },
  35         { },
  36 };
  37
  38 static struct pci_driver vmic_driver = {
  39         .name = driver_name,
  40         .id_table = vmic_ids,
  41         .probe = vmic_probe,
  42         .remove = vmic_remove,
  43 };
  44
  45 static int __init vmic_init(void)
  46 {
  47         return pci_register_driver(&vmic_driver);
  48 }
  49
  50 static int vmic_probe(struct pci_dev *pdev, const struct pci_device_id *id)
  51 {
  52         int retval;
  53         u32 data;
  54
  55         /* Enable the device */
  56         retval = pci_enable_device(pdev);
  57         if (retval) {
  58                 dev_err(&pdev->dev, "Unable to enable device\n");
  59                 goto err;
  60         }
  61
  62         /* Map Registers */
  63         retval = pci_request_regions(pdev, driver_name);
  64         if (retval) {
  65                 dev_err(&pdev->dev, "Unable to reserve resources\n");
  66                 goto err_resource;
  67         }
  68
  69         /* Map registers in BAR 0 */
  70         vmic_base = ioremap_nocache(pci_resource_start(pdev, 0), 16);
  71         if (!vmic_base) {
  72                 dev_err(&pdev->dev, "Unable to remap CRG region\n");
  73                 retval = -EIO;
  74                 goto err_remap;
  75         }
  76
  77         /* Clear the FPGA VME IF contents */
  78         iowrite32(0, vmic_base + VME_CONTROL);
  79
  80         /* Clear any initial BERR  */
  81         data = ioread32(vmic_base + VME_CONTROL) & 0x00000FFF;
  82         data |= BM_VME_CONTROL_BERRST;
  83         iowrite32(data, vmic_base + VME_CONTROL);
  84
  85         /* Enable the vme interface and byte swapping */
  86         data = ioread32(vmic_base + VME_CONTROL) & 0x00000FFF;
  87         data = data | BM_VME_CONTROL_MASTER_ENDIAN |
  88                         BM_VME_CONTROL_SLAVE_ENDIAN |
  89                         BM_VME_CONTROL_ABLE |
  90                         BM_VME_CONTROL_BERRI |
  91                         BM_VME_CONTROL_BPENA |
  92                         BM_VME_CONTROL_VBENA;
  93         iowrite32(data, vmic_base + VME_CONTROL);
  94
  95         return 0;
  96
  97 err_remap:
  98         pci_release_regions(pdev);
  99 err_resource:
 100         pci_disable_device(pdev);
 101 err:
 102         return retval;
 103 }
 104
 105 static void vmic_remove(struct pci_dev *pdev)
 106 {
 107         iounmap(vmic_base);
 108         pci_release_regions(pdev);
 109         pci_disable_device(pdev);
 110
 111 }
 112
 113 static void __exit vmic_exit(void)
 114 {
 115         pci_unregister_driver(&vmic_driver);
 116 }
 117
 118 MODULE_DESCRIPTION("VMIVME-7805 board support driver");
 119 MODULE_AUTHOR("Arthur Benilov <arthur.benilov@iba-group.com>");
 120 MODULE_LICENSE("GPL");
 121
 122 module_init(vmic_init);
 123 module_exit(vmic_exit);
 124