drivers/vme/boards/vme_vmivme7805.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Support for the VMIVME-7805 board access to the Universe II bridge.
   4  *
   5  * Author: Arthur Benilov <arthur.benilov@iba-group.com>
   6  * Copyright 2010 Ion Beam Application, Inc.
   7  */
   8
   9 #include <linux/module.h>
  10 #include <linux/types.h>
  11 #include <linux/errno.h>
  12 #include <linux/pci.h>
  13 #include <linux/poll.h>
  14 #include <linux/io.h>
  15
  16 #include "vme_vmivme7805.h"
  17
  18 static int vmic_probe(struct pci_dev *, const struct pci_device_id *);
  19 static void vmic_remove(struct pci_dev *);
  20
  21 /** Base address to access FPGA register */
  22 static void __iomem *vmic_base;
  23
  24 static const char driver_name[] = "vmivme_7805";
  25
  26 static const struct pci_device_id vmic_ids[] = {
  27         { PCI_DEVICE(PCI_VENDOR_ID_VMIC, PCI_DEVICE_ID_VTIMR) },
  28         { },
  29 };
  30
  31 static struct pci_driver vmic_driver = {
  32         .name = driver_name,
  33         .id_table = vmic_ids,
  34         .probe = vmic_probe,
  35         .remove = vmic_remove,
  36 };
  37
  38 static int vmic_probe(struct pci_dev *pdev, const struct pci_device_id *id)
  39 {
  40         int retval;
  41         u32 data;
  42
  43         /* Enable the device */
  44         retval = pci_enable_device(pdev);
  45         if (retval) {
  46                 dev_err(&pdev->dev, "Unable to enable device\n");
  47                 goto err;
  48         }
  49
  50         /* Map Registers */
  51         retval = pci_request_regions(pdev, driver_name);
  52         if (retval) {
  53                 dev_err(&pdev->dev, "Unable to reserve resources\n");
  54                 goto err_resource;
  55         }
  56
  57         /* Map registers in BAR 0 */
  58         vmic_base = ioremap_nocache(pci_resource_start(pdev, 0), 16);
  59         if (!vmic_base) {
  60                 dev_err(&pdev->dev, "Unable to remap CRG region\n");
  61                 retval = -EIO;
  62                 goto err_remap;
  63         }
  64
  65         /* Clear the FPGA VME IF contents */
  66         iowrite32(0, vmic_base + VME_CONTROL);
  67
  68         /* Clear any initial BERR  */
  69         data = ioread32(vmic_base + VME_CONTROL) & 0x00000FFF;
  70         data |= BM_VME_CONTROL_BERRST;
  71         iowrite32(data, vmic_base + VME_CONTROL);
  72
  73         /* Enable the vme interface and byte swapping */
  74         data = ioread32(vmic_base + VME_CONTROL) & 0x00000FFF;
  75         data = data | BM_VME_CONTROL_MASTER_ENDIAN |
  76                         BM_VME_CONTROL_SLAVE_ENDIAN |
  77                         BM_VME_CONTROL_ABLE |
  78                         BM_VME_CONTROL_BERRI |
  79                         BM_VME_CONTROL_BPENA |
  80                         BM_VME_CONTROL_VBENA;
  81         iowrite32(data, vmic_base + VME_CONTROL);
  82
  83         return 0;
  84
  85 err_remap:
  86         pci_release_regions(pdev);
  87 err_resource:
  88         pci_disable_device(pdev);
  89 err:
  90         return retval;
  91 }
  92
  93 static void vmic_remove(struct pci_dev *pdev)
  94 {
  95         iounmap(vmic_base);
  96         pci_release_regions(pdev);
  97         pci_disable_device(pdev);
  98
  99 }
 100
 101 module_pci_driver(vmic_driver);
 102
 103 MODULE_DESCRIPTION("VMIVME-7805 board support driver");
 104 MODULE_AUTHOR("Arthur Benilov <arthur.benilov@iba-group.com>");
 105 MODULE_LICENSE("GPL");
 106