LXR linux/drivers/vme/boards/vme

   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
  18static int vmic_probe(struct pci_dev *, const struct pci_device_id *);
  19static void vmic_remove(struct pci_dev *);
  20
  21/** Base address to access FPGA register */
  22static void __iomem *vmic_base;
  23
  24static const char driver_name[] = "vmivme_7805";
  25
  26static const struct pci_device_id vmic_ids[] = {
  27        { PCI_DEVICE(PCI_VENDOR_ID_VMIC, PCI_DEVICE_ID_VTIMR) },
  28        { },
  29};
  30
  31static struct pci_driver vmic_driver = {
  32        .name = driver_name,
  33        .id_table = vmic_ids,
  34        .probe = vmic_probe,
  35        .remove = vmic_remove,
  36};
  37
  38static 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(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
  85err_remap:
  86        pci_release_regions(pdev);
  87err_resource:
  88        pci_disable_device(pdev);
  89err:
  90        return retval;
  91}
  92
  93static 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
 101module_pci_driver(vmic_driver);
 102
 103MODULE_DESCRIPTION("VMIVME-7805 board support driver");
 104MODULE_AUTHOR("Arthur Benilov <arthur.benilov@iba-group.com>");
 105MODULE_LICENSE("GPL");
 106
 107