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Linux/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 <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/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 <arthur.benilov@iba-group.com>");
109 MODULE_LICENSE("GPL");
110 
111 

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