Commit 3c2aabc4 authored by Arthur Benilov's avatar Arthur Benilov Committed by Greg Kroah-Hartman

Staging: vme: VMIVME-7805 board support

VMIVME-7805 board has a special control register that has to be used in
order to activate the VME bus access via the Universe II bridge.
This control register also handles endianess convertion.
Signed-off-by: default avatarArthur Benilov <arthur.benilov@iba-group.com>
Signed-off-by: default avatarVincent Bossier <vincent.bossier@iba-group.com>
Acked-by: default avatarMartyn Welch <martyn.welch@ge.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 33e920d9
......@@ -14,4 +14,6 @@ source "drivers/staging/vme/bridges/Kconfig"
source "drivers/staging/vme/devices/Kconfig"
source "drivers/staging/vme/boards/Kconfig"
endif # VME
......@@ -5,3 +5,4 @@ obj-$(CONFIG_VME_BUS) += vme.o
obj-y += bridges/
obj-y += devices/
obj-y += boards/
comment "VME Board Drivers"
config VMIVME_7805
tristate "VMIVME-7805"
help
If you say Y here you get support for the VMIVME-7805 board.
This board has an additional control interface to the Universe II
chip. This driver has to be included if you want to access VME bus
with VMIVME-7805 board.
#
# Makefile for the VME board drivers.
#
obj-$(CONFIG_VMIVME_7805) += vme_vmivme7805.o
/*
* Support for the VMIVME-7805 board access to the Universe II bridge.
*
* Author: Arthur Benilov <arthur.benilov@iba-group.com>
* Copyright 2010 Ion Beam Application, Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#include <linux/version.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/pci.h>
#include <linux/poll.h>
#include <linux/io.h>
#include "vme_vmivme7805.h"
static int __init vmic_init(void);
static int vmic_probe(struct pci_dev *, const struct pci_device_id *);
static void vmic_remove(struct pci_dev *);
static void __exit vmic_exit(void);
/** Base address to access FPGA register */
static void *vmic_base;
static char driver_name[] = "vmivme_7805";
static struct pci_device_id vmic_ids[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_VMIC, PCI_DEVICE_ID_VTIMR) },
{ },
};
static struct pci_driver vmic_driver = {
.name = driver_name,
.id_table = vmic_ids,
.probe = vmic_probe,
.remove = vmic_remove,
};
static int __init vmic_init(void)
{
return pci_register_driver(&vmic_driver);
}
static int vmic_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
int retval;
u32 data;
/* Enable the device */
retval = pci_enable_device(pdev);
if (retval) {
dev_err(&pdev->dev, "Unable to enable device\n");
goto err;
}
/* Map Registers */
retval = pci_request_regions(pdev, driver_name);
if (retval) {
dev_err(&pdev->dev, "Unable to reserve resources\n");
goto err_resource;
}
/* Map registers in BAR 0 */
vmic_base = ioremap_nocache(pci_resource_start(pdev, 0), 16);
if (!vmic_base) {
dev_err(&pdev->dev, "Unable to remap CRG region\n");
retval = -EIO;
goto err_remap;
}
/* Clear the FPGA VME IF contents */
iowrite32(0, vmic_base + VME_CONTROL);
/* Clear any initial BERR */
data = ioread32(vmic_base + VME_CONTROL) & 0x00000FFF;
data |= BM_VME_CONTROL_BERRST;
iowrite32(data, vmic_base + VME_CONTROL);
/* Enable the vme interface and byte swapping */
data = ioread32(vmic_base + VME_CONTROL) & 0x00000FFF;
data = data | BM_VME_CONTROL_MASTER_ENDIAN |
BM_VME_CONTROL_SLAVE_ENDIAN |
BM_VME_CONTROL_ABLE |
BM_VME_CONTROL_BERRI |
BM_VME_CONTROL_BPENA |
BM_VME_CONTROL_VBENA;
iowrite32(data, vmic_base + VME_CONTROL);
return 0;
err_remap:
pci_release_regions(pdev);
err_resource:
pci_disable_device(pdev);
err:
return retval;
}
static void vmic_remove(struct pci_dev *pdev)
{
iounmap(vmic_base);
pci_release_regions(pdev);
pci_disable_device(pdev);
}
static void __exit vmic_exit(void)
{
pci_unregister_driver(&vmic_driver);
}
MODULE_DESCRIPTION("VMIVME-7805 board support driver");
MODULE_AUTHOR("Arthur Benilov <arthur.benilov@iba-group.com>");
MODULE_LICENSE("GPL");
module_init(vmic_init);
module_exit(vmic_exit);
/*
* vmivme_7805.h
*
* Support for the VMIVME-7805 board access to the Universe II bridge.
*
* Author: Arthur Benilov <arthur.benilov@iba-group.com>
* Copyright 2010 Ion Beam Application, Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#ifndef _VMIVME_7805_H
#define _VMIVME_7805_H
#ifndef PCI_VENDOR_ID_VMIC
#define PCI_VENDOR_ID_VMIC 0x114A
#endif
#ifndef PCI_DEVICE_ID_VTIMR
#define PCI_DEVICE_ID_VTIMR 0x0004
#endif
#define VME_CONTROL 0x0000
#define BM_VME_CONTROL_MASTER_ENDIAN 0x0001
#define BM_VME_CONTROL_SLAVE_ENDIAN 0x0002
#define BM_VME_CONTROL_ABLE 0x0004
#define BM_VME_CONTROL_BERRI 0x0040
#define BM_VME_CONTROL_BERRST 0x0080
#define BM_VME_CONTROL_BPENA 0x0400
#define BM_VME_CONTROL_VBENA 0x0800
#endif /* _VMIVME_7805_H */
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