From: Arthur Benilov Date: Tue, 16 Feb 2010 14:41:51 +0000 (+0100) Subject: Staging: vme: VMIVME-7805 board support X-Git-Tag: firefly_0821_release~9833^2~2832^2~1^2~51 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=3c2aabc41da7e9f957bc826363115a54764fb396;p=firefly-linux-kernel-4.4.55.git 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: Arthur Benilov Signed-off-by: Vincent Bossier Acked-by: Martyn Welch Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/vme/Kconfig b/drivers/staging/vme/Kconfig index ae628a58b0c6..6411ae51ed3f 100644 --- a/drivers/staging/vme/Kconfig +++ b/drivers/staging/vme/Kconfig @@ -14,4 +14,6 @@ source "drivers/staging/vme/bridges/Kconfig" source "drivers/staging/vme/devices/Kconfig" +source "drivers/staging/vme/boards/Kconfig" + endif # VME diff --git a/drivers/staging/vme/Makefile b/drivers/staging/vme/Makefile index 8c3b90ee5853..b4ea3f8d0a50 100644 --- a/drivers/staging/vme/Makefile +++ b/drivers/staging/vme/Makefile @@ -5,3 +5,4 @@ obj-$(CONFIG_VME_BUS) += vme.o obj-y += bridges/ obj-y += devices/ +obj-y += boards/ diff --git a/drivers/staging/vme/boards/Kconfig b/drivers/staging/vme/boards/Kconfig new file mode 100644 index 000000000000..761631353527 --- /dev/null +++ b/drivers/staging/vme/boards/Kconfig @@ -0,0 +1,9 @@ +comment "VME Board Drivers" + +config VMIVME_7805 + tristate "VMIVME-7805" + help + If you say Y here you get support for the VMIVME-7805 board. + This board has an additional control interface to the Universe II + chip. This driver has to be included if you want to access VME bus + with VMIVME-7805 board. diff --git a/drivers/staging/vme/boards/Makefile b/drivers/staging/vme/boards/Makefile new file mode 100644 index 000000000000..43658340885d --- /dev/null +++ b/drivers/staging/vme/boards/Makefile @@ -0,0 +1,5 @@ +# +# Makefile for the VME board drivers. +# + +obj-$(CONFIG_VMIVME_7805) += vme_vmivme7805.o diff --git a/drivers/staging/vme/boards/vme_vmivme7805.c b/drivers/staging/vme/boards/vme_vmivme7805.c new file mode 100644 index 000000000000..843c9edde555 --- /dev/null +++ b/drivers/staging/vme/boards/vme_vmivme7805.c @@ -0,0 +1,124 @@ +/* + * Support for the VMIVME-7805 board access to the Universe II bridge. + * + * Author: Arthur Benilov + * 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 +#include +#include +#include +#include +#include +#include + +#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 "); +MODULE_LICENSE("GPL"); + +module_init(vmic_init); +module_exit(vmic_exit); + diff --git a/drivers/staging/vme/boards/vme_vmivme7805.h b/drivers/staging/vme/boards/vme_vmivme7805.h new file mode 100644 index 000000000000..44c2c449808c --- /dev/null +++ b/drivers/staging/vme/boards/vme_vmivme7805.h @@ -0,0 +1,37 @@ +/* + * vmivme_7805.h + * + * Support for the VMIVME-7805 board access to the Universe II bridge. + * + * Author: Arthur Benilov + * 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 */ +