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https://github.com/torvalds/linux
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107 lines
3.6 KiB
C
107 lines
3.6 KiB
C
/*
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* BRIEF MODULE DESCRIPTION
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* Galileo Evaluation Boards PCI support.
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*
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* The general-purpose functions to read/write and configure the GT64120A's
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* PCI registers (function names start with pci0 or pci1) are either direct
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* copies of functions written by Galileo Technology, or are modifications
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* of their functions to work with Linux 2.4 vs Linux 2.2. These functions
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* are Copyright - Galileo Technology.
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*
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* Other functions are derived from other MIPS PCI implementations, or were
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* written by RidgeRun, Inc, Copyright (C) 2000 RidgeRun, Inc.
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* glonnon@ridgerun.com, skranz@ridgerun.com, stevej@ridgerun.com
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*
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* Copyright 2001 MontaVista Software Inc.
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* Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
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* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/init.h>
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#include <linux/types.h>
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#include <linux/pci.h>
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/cache.h>
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#include <asm/pci.h>
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#include <asm/io.h>
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#include <asm/gt64120.h>
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static inline unsigned int pci0ReadConfigReg(unsigned int offset)
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{
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unsigned int DataForRegCf8;
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unsigned int data;
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DataForRegCf8 = ((PCI_SLOT(device->devfn) << 11) |
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(PCI_FUNC(device->devfn) << 8) |
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(offset & ~0x3)) | 0x80000000;
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GT_WRITE(GT_PCI0_CFGADDR_OFS, DataForRegCf8);
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GT_READ(GT_PCI0_CFGDATA_OFS, &data);
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return data;
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}
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static inline void pci0WriteConfigReg(unsigned int offset, unsigned int data)
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{
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unsigned int DataForRegCf8;
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DataForRegCf8 = ((PCI_SLOT(device->devfn) << 11) |
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(PCI_FUNC(device->devfn) << 8) |
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(offset & ~0x3)) | 0x80000000;
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GT_WRITE(GT_PCI0_CFGADDR_OFS, DataForRegCf8);
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GT_WRITE(GT_PCI0_CFGDATA_OFS, data);
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}
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static struct resource ocelot_mem_resource = {
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start = GT_PCI_MEM_BASE;
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end = GT_PCI_MEM_BASE + GT_PCI_MEM_BASE - 1;
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};
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static struct resource ocelot_io_resource = {
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start = GT_PCI_IO_BASE;
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end = GT_PCI_IO_BASE + GT_PCI_IO_SIZE - 1;
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};
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static struct pci_controller ocelot_pci_controller = {
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.pci_ops = gt64120_pci_ops;
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.mem_resource = &ocelot_mem_resource;
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.io_resource = &ocelot_io_resource;
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};
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static int __init ocelot_pcibios_init(void)
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{
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u32 tmp;
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GT_READ(GT_PCI0_CMD_OFS, &tmp);
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GT_READ(GT_PCI0_BARE_OFS, &tmp);
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/*
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* You have to enable bus mastering to configure any other
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* card on the bus.
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*/
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tmp = pci0ReadConfigReg(PCI_COMMAND);
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tmp |= PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | PCI_COMMAND_SERR;
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pci0WriteConfigReg(PCI_COMMAND, tmp);
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register_pci_controller(&ocelot_pci_controller);
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}
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arch_initcall(ocelot_pcibios_init);
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