2 * BRIEF MODULE DESCRIPTION
3 * Alchemy/AMD Au1x00 pci support.
5 * Copyright 2001,2002,2003 MontaVista Software Inc.
6 * Author: MontaVista Software, Inc.
7 * ppopov@mvista.com or source@mvista.com
9 * Copyright (C) 2004 by Ralf Baechle (ralf@linux-mips.org)
11 * Support for all devices (greater than 16) added by David Gathright.
13 * This program is free software; you can redistribute it and/or modify it
14 * under the terms of the GNU General Public License as published by the
15 * Free Software Foundation; either version 2 of the License, or (at your
16 * option) any later version.
18 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
19 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
20 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
21 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
24 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
25 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 * You should have received a copy of the GNU General Public License along
30 * with this program; if not, write to the Free Software Foundation, Inc.,
31 * 675 Mass Ave, Cambridge, MA 02139, USA.
33 #include <linux/types.h>
34 #include <linux/pci.h>
35 #include <linux/kernel.h>
36 #include <linux/init.h>
38 #include <asm/mach-au1x00/au1000.h>
41 static struct resource pci_io_resource = {
42 .start = PCI_IO_START,
44 .name = "PCI IO space",
45 .flags = IORESOURCE_IO
48 static struct resource pci_mem_resource = {
49 .start = PCI_MEM_START,
51 .name = "PCI memory space",
52 .flags = IORESOURCE_MEM
55 extern struct pci_ops au1x_pci_ops;
57 static struct pci_controller au1x_controller = {
58 .pci_ops = &au1x_pci_ops,
59 .io_resource = &pci_io_resource,
60 .mem_resource = &pci_mem_resource,
63 #if defined(CONFIG_SOC_AU1500) || defined(CONFIG_SOC_AU1550)
64 static unsigned long virt_io_addr;
67 static int __init au1x_pci_setup(void)
69 #if defined(CONFIG_SOC_AU1500) || defined(CONFIG_SOC_AU1550)
70 virt_io_addr = (unsigned long)ioremap(Au1500_PCI_IO_START,
71 Au1500_PCI_IO_END - Au1500_PCI_IO_START + 1);
74 printk(KERN_ERR "Unable to ioremap pci space\n");
78 #ifdef CONFIG_DMA_NONCOHERENT
80 * Set the NC bit in controller for Au1500 pre-AC silicon
82 u32 prid = read_c0_prid();
83 if ( (prid & 0xFF000000) == 0x01000000 && prid < 0x01030202) {
84 au_writel( 1<<16 | au_readl(Au1500_PCI_CFG), Au1500_PCI_CFG);
85 printk("Non-coherent PCI accesses enabled\n");
89 set_io_port_base(virt_io_addr);
92 register_pci_controller(&au1x_controller);
96 arch_initcall(au1x_pci_setup);