2 * BRIEF MODULE DESCRIPTION
3 * Alchemy/AMD Au1x00 PCI support.
5 * Copyright 2001-2003, 2007-2008 MontaVista Software Inc.
6 * Author: MontaVista Software, Inc. <source@mvista.com>
8 * Copyright (C) 2004 by Ralf Baechle (ralf@linux-mips.org)
10 * Support for all devices (greater than 16) added by David Gathright.
12 * This program is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License as published by the
14 * Free Software Foundation; either version 2 of the License, or (at your
15 * option) any later version.
17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
20 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
23 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
24 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 * You should have received a copy of the GNU General Public License along
29 * with this program; if not, write to the Free Software Foundation, Inc.,
30 * 675 Mass Ave, Cambridge, MA 02139, USA.
33 #include <linux/pci.h>
34 #include <linux/kernel.h>
35 #include <linux/init.h>
37 #include <asm/mach-au1x00/au1000.h>
40 static struct resource pci_io_resource = {
41 .start = PCI_IO_START,
43 .name = "PCI IO space",
44 .flags = IORESOURCE_IO
47 static struct resource pci_mem_resource = {
48 .start = PCI_MEM_START,
50 .name = "PCI memory space",
51 .flags = IORESOURCE_MEM
54 extern struct pci_ops au1x_pci_ops;
56 static struct pci_controller au1x_controller = {
57 .pci_ops = &au1x_pci_ops,
58 .io_resource = &pci_io_resource,
59 .mem_resource = &pci_mem_resource,
62 #if defined(CONFIG_SOC_AU1500) || defined(CONFIG_SOC_AU1550)
63 static unsigned long virt_io_addr;
66 static int __init au1x_pci_setup(void)
68 extern void au1x_pci_cfg_init(void);
70 #if defined(CONFIG_SOC_AU1500) || defined(CONFIG_SOC_AU1550)
71 virt_io_addr = (unsigned long)ioremap(Au1500_PCI_IO_START,
72 Au1500_PCI_IO_END - Au1500_PCI_IO_START + 1);
75 printk(KERN_ERR "Unable to ioremap pci space\n");
78 au1x_controller.io_map_base = virt_io_addr;
80 #ifdef CONFIG_DMA_NONCOHERENT
83 * Set the NC bit in controller for Au1500 pre-AC silicon
85 u32 prid = read_c0_prid();
87 if ((prid & 0xFF000000) == 0x01000000 && prid < 0x01030202) {
88 au_writel((1 << 16) | au_readl(Au1500_PCI_CFG),
90 printk(KERN_INFO "Non-coherent PCI accesses enabled\n");
95 set_io_port_base(virt_io_addr);
100 register_pci_controller(&au1x_controller);
104 arch_initcall(au1x_pci_setup);