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Diffstat (limited to 'arch/mips/alchemy/common/pci.c')
| -rw-r--r-- | arch/mips/alchemy/common/pci.c | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/arch/mips/alchemy/common/pci.c b/arch/mips/alchemy/common/pci.c new file mode 100644 index 0000000..7866cf5 --- /dev/null +++ b/arch/mips/alchemy/common/pci.c @@ -0,0 +1,104 @@ +/* + * BRIEF MODULE DESCRIPTION + * Alchemy/AMD Au1x00 PCI support. + * + * Copyright 2001-2003, 2007-2008 MontaVista Software Inc. + * Author: MontaVista Software, Inc. <source@mvista.com> + * + * Copyright (C) 2004 by Ralf Baechle (ralf@linux-mips.org) + * + * Support for all devices (greater than 16) added by David Gathright. + * + * 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. + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN + * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF + * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON + * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include <linux/pci.h> +#include <linux/kernel.h> +#include <linux/init.h> + +#include <asm/mach-au1x00/au1000.h> + +/* TBD */ +static struct resource pci_io_resource = { + .start = PCI_IO_START, + .end = PCI_IO_END, + .name = "PCI IO space", + .flags = IORESOURCE_IO +}; + +static struct resource pci_mem_resource = { + .start = PCI_MEM_START, + .end = PCI_MEM_END, + .name = "PCI memory space", + .flags = IORESOURCE_MEM +}; + +extern struct pci_ops au1x_pci_ops; + +static struct pci_controller au1x_controller = { + .pci_ops = &au1x_pci_ops, + .io_resource = &pci_io_resource, + .mem_resource = &pci_mem_resource, +}; + +#if defined(CONFIG_SOC_AU1500) || defined(CONFIG_SOC_AU1550) +static unsigned long virt_io_addr; +#endif + +static int __init au1x_pci_setup(void) +{ + extern void au1x_pci_cfg_init(void); + +#if defined(CONFIG_SOC_AU1500) || defined(CONFIG_SOC_AU1550) + virt_io_addr = (unsigned long)ioremap(Au1500_PCI_IO_START, + Au1500_PCI_IO_END - Au1500_PCI_IO_START + 1); + + if (!virt_io_addr) { + printk(KERN_ERR "Unable to ioremap pci space\n"); + return 1; + } + au1x_controller.io_map_base = virt_io_addr; + +#ifdef CONFIG_DMA_NONCOHERENT + { + /* + * Set the NC bit in controller for Au1500 pre-AC silicon + */ + u32 prid = read_c0_prid(); + + if ((prid & 0xFF000000) == 0x01000000 && prid < 0x01030202) { + au_writel((1 << 16) | au_readl(Au1500_PCI_CFG), + Au1500_PCI_CFG); + printk(KERN_INFO "Non-coherent PCI accesses enabled\n"); + } + } +#endif + + set_io_port_base(virt_io_addr); +#endif + + au1x_pci_cfg_init(); + + register_pci_controller(&au1x_controller); + return 0; +} + +arch_initcall(au1x_pci_setup); |