Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * BRIEF MODULE DESCRIPTION |
Sergei Shtylyov | 9cfacb7 | 2007-12-25 21:00:45 +0300 | [diff] [blame] | 3 | * Alchemy/AMD Au1x00 PCI support. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * |
Sergei Shtylyov | c1dcb14 | 2008-04-30 23:18:41 +0400 | [diff] [blame] | 5 | * Copyright 2001-2003, 2007-2008 MontaVista Software Inc. |
| 6 | * Author: MontaVista Software, Inc. <source@mvista.com> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * |
| 8 | * Copyright (C) 2004 by Ralf Baechle (ralf@linux-mips.org) |
| 9 | * |
| 10 | * Support for all devices (greater than 16) added by David Gathright. |
| 11 | * |
| 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. |
| 16 | * |
| 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. |
| 27 | * |
| 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. |
| 31 | */ |
Sergei Shtylyov | ce28f94 | 2008-04-23 22:43:55 +0400 | [diff] [blame] | 32 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #include <linux/pci.h> |
| 34 | #include <linux/kernel.h> |
| 35 | #include <linux/init.h> |
| 36 | |
| 37 | #include <asm/mach-au1x00/au1000.h> |
| 38 | |
| 39 | /* TBD */ |
| 40 | static struct resource pci_io_resource = { |
Sergei Shtylyov | dd99d96 | 2007-12-10 20:28:51 +0300 | [diff] [blame] | 41 | .start = PCI_IO_START, |
| 42 | .end = PCI_IO_END, |
Ralf Baechle | 5e46c3a | 2006-06-04 15:14:05 -0700 | [diff] [blame] | 43 | .name = "PCI IO space", |
| 44 | .flags = IORESOURCE_IO |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | }; |
| 46 | |
| 47 | static struct resource pci_mem_resource = { |
Sergei Shtylyov | dd99d96 | 2007-12-10 20:28:51 +0300 | [diff] [blame] | 48 | .start = PCI_MEM_START, |
| 49 | .end = PCI_MEM_END, |
Ralf Baechle | 5e46c3a | 2006-06-04 15:14:05 -0700 | [diff] [blame] | 50 | .name = "PCI memory space", |
| 51 | .flags = IORESOURCE_MEM |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | }; |
| 53 | |
| 54 | extern struct pci_ops au1x_pci_ops; |
| 55 | |
| 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, |
| 60 | }; |
| 61 | |
| 62 | #if defined(CONFIG_SOC_AU1500) || defined(CONFIG_SOC_AU1550) |
| 63 | static unsigned long virt_io_addr; |
| 64 | #endif |
| 65 | |
| 66 | static int __init au1x_pci_setup(void) |
| 67 | { |
Sergei Shtylyov | 9cfacb7 | 2007-12-25 21:00:45 +0300 | [diff] [blame] | 68 | extern void au1x_pci_cfg_init(void); |
| 69 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | #if defined(CONFIG_SOC_AU1500) || defined(CONFIG_SOC_AU1550) |
Ralf Baechle | 42a3b4f | 2005-09-03 15:56:17 -0700 | [diff] [blame] | 71 | virt_io_addr = (unsigned long)ioremap(Au1500_PCI_IO_START, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | Au1500_PCI_IO_END - Au1500_PCI_IO_START + 1); |
| 73 | |
| 74 | if (!virt_io_addr) { |
| 75 | printk(KERN_ERR "Unable to ioremap pci space\n"); |
| 76 | return 1; |
| 77 | } |
Florian Fainelli | 2da2324 | 2007-09-25 17:07:30 +0200 | [diff] [blame] | 78 | au1x_controller.io_map_base = virt_io_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | |
| 80 | #ifdef CONFIG_DMA_NONCOHERENT |
Ralf Baechle | 786d7cd | 2006-11-07 09:58:30 +0000 | [diff] [blame] | 81 | { |
| 82 | /* |
| 83 | * Set the NC bit in controller for Au1500 pre-AC silicon |
| 84 | */ |
| 85 | u32 prid = read_c0_prid(); |
| 86 | |
| 87 | if ((prid & 0xFF000000) == 0x01000000 && prid < 0x01030202) { |
Sergei Shtylyov | c1dcb14 | 2008-04-30 23:18:41 +0400 | [diff] [blame] | 88 | au_writel((1 << 16) | au_readl(Au1500_PCI_CFG), |
| 89 | Au1500_PCI_CFG); |
| 90 | printk(KERN_INFO "Non-coherent PCI accesses enabled\n"); |
Ralf Baechle | 786d7cd | 2006-11-07 09:58:30 +0000 | [diff] [blame] | 91 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | } |
| 93 | #endif |
| 94 | |
| 95 | set_io_port_base(virt_io_addr); |
| 96 | #endif |
| 97 | |
Sergei Shtylyov | 9cfacb7 | 2007-12-25 21:00:45 +0300 | [diff] [blame] | 98 | au1x_pci_cfg_init(); |
| 99 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | register_pci_controller(&au1x_controller); |
| 101 | return 0; |
| 102 | } |
| 103 | |
| 104 | arch_initcall(au1x_pci_setup); |