Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Arnd Bergmann | c5a3c2e | 2005-06-23 09:43:23 +1000 | [diff] [blame] | 2 | * arch/ppc64/kernel/pSeries_pci.c |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * |
| 4 | * Copyright (C) 2001 Dave Engebretsen, IBM Corporation |
| 5 | * Copyright (C) 2003 Anton Blanchard <anton@au.ibm.com>, IBM |
| 6 | * |
| 7 | * pSeries specific routines for PCI. |
| 8 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | * GNU General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, write to the Free Software |
| 21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 22 | */ |
| 23 | |
Arnd Bergmann | c5a3c2e | 2005-06-23 09:43:23 +1000 | [diff] [blame] | 24 | #include <linux/init.h> |
| 25 | #include <linux/ioport.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include <linux/pci.h> |
| 28 | #include <linux/string.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include <asm/pci-bridge.h> |
Arnd Bergmann | c5a3c2e | 2005-06-23 09:43:23 +1000 | [diff] [blame] | 31 | #include <asm/prom.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #include "pci.h" |
| 34 | |
John Rose | dad32bb | 2005-06-23 17:09:54 +1000 | [diff] [blame] | 35 | static int __initdata s7a_workaround = -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | |
| 37 | #if 0 |
| 38 | void pcibios_name_device(struct pci_dev *dev) |
| 39 | { |
| 40 | struct device_node *dn; |
| 41 | |
| 42 | /* |
| 43 | * Add IBM loc code (slot) as a prefix to the device names for service |
| 44 | */ |
| 45 | dn = pci_device_to_OF_node(dev); |
| 46 | if (dn) { |
| 47 | char *loc_code = get_property(dn, "ibm,loc-code", 0); |
| 48 | if (loc_code) { |
| 49 | int loc_len = strlen(loc_code); |
| 50 | if (loc_len < sizeof(dev->dev.name)) { |
| 51 | memmove(dev->dev.name+loc_len+1, dev->dev.name, |
| 52 | sizeof(dev->dev.name)-loc_len-1); |
| 53 | memcpy(dev->dev.name, loc_code, loc_len); |
| 54 | dev->dev.name[loc_len] = ' '; |
| 55 | dev->dev.name[sizeof(dev->dev.name)-1] = '\0'; |
| 56 | } |
| 57 | } |
| 58 | } |
| 59 | } |
| 60 | DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, pcibios_name_device); |
| 61 | #endif |
| 62 | |
Arnd Bergmann | c5a3c2e | 2005-06-23 09:43:23 +1000 | [diff] [blame] | 63 | static void __init check_s7a(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | { |
| 65 | struct device_node *root; |
| 66 | char *model; |
| 67 | |
John Rose | dad32bb | 2005-06-23 17:09:54 +1000 | [diff] [blame] | 68 | s7a_workaround = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | root = of_find_node_by_path("/"); |
| 70 | if (root) { |
| 71 | model = get_property(root, "model", NULL); |
| 72 | if (model && !strcmp(model, "IBM,7013-S7A")) |
| 73 | s7a_workaround = 1; |
| 74 | of_node_put(root); |
| 75 | } |
| 76 | } |
| 77 | |
John Rose | dad32bb | 2005-06-23 17:09:54 +1000 | [diff] [blame] | 78 | void __devinit pSeries_irq_bus_setup(struct pci_bus *bus) |
| 79 | { |
| 80 | struct pci_dev *dev; |
| 81 | |
| 82 | if (s7a_workaround < 0) |
| 83 | check_s7a(); |
| 84 | list_for_each_entry(dev, &bus->devices, bus_list) { |
| 85 | pci_read_irq_line(dev); |
| 86 | if (s7a_workaround) { |
| 87 | if (dev->irq > 16) { |
| 88 | dev->irq -= 3; |
| 89 | pci_write_config_byte(dev, PCI_INTERRUPT_LINE, |
| 90 | dev->irq); |
| 91 | } |
| 92 | } |
| 93 | } |
| 94 | } |
| 95 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | static void __init pSeries_request_regions(void) |
| 97 | { |
| 98 | if (!isa_io_base) |
| 99 | return; |
| 100 | |
| 101 | request_region(0x20,0x20,"pic1"); |
| 102 | request_region(0xa0,0x20,"pic2"); |
| 103 | request_region(0x00,0x20,"dma1"); |
| 104 | request_region(0x40,0x20,"timer"); |
| 105 | request_region(0x80,0x10,"dma page reg"); |
| 106 | request_region(0xc0,0x20,"dma2"); |
| 107 | } |
| 108 | |
| 109 | void __init pSeries_final_fixup(void) |
| 110 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | phbs_remap_io(); |
| 112 | pSeries_request_regions(); |
| 113 | |
| 114 | pci_addr_cache_build(); |
| 115 | } |
| 116 | |
| 117 | /* |
| 118 | * Assume the winbond 82c105 is the IDE controller on a |
| 119 | * p610. We should probably be more careful in case |
| 120 | * someone tries to plug in a similar adapter. |
| 121 | */ |
| 122 | static void fixup_winbond_82c105(struct pci_dev* dev) |
| 123 | { |
| 124 | int i; |
| 125 | unsigned int reg; |
| 126 | |
| 127 | if (!(systemcfg->platform & PLATFORM_PSERIES)) |
| 128 | return; |
| 129 | |
| 130 | printk("Using INTC for W82c105 IDE controller.\n"); |
| 131 | pci_read_config_dword(dev, 0x40, ®); |
| 132 | /* Enable LEGIRQ to use INTC instead of ISA interrupts */ |
| 133 | pci_write_config_dword(dev, 0x40, reg | (1<<11)); |
| 134 | |
| 135 | for (i = 0; i < DEVICE_COUNT_RESOURCE; ++i) { |
| 136 | /* zap the 2nd function of the winbond chip */ |
| 137 | if (dev->resource[i].flags & IORESOURCE_IO |
| 138 | && dev->bus->number == 0 && dev->devfn == 0x81) |
| 139 | dev->resource[i].flags &= ~IORESOURCE_IO; |
| 140 | } |
| 141 | } |
| 142 | DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_WINBOND, PCI_DEVICE_ID_WINBOND_82C105, |
| 143 | fixup_winbond_82c105); |