1 /* 2 * arch/ppc64/kernel/pSeries_pci.c 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 * 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 24 #include <linux/init.h> 25 #include <linux/ioport.h> 26 #include <linux/kernel.h> 27 #include <linux/pci.h> 28 #include <linux/string.h> 29 30 #include <asm/pci-bridge.h> 31 #include <asm/prom.h> 32 #include <asm/ppc-pci.h> 33 34 static int __devinitdata s7a_workaround = -1; 35 36 #if 0 37 void pcibios_name_device(struct pci_dev *dev) 38 { 39 struct device_node *dn; 40 41 /* 42 * Add IBM loc code (slot) as a prefix to the device names for service 43 */ 44 dn = pci_device_to_OF_node(dev); 45 if (dn) { 46 char *loc_code = get_property(dn, "ibm,loc-code", 0); 47 if (loc_code) { 48 int loc_len = strlen(loc_code); 49 if (loc_len < sizeof(dev->dev.name)) { 50 memmove(dev->dev.name+loc_len+1, dev->dev.name, 51 sizeof(dev->dev.name)-loc_len-1); 52 memcpy(dev->dev.name, loc_code, loc_len); 53 dev->dev.name[loc_len] = ' '; 54 dev->dev.name[sizeof(dev->dev.name)-1] = '\0'; 55 } 56 } 57 } 58 } 59 DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, pcibios_name_device); 60 #endif 61 62 static void __devinit check_s7a(void) 63 { 64 struct device_node *root; 65 char *model; 66 67 s7a_workaround = 0; 68 root = of_find_node_by_path("/"); 69 if (root) { 70 model = get_property(root, "model", NULL); 71 if (model && !strcmp(model, "IBM,7013-S7A")) 72 s7a_workaround = 1; 73 of_node_put(root); 74 } 75 } 76 77 void __devinit pSeries_irq_bus_setup(struct pci_bus *bus) 78 { 79 struct pci_dev *dev; 80 81 if (s7a_workaround < 0) 82 check_s7a(); 83 list_for_each_entry(dev, &bus->devices, bus_list) { 84 pci_read_irq_line(dev); 85 if (s7a_workaround) { 86 if (dev->irq > 16) { 87 dev->irq -= 3; 88 pci_write_config_byte(dev, PCI_INTERRUPT_LINE, 89 dev->irq); 90 } 91 } 92 } 93 } 94 95 static void __init pSeries_request_regions(void) 96 { 97 if (!isa_io_base) 98 return; 99 100 request_region(0x20,0x20,"pic1"); 101 request_region(0xa0,0x20,"pic2"); 102 request_region(0x00,0x20,"dma1"); 103 request_region(0x40,0x20,"timer"); 104 request_region(0x80,0x10,"dma page reg"); 105 request_region(0xc0,0x20,"dma2"); 106 } 107 108 void __init pSeries_final_fixup(void) 109 { 110 pSeries_request_regions(); 111 112 pci_addr_cache_build(); 113 } 114 115 /* 116 * Assume the winbond 82c105 is the IDE controller on a 117 * p610. We should probably be more careful in case 118 * someone tries to plug in a similar adapter. 119 */ 120 static void fixup_winbond_82c105(struct pci_dev* dev) 121 { 122 int i; 123 unsigned int reg; 124 125 if (!platform_is_pseries()) 126 return; 127 128 printk("Using INTC for W82c105 IDE controller.\n"); 129 pci_read_config_dword(dev, 0x40, ®); 130 /* Enable LEGIRQ to use INTC instead of ISA interrupts */ 131 pci_write_config_dword(dev, 0x40, reg | (1<<11)); 132 133 for (i = 0; i < DEVICE_COUNT_RESOURCE; ++i) { 134 /* zap the 2nd function of the winbond chip */ 135 if (dev->resource[i].flags & IORESOURCE_IO 136 && dev->bus->number == 0 && dev->devfn == 0x81) 137 dev->resource[i].flags &= ~IORESOURCE_IO; 138 } 139 } 140 DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_WINBOND, PCI_DEVICE_ID_WINBOND_82C105, 141 fixup_winbond_82c105); 142