1/* 2 * linux/arch/arm/mach-footbridge/personal-pci.c 3 * 4 * PCI bios-type initialisation for PCI machines 5 * 6 * Bits taken from various places. 7 */ 8#include <linux/kernel.h> 9#include <linux/pci.h> 10#include <linux/init.h> 11 12#include <asm/irq.h> 13#include <asm/mach/pci.h> 14#include <asm/mach-types.h> 15 16static int irqmap_personal_server[] __initdata = { 17 IRQ_IN0, IRQ_IN1, IRQ_IN2, IRQ_IN3, 0, 0, 0, 18 IRQ_DOORBELLHOST, IRQ_DMA1, IRQ_DMA2, IRQ_PCI 19}; 20 21static int __init personal_server_map_irq(struct pci_dev *dev, u8 slot, u8 pin) 22{ 23 unsigned char line; 24 25 pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &line); 26 27 if (line > 0x40 && line <= 0x5f) { 28 /* line corresponds to the bit controlling this interrupt 29 * in the footbridge. Ignore the first 8 interrupt bits, 30 * look up the rest in the map. IN0 is bit number 8 31 */ 32 return irqmap_personal_server[(line & 0x1f) - 8]; 33 } else if (line == 0) { 34 /* no interrupt */ 35 return 0; 36 } else 37 return irqmap_personal_server[(line - 1) & 3]; 38} 39 40static struct hw_pci personal_server_pci __initdata = { 41 .map_irq = personal_server_map_irq, 42 .nr_controllers = 1, 43 .setup = dc21285_setup, 44 .scan = dc21285_scan_bus, 45 .preinit = dc21285_preinit, 46 .postinit = dc21285_postinit, 47}; 48 49static int __init personal_pci_init(void) 50{ 51 if (machine_is_personal_server()) 52 pci_common_init(&personal_server_pci); 53 return 0; 54} 55 56subsys_initcall(personal_pci_init); 57