1/* 2 * Toshiba rbtx4938 pci routines 3 * Copyright (C) 2000-2001 Toshiba Corporation 4 * 5 * 2003-2005 (c) MontaVista Software, Inc. This file is licensed under the 6 * terms of the GNU General Public License version 2. This program is 7 * licensed "as is" without any warranty of any kind, whether express 8 * or implied. 9 * 10 * Support for TX4938 in 2.6 - Manish Lachwani (mlachwani@mvista.com) 11 */ 12#include <linux/types.h> 13#include <linux/pci.h> 14#include <linux/kernel.h> 15#include <linux/init.h> 16 17#include <asm/tx4938/rbtx4938.h> 18 19extern struct pci_controller tx4938_pci_controller[]; 20 21int pci_get_irq(struct pci_dev *dev, int pin) 22{ 23 int irq = pin; 24 u8 slot = PCI_SLOT(dev->devfn); 25 struct pci_controller *controller = (struct pci_controller *)dev->sysdata; 26 27 if (controller == &tx4938_pci_controller[1]) { 28 /* TX4938 PCIC1 */ 29 switch (slot) { 30 case TX4938_PCIC_IDSEL_AD_TO_SLOT(31): 31 if (tx4938_ccfgptr->pcfg & TX4938_PCFG_ETH0_SEL) 32 return RBTX4938_IRQ_IRC + TX4938_IR_ETH0; 33 break; 34 case TX4938_PCIC_IDSEL_AD_TO_SLOT(30): 35 if (tx4938_ccfgptr->pcfg & TX4938_PCFG_ETH1_SEL) 36 return RBTX4938_IRQ_IRC + TX4938_IR_ETH1; 37 break; 38 } 39 return 0; 40 } 41 42 /* IRQ rotation */ 43 irq--; /* 0-3 */ 44 if (dev->bus->parent == NULL && 45 (slot == TX4938_PCIC_IDSEL_AD_TO_SLOT(23))) { 46 /* PCI CardSlot (IDSEL=A23) */ 47 /* PCIA => PCIA (IDSEL=A23) */ 48 irq = (irq + 0 + slot) % 4; 49 } else { 50 /* PCI Backplane */ 51 irq = (irq + 33 - slot) % 4; 52 } 53 irq++; /* 1-4 */ 54 55 switch (irq) { 56 case 1: 57 irq = RBTX4938_IRQ_IOC_PCIA; 58 break; 59 case 2: 60 irq = RBTX4938_IRQ_IOC_PCIB; 61 break; 62 case 3: 63 irq = RBTX4938_IRQ_IOC_PCIC; 64 break; 65 case 4: 66 irq = RBTX4938_IRQ_IOC_PCID; 67 break; 68 } 69 return irq; 70} 71 72int __init pcibios_map_irq(struct pci_dev *dev, u8 slot, u8 pin) 73{ 74 unsigned char irq = 0; 75 76 irq = pci_get_irq(dev, pin); 77 78 printk(KERN_INFO "PCI: 0x%02x:0x%02x(0x%02x,0x%02x) IRQ=%d\n", 79 dev->bus->number, dev->devfn, PCI_SLOT(dev->devfn), 80 PCI_FUNC(dev->devfn), irq); 81 82 return irq; 83} 84 85/* 86 * Do platform specific device initialization at pci_enable_device() time 87 */ 88int pcibios_plat_dev_init(struct pci_dev *dev) 89{ 90 return 0; 91} 92