1 /* 2 * 3 * BRIEF MODULE DESCRIPTION 4 * Board specific pci fixups for the Toshiba rbtx4927 5 * 6 * Copyright 2001 MontaVista Software Inc. 7 * Author: MontaVista Software, Inc. 8 * ppopov@mvista.com or source@mvista.com 9 * 10 * Copyright (C) 2000-2001 Toshiba Corporation 11 * 12 * Copyright (C) 2004 MontaVista Software Inc. 13 * Author: Manish Lachwani (mlachwani@mvista.com) 14 * 15 * This program is free software; you can redistribute it and/or modify it 16 * under the terms of the GNU General Public License as published by the 17 * Free Software Foundation; either version 2 of the License, or (at your 18 * option) any later version. 19 * 20 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 21 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 22 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN 23 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 26 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 27 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 * 31 * You should have received a copy of the GNU General Public License along 32 * with this program; if not, write to the Free Software Foundation, Inc., 33 * 675 Mass Ave, Cambridge, MA 02139, USA. 34 */ 35 #include <linux/types.h> 36 #include <asm/txx9/pci.h> 37 #include <asm/txx9/rbtx4927.h> 38 39 int rbtx4927_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) 40 { 41 unsigned char irq = pin; 42 43 /* IRQ rotation */ 44 irq--; /* 0-3 */ 45 if (slot == TX4927_PCIC_IDSEL_AD_TO_SLOT(23)) { 46 /* PCI CardSlot (IDSEL=A23) */ 47 /* PCIA => PCIA */ 48 irq = (irq + 0 + slot) % 4; 49 } else { 50 /* PCI Backplane */ 51 if (txx9_pci_option & TXX9_PCI_OPT_PICMG) 52 irq = (irq + 33 - slot) % 4; 53 else 54 irq = (irq + 3 + slot) % 4; 55 } 56 irq++; /* 1-4 */ 57 58 switch (irq) { 59 case 1: 60 irq = RBTX4927_IRQ_IOC_PCIA; 61 break; 62 case 2: 63 irq = RBTX4927_IRQ_IOC_PCIB; 64 break; 65 case 3: 66 irq = RBTX4927_IRQ_IOC_PCIC; 67 break; 68 case 4: 69 irq = RBTX4927_IRQ_IOC_PCID; 70 break; 71 } 72 return irq; 73 } 74