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