Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 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 <linux/pci.h> |
| 37 | #include <linux/kernel.h> |
| 38 | #include <linux/init.h> |
| 39 | |
| 40 | #include <asm/tx4927/tx4927.h> |
| 41 | #include <asm/tx4927/tx4927_pci.h> |
| 42 | |
| 43 | #undef DEBUG |
| 44 | #ifdef DEBUG |
| 45 | #define DBG(x...) printk(x) |
| 46 | #else |
| 47 | #define DBG(x...) |
| 48 | #endif |
| 49 | |
| 50 | /* look up table for backplane pci irq for slots 17-20 by pin # */ |
| 51 | static unsigned char backplane_pci_irq[4][4] = { |
| 52 | /* PJ6 SLOT: 17, PIN: 1 */ {TX4927_IRQ_IOC_PCIA, |
| 53 | /* PJ6 SLOT: 17, PIN: 2 */ |
| 54 | TX4927_IRQ_IOC_PCIB, |
| 55 | /* PJ6 SLOT: 17, PIN: 3 */ |
| 56 | TX4927_IRQ_IOC_PCIC, |
| 57 | /* PJ6 SLOT: 17, PIN: 4 */ |
| 58 | TX4927_IRQ_IOC_PCID}, |
| 59 | /* SB SLOT: 18, PIN: 1 */ {TX4927_IRQ_IOC_PCIB, |
| 60 | /* SB SLOT: 18, PIN: 2 */ |
| 61 | TX4927_IRQ_IOC_PCIC, |
| 62 | /* SB SLOT: 18, PIN: 3 */ |
| 63 | TX4927_IRQ_IOC_PCID, |
| 64 | /* SB SLOT: 18, PIN: 4 */ |
| 65 | TX4927_IRQ_IOC_PCIA}, |
| 66 | /* PJ5 SLOT: 19, PIN: 1 */ {TX4927_IRQ_IOC_PCIC, |
| 67 | /* PJ5 SLOT: 19, PIN: 2 */ |
| 68 | TX4927_IRQ_IOC_PCID, |
| 69 | /* PJ5 SLOT: 19, PIN: 3 */ |
| 70 | TX4927_IRQ_IOC_PCIA, |
| 71 | /* PJ5 SLOT: 19, PIN: 4 */ |
| 72 | TX4927_IRQ_IOC_PCIB}, |
| 73 | /* PJ4 SLOT: 20, PIN: 1 */ {TX4927_IRQ_IOC_PCID, |
| 74 | /* PJ4 SLOT: 20, PIN: 2 */ |
| 75 | TX4927_IRQ_IOC_PCIA, |
| 76 | /* PJ4 SLOT: 20, PIN: 3 */ |
| 77 | TX4927_IRQ_IOC_PCIB, |
| 78 | /* PJ4 SLOT: 20, PIN: 4 */ |
| 79 | TX4927_IRQ_IOC_PCIC} |
| 80 | }; |
| 81 | |
| 82 | int pci_get_irq(struct pci_dev *dev, int pin) |
| 83 | { |
| 84 | unsigned char irq = pin; |
| 85 | |
| 86 | DBG("pci_get_irq: pin is %d\n", pin); |
| 87 | /* IRQ rotation */ |
| 88 | irq--; /* 0-3 */ |
| 89 | if (dev->bus->parent == NULL && |
| 90 | PCI_SLOT(dev->devfn) == TX4927_PCIC_IDSEL_AD_TO_SLOT(23)) { |
| 91 | printk("Onboard PCI_SLOT(dev->devfn) is %d\n", |
| 92 | PCI_SLOT(dev->devfn)); |
| 93 | /* IDSEL=A23 is tx4927 onboard pci slot */ |
| 94 | irq = (irq + PCI_SLOT(dev->devfn)) % 4; |
| 95 | irq++; /* 1-4 */ |
| 96 | DBG("irq is now %d\n", irq); |
| 97 | |
| 98 | switch (irq) { |
| 99 | case 1: |
| 100 | irq = TX4927_IRQ_IOC_PCIA; |
| 101 | break; |
| 102 | case 2: |
| 103 | irq = TX4927_IRQ_IOC_PCIB; |
| 104 | break; |
| 105 | case 3: |
| 106 | irq = TX4927_IRQ_IOC_PCIC; |
| 107 | break; |
| 108 | case 4: |
| 109 | irq = TX4927_IRQ_IOC_PCID; |
| 110 | break; |
| 111 | } |
| 112 | } else { |
| 113 | /* PCI Backplane */ |
| 114 | DBG("PCI Backplane PCI_SLOT(dev->devfn) is %d\n", |
| 115 | PCI_SLOT(dev->devfn)); |
| 116 | irq = backplane_pci_irq[PCI_SLOT(dev->devfn) - 17][irq]; |
| 117 | } |
| 118 | DBG("assigned irq %d\n", irq); |
| 119 | return irq; |
| 120 | } |
| 121 | |
| 122 | int __init pcibios_map_irq(struct pci_dev *dev, u8 slot, u8 pin) |
| 123 | { |
| 124 | unsigned char irq; |
| 125 | |
| 126 | printk("PCI Setup for pin %d \n", pin); |
| 127 | |
| 128 | if (dev->device == 0x9130) /* IDE */ |
| 129 | irq = 14; |
| 130 | else |
| 131 | irq = pci_get_irq(dev, pin); |
| 132 | |
| 133 | return irq; |
| 134 | } |
| 135 | |
| 136 | /* Do platform specific device initialization at pci_enable_device() time */ |
| 137 | int pcibios_plat_dev_init(struct pci_dev *dev) |
| 138 | { |
| 139 | return 0; |
| 140 | } |