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/txx9/tx4927.h> 41 42 #undef DEBUG 43 #ifdef DEBUG 44 #define DBG(x...) printk(x) 45 #else 46 #define DBG(x...) 47 #endif 48 49 /* look up table for backplane pci irq for slots 17-20 by pin # */ 50 static unsigned char backplane_pci_irq[4][4] = { 51 /* PJ6 SLOT: 17, PIN: 1 */ {TX4927_IRQ_IOC_PCIA, 52 /* PJ6 SLOT: 17, PIN: 2 */ 53 TX4927_IRQ_IOC_PCIB, 54 /* PJ6 SLOT: 17, PIN: 3 */ 55 TX4927_IRQ_IOC_PCIC, 56 /* PJ6 SLOT: 17, PIN: 4 */ 57 TX4927_IRQ_IOC_PCID}, 58 /* SB SLOT: 18, PIN: 1 */ {TX4927_IRQ_IOC_PCIB, 59 /* SB SLOT: 18, PIN: 2 */ 60 TX4927_IRQ_IOC_PCIC, 61 /* SB SLOT: 18, PIN: 3 */ 62 TX4927_IRQ_IOC_PCID, 63 /* SB SLOT: 18, PIN: 4 */ 64 TX4927_IRQ_IOC_PCIA}, 65 /* PJ5 SLOT: 19, PIN: 1 */ {TX4927_IRQ_IOC_PCIC, 66 /* PJ5 SLOT: 19, PIN: 2 */ 67 TX4927_IRQ_IOC_PCID, 68 /* PJ5 SLOT: 19, PIN: 3 */ 69 TX4927_IRQ_IOC_PCIA, 70 /* PJ5 SLOT: 19, PIN: 4 */ 71 TX4927_IRQ_IOC_PCIB}, 72 /* PJ4 SLOT: 20, PIN: 1 */ {TX4927_IRQ_IOC_PCID, 73 /* PJ4 SLOT: 20, PIN: 2 */ 74 TX4927_IRQ_IOC_PCIA, 75 /* PJ4 SLOT: 20, PIN: 3 */ 76 TX4927_IRQ_IOC_PCIB, 77 /* PJ4 SLOT: 20, PIN: 4 */ 78 TX4927_IRQ_IOC_PCIC} 79 }; 80 81 static int pci_get_irq(const struct pci_dev *dev, int pin) 82 { 83 unsigned char irq = pin; 84 85 DBG("pci_get_irq: pin is %d\n", pin); 86 /* IRQ rotation */ 87 irq--; /* 0-3 */ 88 if (dev->bus->parent == NULL && 89 PCI_SLOT(dev->devfn) == TX4927_PCIC_IDSEL_AD_TO_SLOT(23)) { 90 printk("Onboard PCI_SLOT(dev->devfn) is %d\n", 91 PCI_SLOT(dev->devfn)); 92 /* IDSEL=A23 is tx4927 onboard pci slot */ 93 irq = (irq + PCI_SLOT(dev->devfn)) % 4; 94 irq++; /* 1-4 */ 95 DBG("irq is now %d\n", irq); 96 97 switch (irq) { 98 case 1: 99 irq = TX4927_IRQ_IOC_PCIA; 100 break; 101 case 2: 102 irq = TX4927_IRQ_IOC_PCIB; 103 break; 104 case 3: 105 irq = TX4927_IRQ_IOC_PCIC; 106 break; 107 case 4: 108 irq = TX4927_IRQ_IOC_PCID; 109 break; 110 } 111 } else { 112 /* PCI Backplane */ 113 DBG("PCI Backplane PCI_SLOT(dev->devfn) is %d\n", 114 PCI_SLOT(dev->devfn)); 115 irq = backplane_pci_irq[PCI_SLOT(dev->devfn) - 17][irq]; 116 } 117 DBG("assigned irq %d\n", irq); 118 return irq; 119 } 120 121 int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) 122 { 123 unsigned char irq; 124 125 printk("PCI Setup for pin %d \n", pin); 126 127 if (dev->device == 0x9130) /* IDE */ 128 irq = 14; 129 else 130 irq = pci_get_irq(dev, pin); 131 132 return irq; 133 } 134 135 /* Do platform specific device initialization at pci_enable_device() time */ 136 int pcibios_plat_dev_init(struct pci_dev *dev) 137 { 138 return 0; 139 } 140