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 static int pci_get_irq(const 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(const 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 } 141