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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 | /* * * BRIEF MODULE DESCRIPTION * Board specific pci fixups for the Toshiba rbtx4927 * * Copyright 2001 MontaVista Software Inc. * Author: MontaVista Software, Inc. * ppopov@mvista.com or source@mvista.com * * Copyright (C) 2000-2001 Toshiba Corporation * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 675 Mass Ave, Cambridge, MA 02139, USA. */ #include <linux/types.h> #include <linux/pci.h> #include <linux/kernel.h> #include <linux/init.h> #include <asm/tx4927/tx4927.h> #include <asm/tx4927/tx4927_pci.h> #undef DEBUG #ifdef DEBUG #define DBG(x...) printk(x) #else #define DBG(x...) #endif /* look up table for backplane pci irq for slots 17-20 by pin # */ static unsigned char backplane_pci_irq[4][4] = { /* PJ6 SLOT: 17, PIN: 1 */ {TX4927_IRQ_IOC_PCIA, /* PJ6 SLOT: 17, PIN: 2 */ TX4927_IRQ_IOC_PCIB, /* PJ6 SLOT: 17, PIN: 3 */ TX4927_IRQ_IOC_PCIC, /* PJ6 SLOT: 17, PIN: 4 */ TX4927_IRQ_IOC_PCID}, /* SB SLOT: 18, PIN: 1 */ {TX4927_IRQ_IOC_PCIB, /* SB SLOT: 18, PIN: 2 */ TX4927_IRQ_IOC_PCIC, /* SB SLOT: 18, PIN: 3 */ TX4927_IRQ_IOC_PCID, /* SB SLOT: 18, PIN: 4 */ TX4927_IRQ_IOC_PCIA}, /* PJ5 SLOT: 19, PIN: 1 */ {TX4927_IRQ_IOC_PCIC, /* PJ5 SLOT: 19, PIN: 2 */ TX4927_IRQ_IOC_PCID, /* PJ5 SLOT: 19, PIN: 3 */ TX4927_IRQ_IOC_PCIA, /* PJ5 SLOT: 19, PIN: 4 */ TX4927_IRQ_IOC_PCIB}, /* PJ4 SLOT: 20, PIN: 1 */ {TX4927_IRQ_IOC_PCID, /* PJ4 SLOT: 20, PIN: 2 */ TX4927_IRQ_IOC_PCIA, /* PJ4 SLOT: 20, PIN: 3 */ TX4927_IRQ_IOC_PCIB, /* PJ4 SLOT: 20, PIN: 4 */ TX4927_IRQ_IOC_PCIC} }; int pci_get_irq(struct pci_dev *dev, int pin) { unsigned char irq = pin; DBG("pci_get_irq: pin is %d\n", pin); /* IRQ rotation */ irq--; /* 0-3 */ if (dev->bus->parent == NULL && PCI_SLOT(dev->devfn) == TX4927_PCIC_IDSEL_AD_TO_SLOT(23)) { printk("Onboard PCI_SLOT(dev->devfn) is %d\n", PCI_SLOT(dev->devfn)); /* IDSEL=A23 is tx4927 onboard pci slot */ irq = (irq + PCI_SLOT(dev->devfn)) % 4; irq++; /* 1-4 */ DBG("irq is now %d\n", irq); switch (irq) { case 1: irq = TX4927_IRQ_IOC_PCIA; break; case 2: irq = TX4927_IRQ_IOC_PCIB; break; case 3: irq = TX4927_IRQ_IOC_PCIC; break; case 4: irq = TX4927_IRQ_IOC_PCID; break; } } else { /* PCI Backplane */ DBG("PCI Backplane PCI_SLOT(dev->devfn) is %d\n", PCI_SLOT(dev->devfn)); irq = backplane_pci_irq[PCI_SLOT(dev->devfn) - 17][irq]; } DBG("assigned irq %d\n", irq); return irq; } #ifdef TX4927_SUPPORT_PCI_66 extern int tx4927_pci66; extern void tx4927_pci66_setup(void); #endif extern void tx4927_pci_setup(void); #ifdef TX4927_SUPPORT_PCI_66 int tx4927_pci66_check(void) { struct pci_dev *dev; unsigned short stat; int cap66 = 1; if (tx4927_pci66 < 0) return 0; /* check 66MHz capability */ pci_for_each_dev(dev) { if (cap66) { pci_read_config_word(dev, PCI_STATUS, &stat); if (!(stat & PCI_STATUS_66MHZ)) { printk(KERN_INFO "PCI: %02x:%02x not 66MHz capable.\n", dev->bus->number, dev->devfn); cap66 = 0; } } } return cap66; } #endif void __init pcibios_fixup_irqs(void) { unsigned char pin; unsigned char irq; struct pci_dev *dev; unsigned int id; #ifdef TX4927_SUPPORT_PCI_66 if (tx4927_pci66_check()) { tx4927_pci66_setup(); tx4927_pci_setup(); /* Reinitialize PCIC */ } #endif pci_for_each_dev(dev) { DBG("FIXUP:\n"); DBG(" devfn=0x%02x (0x%02x:0x%02x)\n", dev->devfn, PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn)); pci_read_config_dword(dev, PCI_VENDOR_ID, &id); DBG(" id=0x%08x\n", id); pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &irq); DBG(" line=0x%02x/%d\n", irq, irq); pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin); DBG(" pin=%d\n", pin); #ifdef DEBUG { unsigned int tmp; pci_read_config_dword(dev, 0x10, &tmp); DBG(" bar0:0x10=0x%08x\n", tmp); pci_read_config_dword(dev, 0x14, &tmp); DBG(" bar1:0x14=0x%08x\n", tmp); pci_read_config_dword(dev, 0x1c, &tmp); DBG(" bar2:0x1c=0x%08x\n", tmp); pci_read_config_dword(dev, 0x20, &tmp); DBG(" bar3:0x20=0x%08x\n", tmp); pci_read_config_dword(dev, 0x24, &tmp); DBG(" bar4:0x24=0x%08x\n", tmp); } #endif irq = 0; if (id == 0x91301055) { /* ide */ irq = 14; } if (pin == 0) { DBG(" auto irq (now=%d) -- skipping pin=0\n", irq); } else if (irq) { DBG(" auto irq (now=%d) -- skipping hardcoded irq\n", irq); } else { DBG(" auto irq (was=%d)\n", irq); irq = pci_get_irq(dev, pin); pci_write_config_byte(dev, PCI_INTERRUPT_LINE, irq); dev->irq = irq; DBG(" auto irq (now=%d)\n", irq); } pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &irq); printk(KERN_INFO "PCI: 0x%02x:0x%02x(0x%02x,0x%02x) IRQ=%d\n", dev->bus->number, dev->devfn, PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn), irq); } } |