1 /* 2 * Copyright 2001 MontaVista Software Inc. 3 * Author: MontaVista Software, Inc. 4 * stevel@mvista.com or source@mvista.com 5 * 6 * This program is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License as published by the 8 * Free Software Foundation; either version 2 of the License, or (at your 9 * option) any later version. 10 * 11 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 12 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 13 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN 14 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 15 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 16 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 17 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 18 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 19 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 20 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 21 * 22 * You should have received a copy of the GNU General Public License along 23 * with this program; if not, write to the Free Software Foundation, Inc., 24 * 675 Mass Ave, Cambridge, MA 02139, USA. 25 */ 26 27 #include <linux/types.h> 28 #include <linux/pci.h> 29 #include <linux/kernel.h> 30 31 #include <asm/mach-rc32434/rc32434.h> 32 #include <asm/mach-rc32434/irq.h> 33 34 static int irq_map[2][12] = { 35 {0, 0, 2, 3, 2, 3, 0, 0, 0, 0, 0, 1}, 36 {0, 0, 1, 3, 0, 2, 1, 3, 0, 2, 1, 3} 37 }; 38 39 int pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) 40 { 41 int irq = 0; 42 43 if (dev->bus->number < 2 && PCI_SLOT(dev->devfn) < 12) 44 irq = irq_map[dev->bus->number][PCI_SLOT(dev->devfn)]; 45 46 return irq + GROUP4_IRQ_BASE + 4; 47 } 48 49 static void rc32434_pci_early_fixup(struct pci_dev *dev) 50 { 51 if (PCI_SLOT(dev->devfn) == 6 && dev->bus->number == 0) { 52 /* disable prefetched memory range */ 53 pci_write_config_word(dev, PCI_PREF_MEMORY_LIMIT, 0); 54 pci_write_config_word(dev, PCI_PREF_MEMORY_BASE, 0x10); 55 56 pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, 4); 57 } 58 } 59 60 /* 61 * The fixup applies to both the IDT and VIA devices present on the board 62 */ 63 DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, rc32434_pci_early_fixup); 64 65 /* Do platform specific device initialization at pci_enable_device() time */ 66 int pcibios_plat_dev_init(struct pci_dev *dev) 67 { 68 return 0; 69 } 70