pci_fixup.c
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:4k
- /*
- *
- * BRIEF MODULE DESCRIPTION
- * Board specific pci fixups.
- *
- * Copyright 2001 MontaVista Software Inc.
- * Author: MontaVista Software, Inc.
- * ppopov@mvista.com or source@mvista.com
- *
- * 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/config.h>
- #ifdef CONFIG_PCI
- #include <linux/types.h>
- #include <linux/pci.h>
- #include <linux/kernel.h>
- #include <linux/init.h>
- #include <asm/jmr3927/jmr3927.h>
- #undef DEBUG
- #ifdef DEBUG
- #define DBG(x...) printk(x)
- #else
- #define DBG(x...)
- #endif
- void __init pcibios_fixup_resources(struct pci_dev *dev)
- {
- /* will need to fixup IO resources */
- }
- void __init pcibios_fixup(void)
- {
- /* nothing to do here */
- }
- int pci_get_irq(struct pci_dev *dev, int pin)
- {
- unsigned char irq = pin;
- /* IRQ rotation (PICMG) */
- irq--; /* 0-3 */
- if (dev->bus->parent == NULL &&
- PCI_SLOT(dev->devfn) == TX3927_PCIC_IDSEL_AD_TO_SLOT(23)) {
- /* PCI CardSlot (IDSEL=A23, DevNu=12) */
- /* PCIA => PCIC (IDSEL=A23) */
- /* NOTE: JMR3927 JP1 must be set to OPEN */
- irq = (irq + 2) % 4;
- } else if (dev->bus->parent == NULL &&
- PCI_SLOT(dev->devfn) == TX3927_PCIC_IDSEL_AD_TO_SLOT(22)) {
- /* PCI CardSlot (IDSEL=A22, DevNu=11) */
- /* PCIA => PCIA (IDSEL=A22) */
- /* NOTE: JMR3927 JP1 must be set to OPEN */
- irq = (irq + 0) % 4;
- } else {
- /* PCI Backplane */
- irq = (irq + 3 + PCI_SLOT(dev->devfn)) % 4;
- #if 0 /* ??? */
- for (bus = dev->bus; bus->parent != NULL; bus = bus->parent) {
- irq = (irq + 3 + PCI_SLOT(bus->self->devfn)) % 4;
- }
- #endif
- }
- irq++; /* 1-4 */
- switch (irq) {
- case 1:
- irq = JMR3927_IRQ_IOC_PCIA;
- break;
- case 2:
- // wrong for backplane irq = JMR3927_IRQ_IOC_PCIB;
- irq = JMR3927_IRQ_IOC_PCID;
- break;
- case 3:
- irq = JMR3927_IRQ_IOC_PCIC;
- break;
- case 4:
- // wrong for backplane irq = JMR3927_IRQ_IOC_PCID;
- irq = JMR3927_IRQ_IOC_PCIB;
- break;
- }
- /* Check OnBoard Ethernet (IDSEL=A24, DevNu=13) */
- if (dev->bus->parent == NULL &&
- PCI_SLOT(dev->devfn) == TX3927_PCIC_IDSEL_AD_TO_SLOT(24)) {
- extern int jmr3927_ether1_irq;
- /* check this irq line was reserved for ether1 */
- if (jmr3927_ether1_irq != JMR3927_IRQ_ETHER0)
- irq = JMR3927_IRQ_ETHER0;
- else
- irq = 0; /* disable */
- }
- return irq;
- }
- void __init pcibios_fixup_irqs(void)
- {
- unsigned char irq;
- struct pci_dev *dev;
- pci_for_each_dev(dev) {
- pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &irq);
- if (irq == 0)
- return;
- /* SMSC SLC90E66 IDE uses irq 14, 15 (default) */
- if (!(dev->vendor == PCI_VENDOR_ID_EFAR &&
- dev->device == PCI_DEVICE_ID_EFAR_SLC90E66_1)) {
- irq = pci_get_irq(dev, irq);
- pci_write_config_byte(dev, PCI_INTERRUPT_LINE, irq);
- }
- pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &irq);
- printk(KERN_INFO "PCI: %02x:%02x IRQ %02xn",
- dev->bus->number, dev->devfn, irq);
- dev->irq = irq;
- }
- }
- #endif