patch-2.4.19 linux-2.4.19/arch/mips/jmr3927/rbhma3100/pci_fixup.c

• Lines: 141
• Date: Fri Aug 2 17:39:43 2002
• Orig file: linux-2.4.18/arch/mips/jmr3927/rbhma3100/pci_fixup.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.18/arch/mips/jmr3927/rbhma3100/pci_fixup.c linux-2.4.19/arch/mips/jmr3927/rbhma3100/pci_fixup.c
@@ -0,0 +1,140 @@
+/*
+ *
+ * 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 %02x\n",
+		       dev->bus->number, dev->devfn, irq);
+		dev->irq = irq;
+	}
+}
+#endif