1 files changed, 53 insertions, 27 deletions

diff --git a/arch/mips/pci/ops-tx3927.c b/arch/mips/pci/ops-tx3927.c
index 8a17a39e5bf2..31c150196595 100644
--- a/arch/mips/pci/ops-tx3927.c
+++ b/arch/mips/pci/ops-tx3927.c
@@ -37,45 +37,48 @@
 #include <linux/pci.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
+#include <linux/interrupt.h>
 
 #include <asm/addrspace.h>
+#include <asm/txx9irq.h>
+#include <asm/txx9/pci.h>
 #include <asm/txx9/tx3927.h>
 
-static inline int mkaddr(unsigned char bus, unsigned char dev_fn,
-	unsigned char where)
+static int mkaddr(struct pci_bus *bus, unsigned char devfn, unsigned char where)
 {
-	if (bus == 0 && dev_fn >= PCI_DEVFN(TX3927_PCIC_MAX_DEVNU, 0))
-		return PCIBIOS_DEVICE_NOT_FOUND;
-
-	tx3927_pcicptr->ica = ((bus & 0xff) << 0x10) |
-	                      ((dev_fn & 0xff) << 0x08) |
-	                      (where & 0xfc);
+	if (bus->parent == NULL &&
+	    devfn >= PCI_DEVFN(TX3927_PCIC_MAX_DEVNU, 0))
+		return -1;
+	tx3927_pcicptr->ica =
+		((bus->number & 0xff) << 0x10) |
+		((devfn & 0xff) << 0x08) |
+		(where & 0xfc) | (bus->parent ? 1 : 0);
 
 	/* clear M_ABORT and Disable M_ABORT Int. */
 	tx3927_pcicptr->pcistat |= PCI_STATUS_REC_MASTER_ABORT;
 	tx3927_pcicptr->pcistatim &= ~PCI_STATUS_REC_MASTER_ABORT;
-
-	return PCIBIOS_SUCCESSFUL;
+	return 0;
 }
 
 static inline int check_abort(void)
 {
-	if (tx3927_pcicptr->pcistat & PCI_STATUS_REC_MASTER_ABORT)
+	if (tx3927_pcicptr->pcistat & PCI_STATUS_REC_MASTER_ABORT) {
 		tx3927_pcicptr->pcistat |= PCI_STATUS_REC_MASTER_ABORT;
 		tx3927_pcicptr->pcistatim |= PCI_STATUS_REC_MASTER_ABORT;
+		/* flush write buffer */
+		iob();
 		return PCIBIOS_DEVICE_NOT_FOUND;
-
+	}
 	return PCIBIOS_SUCCESSFUL;
 }
 
 static int tx3927_pci_read_config(struct pci_bus *bus, unsigned int devfn,
 	int where, int size, u32 * val)
 {
-	int ret;
-
-	ret = mkaddr(bus->number, devfn, where);
-	if (ret)
-		return ret;
+	if (mkaddr(bus, devfn, where)) {
+		*val = 0xffffffff;
+		return PCIBIOS_DEVICE_NOT_FOUND;
+	}
 
 	switch (size) {
 	case 1:
@@ -97,11 +100,8 @@ static int tx3927_pci_read_config(struct pci_bus *bus, unsigned int devfn,
 static int tx3927_pci_write_config(struct pci_bus *bus, unsigned int devfn,
 	int where, int size, u32 val)
 {
-	int ret;
-
-	ret = mkaddr(bus->number, devfn, where);
-	if (ret)
-		return ret;
+	if (mkaddr(bus, devfn, where))
+		return PCIBIOS_DEVICE_NOT_FOUND;
 
 	switch (size) {
 	case 1:
@@ -117,11 +117,6 @@ static int tx3927_pci_write_config(struct pci_bus *bus, unsigned int devfn,
 		tx3927_pcicptr->icd = cpu_to_le32(val);
 	}
 
-	if (tx3927_pcicptr->pcistat & PCI_STATUS_REC_MASTER_ABORT)
-		tx3927_pcicptr->pcistat |= PCI_STATUS_REC_MASTER_ABORT;
-		tx3927_pcicptr->pcistatim |= PCI_STATUS_REC_MASTER_ABORT;
-		return PCIBIOS_DEVICE_NOT_FOUND;
-
 	return check_abort();
 }
 
@@ -202,3 +197,34 @@ void __init tx3927_pcic_setup(struct pci_controller *channel,
 		PCI_COMMAND_PARITY | PCI_COMMAND_SERR;
 	local_irq_restore(flags);
 }
+
+static irqreturn_t tx3927_pcierr_interrupt(int irq, void *dev_id)
+{
+	struct pt_regs *regs = get_irq_regs();
+
+	if (txx9_pci_err_action != TXX9_PCI_ERR_IGNORE) {
+		printk(KERN_WARNING "PCI error interrupt at 0x%08lx.\n",
+		       regs->cp0_epc);
+		printk(KERN_WARNING "pcistat:%02x, lbstat:%04lx\n",
+		       tx3927_pcicptr->pcistat, tx3927_pcicptr->lbstat);
+	}
+	if (txx9_pci_err_action != TXX9_PCI_ERR_PANIC) {
+		/* clear all pci errors */
+		tx3927_pcicptr->pcistat |= TX3927_PCIC_PCISTATIM_ALL;
+		tx3927_pcicptr->istat = TX3927_PCIC_IIM_ALL;
+		tx3927_pcicptr->tstat = TX3927_PCIC_TIM_ALL;
+		tx3927_pcicptr->lbstat = TX3927_PCIC_LBIM_ALL;
+		return IRQ_HANDLED;
+	}
+	console_verbose();
+	panic("PCI error.");
+}
+
+void __init tx3927_setup_pcierr_irq(void)
+{
+	if (request_irq(TXX9_IRQ_BASE + TX3927_IR_PCI,
+			tx3927_pcierr_interrupt,
+			IRQF_DISABLED, "PCI error",
+			(void *)TX3927_PCIC_REG))
+		printk(KERN_WARNING "Failed to request irq for PCIERR\n");
+}