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-rw-r--r--arch/mips/include/asm/malta.h7
-rw-r--r--board/imgtec/malta/malta.c12
2 files changed, 19 insertions, 0 deletions
diff --git a/arch/mips/include/asm/malta.h b/arch/mips/include/asm/malta.h
index bd9043d51c..9e7c045aac 100644
--- a/arch/mips/include/asm/malta.h
+++ b/arch/mips/include/asm/malta.h
@@ -56,5 +56,12 @@
#define PCI_CFG_PIIX4_PIRQRCB 0x61
#define PCI_CFG_PIIX4_PIRQRCC 0x62
#define PCI_CFG_PIIX4_PIRQRCD 0x63
+#define PCI_CFG_PIIX4_SERIRQC 0x64
+#define PCI_CFG_PIIX4_GENCFG 0xb0
+
+#define PCI_CFG_PIIX4_SERIRQC_EN (1 << 7)
+#define PCI_CFG_PIIX4_SERIRQC_CONT (1 << 6)
+
+#define PCI_CFG_PIIX4_GENCFG_SERIRQ (1 << 16)
#endif /* _MIPS_ASM_MALTA_H */
diff --git a/board/imgtec/malta/malta.c b/board/imgtec/malta/malta.c
index a1a4c01866..d363e49919 100644
--- a/board/imgtec/malta/malta.c
+++ b/board/imgtec/malta/malta.c
@@ -171,6 +171,8 @@ struct serial_device *default_serial_console(void)
void pci_init_board(void)
{
pci_dev_t bdf;
+ u32 val32;
+ u8 val8;
switch (malta_sys_con()) {
case SYSCON_GT64120:
@@ -205,4 +207,14 @@ void pci_init_board(void)
pci_write_config_byte(bdf, PCI_CFG_PIIX4_PIRQRCB, 10);
pci_write_config_byte(bdf, PCI_CFG_PIIX4_PIRQRCC, 11);
pci_write_config_byte(bdf, PCI_CFG_PIIX4_PIRQRCD, 11);
+
+ /* mux SERIRQ onto SERIRQ pin */
+ pci_read_config_dword(bdf, PCI_CFG_PIIX4_GENCFG, &val32);
+ val32 |= PCI_CFG_PIIX4_GENCFG_SERIRQ;
+ pci_write_config_dword(bdf, PCI_CFG_PIIX4_GENCFG, val32);
+
+ /* enable SERIRQ - Linux currently depends upon this */
+ pci_read_config_byte(bdf, PCI_CFG_PIIX4_SERIRQC, &val8);
+ val8 |= PCI_CFG_PIIX4_SERIRQC_EN | PCI_CFG_PIIX4_SERIRQC_CONT;
+ pci_write_config_byte(bdf, PCI_CFG_PIIX4_SERIRQC, val8);
}