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authorPaul Burton <paul.burton@imgtec.com>2013-11-08 11:18:57 +0000
committerDaniel Schwierzeck <daniel.schwierzeck@gmail.com>2013-11-09 17:21:02 +0100
commit81f98bbd62b66e4a590fe6fe9b0d8231e45beffd (patch)
treeb7ea029d769b9c014983faa2c55f3e4302d1145e /board/imgtec/malta/malta.c
parentfba6f45cdcf77985c4bf891322b5442bda1005e0 (diff)
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malta: setup PIIX4 interrupt route
Without setting up the PIRQ[A:D] interrupt routes, PCI interrupts will be left disabled. Linux does not set up this routing but relies upon it having been set up by the bootloader, reading back the IRQ lines which the PIRQ[A:D] signals have been routed to. This patch routes PIRQA & PIRQB to IRQ 10, and PIRQC & PIRQD to IRQ 11. This matches the setup used by YAMON. Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Diffstat (limited to 'board/imgtec/malta/malta.c')
-rw-r--r--board/imgtec/malta/malta.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/board/imgtec/malta/malta.c b/board/imgtec/malta/malta.c
index 2f92259..a1a4c01 100644
--- a/board/imgtec/malta/malta.c
+++ b/board/imgtec/malta/malta.c
@@ -7,6 +7,7 @@
#include <common.h>
#include <netdev.h>
+#include <pci.h>
#include <pci_gt64120.h>
#include <pci_msc01.h>
#include <rtc.h>
@@ -169,6 +170,8 @@ struct serial_device *default_serial_console(void)
void pci_init_board(void)
{
+ pci_dev_t bdf;
+
switch (malta_sys_con()) {
case SYSCON_GT64120:
set_io_port_base(CKSEG1ADDR(MALTA_GT_PCIIO_BASE));
@@ -191,4 +194,15 @@ void pci_init_board(void)
0x00000000, MALTA_MSC01_PCIIO_SIZE);
break;
}
+
+ bdf = pci_find_device(PCI_VENDOR_ID_INTEL,
+ PCI_DEVICE_ID_INTEL_82371AB_0, 0);
+ if (bdf == -1)
+ panic("Failed to find PIIX4 PCI bridge\n");
+
+ /* setup PCI interrupt routing */
+ pci_write_config_byte(bdf, PCI_CFG_PIIX4_PIRQRCA, 10);
+ 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);
}