[U-Boot] [RFC][PATCH 20/21] [eNET] Add PC/AT compatibility setup function

Graeme Russ
2010-03-25T11:23:02Z

The eNET uses the sc520 software timers rather than the PC/AT clones

Set all interrupts and timers up to be PC/AT compatible
---
board/eNET/eNET.c | 38 ++++++++++++++++++++++++++++++++++++++
1 files changed, 38 insertions(+), 0 deletions(-)

diff --git a/board/eNET/eNET.c b/board/eNET/eNET.c
index 9d782f3..ac3f958 100644
--- a/board/eNET/eNET.c
+++ b/board/eNET/eNET.c
@@ -185,3 +185,41 @@ int board_eth_init(bd_t *bis)
eth_init(bis);

return adapters;
+
+void setup_pcat_compatibility()
+{
+ /* disable global interrupt mode */
+ writeb(0x40, &sc520_mmcr->picicr);
+
+ /* set all irqs to edge */
+ writeb(0x00, &sc520_mmcr->pic_mode[0]);
+ writeb(0x00, &sc520_mmcr->pic_mode[1]);
+ writeb(0x00, &sc520_mmcr->pic_mode[2]);
+
+ /*
+ * active low polarity on PIC interrupt pins,
+ * active high polarity on all other irq pins
+ */
+ writew(0x0000,&sc520_mmcr->intpinpol);
+
+ /* Set PIT 0 -> IRQ0, RTC -> IRQ8, FP error -> IRQ13 */
+ writeb(SC520_IRQ0, &sc520_mmcr->pit_int_map[0]);
+ writeb(SC520_IRQ8, &sc520_mmcr->rtcmap);
+ writeb(SC520_IRQ13, &sc520_mmcr->ferrmap);
+
+ /* Disable all other interrupt sources */
+ writeb(SC520_IRQ_DISABLED, &sc520_mmcr->gp_tmr_int_map[0]);
+ writeb(SC520_IRQ_DISABLED, &sc520_mmcr->gp_tmr_int_map[1]);
+ writeb(SC520_IRQ_DISABLED, &sc520_mmcr->gp_tmr_int_map[2]);
+ writeb(SC520_IRQ_DISABLED, &sc520_mmcr->pit_int_map[1]);
+ writeb(SC520_IRQ_DISABLED, &sc520_mmcr->pit_int_map[2]);
+ writeb(SC520_IRQ_DISABLED, &sc520_mmcr->pci_int_map[0]); /* disable PCI INT A */
+ writeb(SC520_IRQ_DISABLED, &sc520_mmcr->pci_int_map[1]); /* disable PCI INT B */
+ writeb(SC520_IRQ_DISABLED, &sc520_mmcr->pci_int_map[2]); /* disable PCI INT C */
+ writeb(SC520_IRQ_DISABLED, &sc520_mmcr->pci_int_map[3]); /* disable PCI INT D */
+ writeb(SC520_IRQ_DISABLED, &sc520_mmcr->dmabcintmap); /* disable DMA INT */
+ writeb(SC520_IRQ_DISABLED, &sc520_mmcr->ssimap);
+ writeb(SC520_IRQ_DISABLED, &sc520_mmcr->wdtmap);
+ writeb(SC520_IRQ_DISABLED, &sc520_mmcr->wpvmap);
+ writeb(SC520_IRQ_DISABLED, &sc520_mmcr->icemap);
+}
--
1.7.0.2.182.ge007