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

[Graeme Russ]

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