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eNET: Add PC/AT compatibility setup function 

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

Set all interrupts and timers up to be PC/AT compatible

Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
This commit is contained in:
Graeme Russ 2010-04-24 00:05:56 +10:00 committed by Wolfgang Denk
parent 8fd805632f
commit 4a4c31ae08
1 changed files with 38 additions and 0 deletions
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38
board/eNET/eNET.c
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@ -180,3 +180,41 @@ int board_eth_init(bd_t *bis)
{
return pci_eth_init(bis);
}
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);
}