File: [local] / funnyos / arch / testarm / dev / tartc.c (download)
Revision 1.3, Mon Oct 29 21:10:03 2007 UTC (16 years, 11 months ago) by init
Branch: MAIN
Changes since 1.2: +12 -2 lines
use new dr_interrupt pointer in struct driver for future interrupts support
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/*
* $Id: tartc.c,v 1.3 2007/10/29 21:10:03 init Exp $
*/
#include <sys/types.h>
#include <sys/device.h>
#include <sys/bus.h>
#include <arch/testarm/dev/tartcvar.h>
#include <arch/testarm/dev/tartcreg.h>
#include <libkern/printf.h>
/*
* testarm Real Time Clock driver.
*/
int tartc_attach(struct device *, uint32_t loc, uint8_t flags);
void tartc_interrupt(struct device *);
struct driver tartc_dr = {
sizeof(struct tartc_dd),
tartc_attach,
NULL,
tartc_interrupt
};
int
tartc_attach(struct device *self, uint32_t loc, uint8_t flags)
{
struct tartc_dd *ddp = self->dv_devdata;
uint32_t seconds;
/* acquire bus_handle from parent */
ddp->td_bushandlep = self->dv_parent->dv_aux;
/* save our location on parent (or use default if loc == 0) */
ddp->td_ioaddr = (loc != 0) ? loc : TARTC_REG_BASE;
/*
* Read seconds past Epoch.
*/
/* trigger clock update on host */
bus_write_1(ddp->td_bushandlep, ddp->td_ioaddr + TARTC_OFF_CLOCKUPDATE, 1);
/* get seconds past Epoch */
seconds = bus_read_4(ddp->td_bushandlep, ddp->td_ioaddr + TARTC_OFF_READSECONDS);
printf("testarm Real Time Clock (%d seconds past Epoch)\n", seconds);
return(0);
}
void
tartc_interrupt(struct device *self)
{
/* TODO */
}