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powerpc 83xx/85xx: Merge lbc upmconfig code

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Each platform had its own version of the upmconfig, despite the
init process being identical.  Now that we have a spot for common
lbc code, create a common upmconfig() there.

Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org>
Acked-by: Kim Phillips <kim.phillips@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Becky Bruce
2010-06-17 11:37:26 -05:00
committed by Kumar Gala
parent 199e262eb3
commit f2d9a5da29
4 changed files with 53 additions and 127 deletions
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50
arch/powerpc/cpu/mpc8xxx/fsl_lbc.c
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@ -82,3 +82,53 @@ void init_early_memctl_regs(void)
set_lbc_br(7, CONFIG_SYS_BR7_PRELIM);
#endif
}
/*
* Configures a UPM. The function requires the respective MxMR to be set
* before calling this function. "size" is the number or entries, not a sizeof.
*/
void upmconfig(uint upm, uint *table, uint size)
{
fsl_lbc_t *lbc = LBC_BASE_ADDR;
int i, mdr, mad, old_mad = 0;
u32 mask = (~MxMR_OP_MSK & ~MxMR_MAD_MSK);
u32 msel = BR_UPMx_TO_MSEL(upm);
u32 *mxmr = &lbc->mamr + upm;
volatile u8 *dummy = NULL;
if (upm < UPMA || upm > UPMC) {
printf("Error: %s() Bad UPM index %d\n", __func__, upm);
hang();
}
/*
* Find the address for the dummy write - scan all of the BRs until we
* find one matching the UPM and extract the base address bits from it.
*/
for (i = 0; i < 8; i++) {
if ((get_lbc_br(i) & (BR_V | BR_MSEL)) == (BR_V | msel)) {
dummy = (volatile u8 *)(get_lbc_br(i) & BR_BA);
break;
}
}
if (!dummy) {
printf("Error: %s() No matching BR\n", __func__);
hang();
}
/* Program UPM using steps outlined by the reference manual */
for (i = 0; i < size; i++) {
out_be32(mxmr, (in_be32(mxmr) & mask) | MxMR_OP_WARR | i);
out_be32(&lbc->mdr, table[i]);
mdr = in_be32(&lbc->mdr);
*dummy = 0;
do {
mad = in_be32(mxmr) & MxMR_MAD_MSK;
} while (mad <= old_mad && !(!mad && i == (size-1)));
old_mad = mad;
}
/* Return to normal operation */
out_be32(mxmr, (in_be32(mxmr) & mask) | MxMR_OP_NORM);
}