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Added the upmconfig() function for 85xx.

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Signed-off-by: Sergei Poselenov <sposelenov@emcraft.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>
This commit is contained in:
Sergei Poselenov 2008-06-06 15:42:40 +02:00 committed by Andrew Fleming-AFLEMING
parent d39e68514f
commit 740280e68c
2 changed files with 70 additions and 0 deletions
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66
cpu/mpc85xx/cpu.c
View File

@ -29,6 +29,7 @@
#include <watchdog.h>
#include <command.h>
#include <asm/cache.h>
#include <asm/io.h>
DECLARE_GLOBAL_DATA_PTR;
@ -287,3 +288,68 @@ int dma_xfer(void *dest, uint count, void *src) {
return dma_check();
}
#endif
/*
* Configures a UPM. Currently, the loop fields in MxMR (RLF, WLF and TLF)
* are hardcoded as "1"."size" is the number or entries, not a sizeof.
*/
void upmconfig (uint upm, uint * table, uint size)
{
int i, mdr, mad, old_mad = 0;
volatile u32 *mxmr;
volatile ccsr_lbc_t *lbc = (void *)(CFG_MPC85xx_LBC_ADDR);
int loopval = 0x00004440;
volatile u32 *brp,*orp;
volatile u8* dummy = NULL;
int upmmask;
switch (upm) {
case UPMA:
mxmr = &lbc->mamr;
upmmask = BR_MS_UPMA;
break;
case UPMB:
mxmr = &lbc->mbmr;
upmmask = BR_MS_UPMB;
break;
case UPMC:
mxmr = &lbc->mcmr;
upmmask = BR_MS_UPMC;
break;
default:
printf("%s: Bad UPM index %d to configure\n", __FUNCTION__, upm);
hang();
}
/* Find the address for the dummy write transaction */
for (brp = &lbc->br0, orp = &lbc->or0, i = 0; i < 8;
i++, brp += 2, orp += 2) {
/* Look for a valid BR with selected UPM */
if ((in_be32(brp) & (BR_V | upmmask)) == (BR_V | upmmask)) {
dummy = (volatile u8*)(in_be32(brp) >> BR_BA_SHIFT);
break;
}
}
if (i == 8) {
printf("Error: %s() could not find matching BR\n", __FUNCTION__);
hang();
}
for (i = 0; i < size; i++) {
/* 1 */
out_be32(mxmr, loopval | 0x10000000 | i); /* OP_WRITE */
/* 2 */
out_be32(&lbc->mdr, table[i]);
/* 3 */
mdr = in_be32(&lbc->mdr);
/* 4 */
*(volatile u8 *)dummy = 0;
/* 5 */
do {
mad = in_be32(mxmr) & 0x3f;
} while (mad <= old_mad && !(!mad && i == (size-1)));
old_mad = mad;
}
out_be32(mxmr, loopval); /* OP_NORMAL */
}

4
include/asm-ppc/fsl_lbc.h
View File

@ -59,6 +59,10 @@
#define BR_V 0x00000001
#define BR_V_SHIFT 0
#define UPMA 0
#define UPMB 1
#define UPMC 2
#if defined(CONFIG_MPC834X)
#define BR_RES ~(BR_BA | BR_PS | BR_DECC | BR_WP | BR_MSEL | BR_V)
#else