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Blackfin: bf533-stamp: rewrite resource swap logic

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The old swap function tended to clobber unrelated pins and screw up masks.
Rewrite the thing from scratch so it only uses the resources it needs.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Mike Frysinger 2008-10-11 22:38:37 -04:00
parent 29d4ea0a90
commit 1f75d6f0ff
1 changed files with 15 additions and 24 deletions
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35
board/bf533-stamp/bf533-stamp.c
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@ -54,29 +54,23 @@ phys_size_t initdram(int board_type)
return gd->bd->bi_memsize;
}
/* PF0 and PF1 are used to switch between the ethernet and flash:
* PF0 PF1
* flash: 0 0
* ether: 1 0
*/
void swap_to(int device_id)
{
if (device_id == ETHERNET) {
*pFIO_DIR = PF0;
bfin_write_FIO_DIR(bfin_read_FIO_DIR() | PF1 | PF0);
SSYNC();
*pFIO_FLAG_S = PF0;
bfin_write_FIO_FLAG_C(PF1);
if (device_id == ETHERNET)
bfin_write_FIO_FLAG_S(PF0);
else if (device_id == FLASH)
bfin_write_FIO_FLAG_C(PF0);
else
printf("Unknown device to switch\n");
SSYNC();
} else if (device_id == FLASH) {
*pFIO_DIR = (PF4 | PF3 | PF2 | PF1 | PF0);
*pFIO_FLAG_S = (PF4 | PF3 | PF2);
*pFIO_MASKA_D = (PF8 | PF6 | PF5);
*pFIO_MASKB_D = (PF7);
*pFIO_POLAR = (PF8 | PF6 | PF5);
*pFIO_EDGE = (PF8 | PF7 | PF6 | PF5);
*pFIO_INEN = (PF8 | PF7 | PF6 | PF5);
*pFIO_FLAG_D = (PF4 | PF3 | PF2);
SSYNC();
} else {
printf("Unknown bank to switch\n");
}
return;
}
#if defined(CONFIG_MISC_INIT_R)
@ -104,9 +98,6 @@ int misc_init_r(void)
if (cf_stat) {
printf("Booting from COMPACT flash\n");
/* Set cycle time for CF */
*(volatile unsigned long *)ambctl1 = CF_AMBCTL1VAL;
for (i = 0; i < 0x1000; i++)
asm("nop;");
for (i = 0; i < 0x1000; i++)