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/*
* (C) Copyright 2008
* Martha J Marx, Silicon Turnkey Express, mmarx@silicontkx.com
* mpc512x I/O pin/pad initialization for the ADS5121 board
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <linux/types.h>
#include <asm/io.h>
void iopin_initialize(iopin_t *ioregs_init, int len)
{
short i, j, p;
u32 *reg;
immap_t *im = (immap_t *)CONFIG_SYS_IMMR;
reg = (u32 *)&(im->io_ctrl);
if (sizeof(ioregs_init) == 0)
return;
for (i = 0; i < len; i++) {
for (p = 0, j = ioregs_init[i].p_offset / sizeof(u_long);
p < ioregs_init[i].nr_pins; p++, j++) {
if (ioregs_init[i].bit_or)
setbits_be32(reg + j, ioregs_init[i].val);
else
out_be32 (reg + j, ioregs_init[i].val);
}
}
return;
}
void iopin_initialize_bits(iopin_t *ioregs_init, int len)
{
short i, j, p;
u32 *reg, mask;
immap_t *im = (immap_t *)CONFIG_SYS_IMMR;
reg = (u32 *)&(im->io_ctrl);
/* iterate over table entries */
for (i = 0; i < len; i++) {
/* iterate over pins within a table entry */
for (p = 0, j = ioregs_init[i].p_offset / sizeof(u_long);
p < ioregs_init[i].nr_pins; p++, j++) {
if (ioregs_init[i].bit_or & IO_PIN_OVER_EACH) {
/* replace all settings at once */
out_be32(reg + j, ioregs_init[i].val);
} else {
/*
* only replace individual parts, but
* REPLACE them instead of just ORing
* them in and "inheriting" previously
* set bits which we don't want
*/
mask = 0;
if (ioregs_init[i].bit_or & IO_PIN_OVER_FMUX)
mask |= IO_PIN_FMUX(3);
if (ioregs_init[i].bit_or & IO_PIN_OVER_HOLD)
mask |= IO_PIN_HOLD(3);
if (ioregs_init[i].bit_or & IO_PIN_OVER_PULL)
mask |= IO_PIN_PUD(1) | IO_PIN_PUE(1);
if (ioregs_init[i].bit_or & IO_PIN_OVER_STRIG)
mask |= IO_PIN_ST(1);
if (ioregs_init[i].bit_or & IO_PIN_OVER_DRVSTR)
mask |= IO_PIN_DS(3);
/*
* DON'T do the "mask, then insert"
* in place on the register, it may
* break access to external hardware
* (like boot ROMs) when configuring
* LPB related pins, while the code to
* configure the pin is read from this
* very address region
*/
clrsetbits_be32(reg + j, mask,
ioregs_init[i].val & mask);
}
}
}
}
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