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/*
* Copyright (C) 2006 Freescale Semiconductor, Inc.
*
* Dave Liu <daveliu@freescale.com>
* based on source code of Shlomi Gridish
*
* 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 "asm/errno.h"
#include "asm/io.h"
#include "asm/immap_83xx.h"
#define NUM_OF_PINS 32
void qe_config_iopin(u8 port, u8 pin, int dir, int open_drain, int assign)
{
u32 pin_2bit_mask;
u32 pin_2bit_dir;
u32 pin_2bit_assign;
u32 pin_1bit_mask;
u32 tmp_val;
volatile immap_t *im = (volatile immap_t *)CONFIG_SYS_IMMR;
volatile qepio83xx_t *par_io = (volatile qepio83xx_t *)&im->qepio;
/* Caculate pin location and 2bit mask and dir */
pin_2bit_mask = (u32)(0x3 << (NUM_OF_PINS-(pin%(NUM_OF_PINS/2)+1)*2));
pin_2bit_dir = (u32)(dir << (NUM_OF_PINS-(pin%(NUM_OF_PINS/2)+1)*2));
/* Setup the direction */
tmp_val = (pin > (NUM_OF_PINS/2) - 1) ? \
in_be32(&par_io->ioport[port].dir2) :
in_be32(&par_io->ioport[port].dir1);
if (pin > (NUM_OF_PINS/2) -1) {
out_be32(&par_io->ioport[port].dir2, ~pin_2bit_mask & tmp_val);
out_be32(&par_io->ioport[port].dir2, pin_2bit_dir | tmp_val);
} else {
out_be32(&par_io->ioport[port].dir1, ~pin_2bit_mask & tmp_val);
out_be32(&par_io->ioport[port].dir1, pin_2bit_dir | tmp_val);
}
/* Calculate pin location for 1bit mask */
pin_1bit_mask = (u32)(1 << (NUM_OF_PINS - (pin+1)));
/* Setup the open drain */
tmp_val = in_be32(&par_io->ioport[port].podr);
if (open_drain) {
out_be32(&par_io->ioport[port].podr, pin_1bit_mask | tmp_val);
} else {
out_be32(&par_io->ioport[port].podr, ~pin_1bit_mask & tmp_val);
}
/* Setup the assignment */
tmp_val = (pin > (NUM_OF_PINS/2) - 1) ?
in_be32(&par_io->ioport[port].ppar2):
in_be32(&par_io->ioport[port].ppar1);
pin_2bit_assign = (u32)(assign
<< (NUM_OF_PINS - (pin%(NUM_OF_PINS/2)+1)*2));
/* Clear and set 2 bits mask */
if (pin > (NUM_OF_PINS/2) - 1) {
out_be32(&par_io->ioport[port].ppar2, ~pin_2bit_mask & tmp_val);
out_be32(&par_io->ioport[port].ppar2, pin_2bit_assign | tmp_val);
} else {
out_be32(&par_io->ioport[port].ppar1, ~pin_2bit_mask & tmp_val);
out_be32(&par_io->ioport[port].ppar1, pin_2bit_assign | tmp_val);
}
}
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