2 * Copyright (C) 2006 Freescale Semiconductor, Inc.
4 * Dave Liu <daveliu@freescale.com>
5 * based on source code of Shlomi Gridish
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 of
10 * the License, or (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
24 #include "asm/errno.h"
26 #include "asm/immap_83xx.h"
28 #define NUM_OF_PINS 32
29 void qe_config_iopin(u8 port, u8 pin, int dir, int open_drain, int assign)
36 volatile immap_t *im = (volatile immap_t *)CONFIG_SYS_IMMR;
37 volatile qepio83xx_t *par_io = (volatile qepio83xx_t *)&im->qepio;
39 /* Caculate pin location and 2bit mask and dir */
40 pin_2bit_mask = (u32)(0x3 << (NUM_OF_PINS-(pin%(NUM_OF_PINS/2)+1)*2));
41 pin_2bit_dir = (u32)(dir << (NUM_OF_PINS-(pin%(NUM_OF_PINS/2)+1)*2));
43 /* Setup the direction */
44 tmp_val = (pin > (NUM_OF_PINS/2) - 1) ? \
45 in_be32(&par_io->ioport[port].dir2) :
46 in_be32(&par_io->ioport[port].dir1);
48 if (pin > (NUM_OF_PINS/2) -1) {
49 out_be32(&par_io->ioport[port].dir2, ~pin_2bit_mask & tmp_val);
50 out_be32(&par_io->ioport[port].dir2, pin_2bit_dir | tmp_val);
52 out_be32(&par_io->ioport[port].dir1, ~pin_2bit_mask & tmp_val);
53 out_be32(&par_io->ioport[port].dir1, pin_2bit_dir | tmp_val);
56 /* Calculate pin location for 1bit mask */
57 pin_1bit_mask = (u32)(1 << (NUM_OF_PINS - (pin+1)));
59 /* Setup the open drain */
60 tmp_val = in_be32(&par_io->ioport[port].podr);
62 out_be32(&par_io->ioport[port].podr, pin_1bit_mask | tmp_val);
64 out_be32(&par_io->ioport[port].podr, ~pin_1bit_mask & tmp_val);
67 /* Setup the assignment */
68 tmp_val = (pin > (NUM_OF_PINS/2) - 1) ?
69 in_be32(&par_io->ioport[port].ppar2):
70 in_be32(&par_io->ioport[port].ppar1);
71 pin_2bit_assign = (u32)(assign
72 << (NUM_OF_PINS - (pin%(NUM_OF_PINS/2)+1)*2));
74 /* Clear and set 2 bits mask */
75 if (pin > (NUM_OF_PINS/2) - 1) {
76 out_be32(&par_io->ioport[port].ppar2, ~pin_2bit_mask & tmp_val);
77 out_be32(&par_io->ioport[port].ppar2, pin_2bit_assign | tmp_val);
79 out_be32(&par_io->ioport[port].ppar1, ~pin_2bit_mask & tmp_val);
80 out_be32(&par_io->ioport[port].ppar1, pin_2bit_assign | tmp_val);