cpu/mpc83xx/qe_io.c

   1 /*
   2  * Copyright (C) 2006 Freescale Semiconductor, Inc.
   3  *
   4  * Dave Liu <daveliu@freescale.com>
   5  * based on source code of Shlomi Gridish
   6  *
   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.
  11  *
  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.
  16  *
  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,
  20  * MA 02111-1307 USA
  21  */
  22
  23 #include "common.h"
  24 #include "asm/errno.h"
  25 #include "asm/io.h"
  26 #include "asm/immap_83xx.h"
  27
  28 #if defined(CONFIG_QE)
  29 #define NUM_OF_PINS     32
  30 void qe_config_iopin(u8 port, u8 pin, int dir, int open_drain, int assign)
  31 {
  32         u32                     pin_2bit_mask;
  33         u32                     pin_2bit_dir;
  34         u32                     pin_2bit_assign;
  35         u32                     pin_1bit_mask;
  36         u32                     tmp_val;
  37         volatile immap_t        *im = (volatile immap_t *)CFG_IMMR;
  38         volatile qepio83xx_t    *par_io = (volatile qepio83xx_t *)&im->qepio;
  39
  40         /* Caculate pin location and 2bit mask and dir */
  41         pin_2bit_mask = (u32)(0x3 << (NUM_OF_PINS-(pin%(NUM_OF_PINS/2)+1)*2));
  42         pin_2bit_dir = (u32)(dir << (NUM_OF_PINS-(pin%(NUM_OF_PINS/2)+1)*2));
  43
  44         /* Setup the direction */
  45         tmp_val = (pin > (NUM_OF_PINS/2) - 1) ? \
  46                 in_be32(&par_io->ioport[port].dir2) :
  47                 in_be32(&par_io->ioport[port].dir1);
  48
  49         if (pin > (NUM_OF_PINS/2) -1) {
  50                 out_be32(&par_io->ioport[port].dir2, ~pin_2bit_mask & tmp_val);
  51                 out_be32(&par_io->ioport[port].dir2, pin_2bit_dir | tmp_val);
  52         } else {
  53                 out_be32(&par_io->ioport[port].dir1, ~pin_2bit_mask & tmp_val);
  54                 out_be32(&par_io->ioport[port].dir1, pin_2bit_dir | tmp_val);
  55         }
  56
  57         /* Calculate pin location for 1bit mask */
  58         pin_1bit_mask = (u32)(1 << (NUM_OF_PINS - (pin+1)));
  59
  60         /* Setup the open drain */
  61         tmp_val = in_be32(&par_io->ioport[port].podr);
  62         if (open_drain) {
  63                 out_be32(&par_io->ioport[port].podr, pin_1bit_mask | tmp_val);
  64         } else {
  65                 out_be32(&par_io->ioport[port].podr, ~pin_1bit_mask & tmp_val);
  66         }
  67
  68         /* Setup the assignment */
  69         tmp_val = (pin > (NUM_OF_PINS/2) - 1) ?
  70                 in_be32(&par_io->ioport[port].ppar2):
  71                 in_be32(&par_io->ioport[port].ppar1);
  72         pin_2bit_assign = (u32)(assign
  73                                 << (NUM_OF_PINS - (pin%(NUM_OF_PINS/2)+1)*2));
  74
  75         /* Clear and set 2 bits mask */
  76         if (pin > (NUM_OF_PINS/2) - 1) {
  77                 out_be32(&par_io->ioport[port].ppar2, ~pin_2bit_mask & tmp_val);
  78                 out_be32(&par_io->ioport[port].ppar2, pin_2bit_assign | tmp_val);
  79         } else {
  80                 out_be32(&par_io->ioport[port].ppar1, ~pin_2bit_mask & tmp_val);
  81                 out_be32(&par_io->ioport[port].ppar1, pin_2bit_assign | tmp_val);
  82         }
  83 }
  84
  85 #endif /* CONFIG_QE */