board/rsk7203/rsk7203.c

   1 /*
   2  * Copyright (C) 2008 Nobuhiro Iwamatsu
   3  * Copyright (C) 2008 Renesas Solutions Corp.
   4  *
   5  * u-boot/board/rsk7203/rsk7203.c
   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/io.h>
  25 #include <asm/processor.h>
  26
  27 int checkboard(void)
  28 {
  29         puts("BOARD: Renesas Technology RSK7203\n");
  30         return 0;
  31 }
  32
  33 int board_init(void)
  34 {
  35         return 0;
  36 }
  37
  38 int dram_init(void)
  39 {
  40         DECLARE_GLOBAL_DATA_PTR;
  41
  42         gd->bd->bi_memstart = CONFIG_SYS_SDRAM_BASE;
  43         gd->bd->bi_memsize = CONFIG_SYS_SDRAM_SIZE;
  44         printf("DRAM:  %dMB\n", CONFIG_SYS_SDRAM_SIZE / (1024 * 1024));
  45         return 0;
  46 }
  47
  48 void led_set_state(unsigned short value)
  49 {
  50 }
  51
  52 /*
  53  * The RSK board has the SMSC9118 wired up 'incorrectly'.
  54  * Byte-swapping is necessary, and so poor performance is inevitable.
  55  * This problem cannot evade by the swap function of CHIP, this can
  56  * evade by software Byte-swapping.
  57  * And this has problem by FIFO access only. pkt_data_pull/pkt_data_push
  58  * functions necessary to solve this problem.
  59  */
  60 u32 pkt_data_pull(u32 addr)
  61 {
  62         volatile u16 *addr_16 = (u16 *)addr;
  63         return (u32)((swab16(*addr_16) << 16) & 0xFFFF0000)\
  64                                 | swab16(*(addr_16 + 1));
  65 }
  66
  67 void pkt_data_push(u32 addr, u32 val)
  68 {
  69         *(volatile u16 *)(addr + 2) = swab16((u16)val);
  70         *(volatile u16 *)(addr) = swab16((u16)(val >> 16));
  71 }