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/*
* (C) Copyright 2008 Dmitry Rakhchev, EmCraft Systems, rda@emcraft.com
*
* Developed for DENX Software Engineering GmbH
*
* 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>
#ifdef CONFIG_POST
/* This test attempts to verify board GDC. A scratch register tested, then
* simple memory test (get_ram_size()) run over GDC memory.
*/
#include <post.h>
#include <asm/io.h>
DECLARE_GLOBAL_DATA_PTR;
#define GDC_SCRATCH_REG 0xC1FF8044
#define GDC_VERSION_REG 0xC1FF8084
#define GDC_RAM_START 0xC0000000
#define GDC_RAM_END 0xC2000000
#if CONFIG_POST & CFG_POST_BSPEC4
static int gdc_test_reg_one(uint value)
{
int ret = 0;
uint read_value;
/* write test pattern */
out_be32((void *)GDC_SCRATCH_REG, value);
/* read other location (protect against data lines capacity) */
ret = in_be32((void *)GDC_RAM_START);
/* verify test pattern */
read_value = in_be32((void *)GDC_SCRATCH_REG);
if (read_value != value) {
post_log("GDC SCRATCH test failed write %08X, read %08X\n",
value, read_value);
ret = 1;
}
return ret;
}
/* Verify GDC, get memory size */
int gdc_post_test(int flags)
{
uint old_value;
int ret = 0;
post_log("\n");
old_value = in_be32((void *)GDC_SCRATCH_REG);
if (gdc_test_reg_one(0x55555555))
ret = 1;
if (gdc_test_reg_one(0xAAAAAAAA))
ret = 1;
out_be32((void *)GDC_SCRATCH_REG, old_value);
old_value = in_be32((void *)GDC_VERSION_REG);
post_log("GDC chip version %u.%u, year %04X\n",
(old_value >> 8) & 0xFF, old_value & 0xFF,
(old_value >> 16) & 0xFFFF);
old_value = get_ram_size((void *)GDC_RAM_START,
GDC_RAM_END - GDC_RAM_START);
post_log("GDC RAM size: %d bytes\n", old_value);
return ret;
}
#endif /* CONFIG_POST & CFG_POST_BSPEC4 */
#endif /* CONFIG_POST */
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