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Diffstat (limited to 'post/board/lwmon5/gdc.c')
| -rw-r--r-- | post/board/lwmon5/gdc.c | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/post/board/lwmon5/gdc.c b/post/board/lwmon5/gdc.c new file mode 100644 index 0000000..76e5dd6 --- /dev/null +++ b/post/board/lwmon5/gdc.c @@ -0,0 +1,94 @@ +/* + * (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 */ + |