[people/ms/u-boot.git] / post / board / lwmon5 / gdc.c

/*
 * (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>

/* 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 & CONFIG_SYS_POST_BSPEC4

static int gdc_test_reg_one(uint value)
{
	int ret;
	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);
	}

	return (read_value != value);
}

/* 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);

	/*
	 * GPIOC2 register behaviour: the LIME graphics processor has a
	 * maximum of 5 GPIO ports that can be used in this hardware
	 * configuration. Thus only the  bits  for these 5 GPIOs can be
	 * activated in the GPIOC2 register. All other bits will always be
	 * read as zero.
	 */
	if (gdc_test_reg_one(0x00150015))
		ret = 1;
	if (gdc_test_reg_one(0x000A000A))
		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 & CONFIG_SYS_POST_BSPEC4 */
Commit	Line	Data
65b20dce YT	1	/*
	2	* (C) Copyright 2008 Dmitry Rakhchev, EmCraft Systems, rda@emcraft.com
	3	*
	4	* Developed for DENX Software Engineering GmbH
	5	*
	6	* See file CREDITS for list of people who contributed to this
	7	* project.
	8	*
	9	* This program is free software; you can redistribute it and/or
	10	* modify it under the terms of the GNU General Public License as
	11	* published by the Free Software Foundation; either version 2 of
	12	* the License, or (at your option) any later version.
	13	*
	14	* This program is distributed in the hope that it will be useful,
	15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	* GNU General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU General Public License
	20	* along with this program; if not, write to the Free Software
	21	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	22	* MA 02111-1307 USA
	23	*/
	24	#include <common.h>
	25
65b20dce YT	26	/* This test attempts to verify board GDC. A scratch register tested, then
	27	* simple memory test (get_ram_size()) run over GDC memory.
	28	*/
	29
	30	#include <post.h>
	31
	32	#include <asm/io.h>
	33
	34	DECLARE_GLOBAL_DATA_PTR;
	35
3a5d1e7f	36	#define GDC_SCRATCH_REG 0xC1FF8044
65b20dce YT	37	#define GDC_VERSION_REG 0xC1FF8084
	38	#define GDC_RAM_START 0xC0000000
	39	#define GDC_RAM_END 0xC2000000
	40
6d0f6bcf	41	#if CONFIG_POST & CONFIG_SYS_POST_BSPEC4
65b20dce YT	42
	43	static int gdc_test_reg_one(uint value)
	44	{
3a5d1e7f	45	int ret;
65b20dce YT	46	uint read_value;
	47
	48	/* write test pattern */
	49	out_be32((void *)GDC_SCRATCH_REG, value);
	50	/* read other location (protect against data lines capacity) */
	51	ret = in_be32((void *)GDC_RAM_START);
	52	/* verify test pattern */
	53	read_value = in_be32((void *)GDC_SCRATCH_REG);
	54	if (read_value != value) {
	55	post_log("GDC SCRATCH test failed write %08X, read %08X\n",
	56	value, read_value);
65b20dce YT	57	}
65b20dce YT	58
3a5d1e7f	59	return (read_value != value);
65b20dce YT	60	}
	61
	62	/* Verify GDC, get memory size */
	63	int gdc_post_test(int flags)
	64	{
	65	uint old_value;
	66	int ret = 0;
	67
	68	post_log("\n");
	69	old_value = in_be32((void *)GDC_SCRATCH_REG);
	70
3a5d1e7f YT	71	/*
	72	* GPIOC2 register behaviour: the LIME graphics processor has a
	73	* maximum of 5 GPIO ports that can be used in this hardware
	74	* configuration. Thus only the bits for these 5 GPIOs can be
	75	* activated in the GPIOC2 register. All other bits will always be
	76	* read as zero.
	77	*/
	78	if (gdc_test_reg_one(0x00150015))
65b20dce	79	ret = 1;
3a5d1e7f	80	if (gdc_test_reg_one(0x000A000A))
65b20dce YT	81	ret = 1;
	82
	83	out_be32((void *)GDC_SCRATCH_REG, old_value);
	84
	85	old_value = in_be32((void *)GDC_VERSION_REG);
	86	post_log("GDC chip version %u.%u, year %04X\n",
	87	(old_value >> 8) & 0xFF, old_value & 0xFF,
	88	(old_value >> 16) & 0xFFFF);
	89
	90	old_value = get_ram_size((void *)GDC_RAM_START,
	91	GDC_RAM_END - GDC_RAM_START);
	92	post_log("GDC RAM size: %d bytes\n", old_value);
	93
	94	return ret;
	95	}
6d0f6bcf	96	#endif /* CONFIG_POST & CONFIG_SYS_POST_BSPEC4 */