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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 performs testing of FPGA SCRATCH register,
* gets FPGA version and run get_ram_size() on FPGA memory
*/
#include <post.h>
#include <asm/io.h>
DECLARE_GLOBAL_DATA_PTR;
#define FPGA_SCRATCH_REG 0xC4000050
#define FPGA_VERSION_REG 0xC4000040
#define FPGA_RAM_START 0xC4200000
#define FPGA_RAM_END 0xC4203FFF
#define FPGA_STAT 0xC400000C
#define FPGA_PWM_CTRL_REG 0xC4000020
#define FPGA_PWM_TV_REG 0xC4000024
/* Turn on backlight, set brightness */
void fpga_backlight_enable(int pwm)
{
out_be16((void *)FPGA_PWM_CTRL_REG, 0x0701);
out_be16((void *)FPGA_PWM_TV_REG, pwm);
}
#if CONFIG_POST & CFG_POST_BSPEC3
static int one_scratch_test(uint value)
{
uint read_value;
int ret = 0;
out_be32((void *)FPGA_SCRATCH_REG, value);
/* read other location (protect against data lines capacity) */
ret = in_be16((void *)FPGA_VERSION_REG);
/* verify test pattern */
read_value = in_be32((void *)FPGA_SCRATCH_REG);
if (read_value != value) {
post_log("FPGA SCRATCH test failed write %08X, read %08X\n",
value, read_value);
ret = 1;
}
return ret;
}
/* Verify FPGA, get version & memory size */
int fpga_post_test(int flags)
{
uint old_value;
ushort version;
uint read_value;
int ret = 0;
post_log("\n");
old_value = in_be32((void *)FPGA_SCRATCH_REG);
if (one_scratch_test(0x55555555))
ret = 1;
if (one_scratch_test(0xAAAAAAAA))
ret = 1;
out_be32((void *)FPGA_SCRATCH_REG, old_value);
version = in_be16((void *)FPGA_VERSION_REG);
post_log("FPGA : version %u.%u\n",
(version >> 8) & 0xFF, version & 0xFF);
/* Enable write to FPGA RAM */
out_be32((void *)FPGA_STAT, in_be32((void *)FPGA_STAT) | 0x1000);
read_value = get_ram_size((void *)CFG_FPGA_BASE_1, 0x4000);
post_log("FPGA RAM size: %d bytes\n", read_value);
return ret;
}
#endif /* CONFIG_POST & CFG_POST_BSPEC3 */
#endif /* CONFIG_POST */
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